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Dept. of Hydromechanics and Modelling of Hydrosystems
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Publications at LH2

Department of Hydromechanics and Modelling of Hydrosystems

PhD-Theses and Professoral Dissertations

2023
1. Veyskarami, M. (2023). Coupled free-flow-porous media flow processes including drop formation (Vol. 303) [Promotionsschrift, Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart]. http://dx.doi.org/10.18419/opus-13894
2. Mohammadi, F. (2023). A surrogate-assisted Bayesian framework for uncertainty-aware validation benchmarks (Dissertation No. 299, Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart). https://doi.org/10.18419/opus-13285
2022
1. Michalkowski, C. (2022). Modeling water transport at the interface between porous GDL and gas distributor of a PEM fuel cell cathode (Dissertation No. 286, Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung). https://doi.org/10.18419/opus-12106
2. Weinhardt, F. (2022). Porosity and permeability alterations in processes of biomineralization in porous media - microfluidic investigations and their interpretation (Dissertation No. 297, Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart). https://doi.org/10.18419/opus-12822
2021
1. Ackermann, S. (2021). A multi-scale approach for drop/porous-medium interaction (Vol. 281) [Promotionsschrift, Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart]. https://doi.org/10.18419/opus-11577
2. Becker, B. (2021). Development of efficient multiscale multiphysics models accounting for reversible flow at various subsurface energy storage sites (Dissertation No. 284, Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart). https://doi.org/10.18419/opus-11753
3. Seitz, G. (2021). Modeling fixed-bed reactors for thermochemical heat storage with the reaction system CaO/Ca(OH)2 (Dissertation No. 278, Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung). https://doi.org/10.18419/opus-11522
4. Emmert, S. (2021). Developing and calibrating a numerical model for microbially enhanced coal-bed methane production (Vol. 279) [Promotionsschrift, Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart]. https://doi.org/10.18419/opus-11631
5. Heck, K. (2021). Modelling and analysis of multicomponent transport at the interface between free- and porous-medium flow - influenced by radiation and roughness (Vol. 280) [Promotionsschrift, Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart]. https://doi.org/10.18419/opus-11635
2020
1. Weishaupt, K. (2020). Model concepts for coupling free flow with porous medium flow at the pore-network scale : from single-phase flow to compositional non-isothermal two-phase flow (Vol. 273) [Dissertation, Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung]. https://doi.org/10.18419/opus-10932
2. Koch, T. (2020). Mixed-dimension models for flow and transport processes in porous media with embedded tubular network systems (Vol. 274) [Dissertation, Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung]. https://doi.org/10.18419/opus-10975
3. Gläser, D. (2020). Discrete fracture modeling of multi-phase flow and deformation in fractured poroelastic media (Vol. 275) [Phdthesis, Stuttgart: Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart]. http://dx.doi.org/10.18419/opus-11040
2019
1. Haas, J. (2019). Optimal planning of hydropower and energy storage technologies for fully renewable power systems [Phdthesis, Stuttgart : Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart]. http://dx.doi.org/10.18419/opus-10297
2. Beck, M. (2019). Conceptual approaches for the analysis of coupled hydraulic and geomechanical processes [Phdthesis, Stuttgart : Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart]. http://dx.doi.org/10.18419/opus-10418
3. Schneider, M. (2019). Nonlinear finite volume schemes for complex flow processes and challenging grids [PhD Thesis, Stuttgart : Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart]. http://dx.doi.org/10.18419/opus-10416
2018
1. Fetzer, T. (2018). Coupled Free and Porous-Medium Flow Processes Affected by Turbulence and Roughness - Models, Concepts and Analysis (Vol. 259) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung]. https://doi.org/10.18419/opus-10016
2. Beck, M. (2018). Conceptual approaches for the analysis of coupled hydraulic and geomechanical processes (Vol. 265) [Promotionsschrift, Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart]. https://doi.org/10.18419/opus-10418
3. Fetzer, T. (2018). Coupled free and porous-medium flow processes affected by turbulence and roughness : models, concepts and analysis [Phdthesis, Stuttgart : Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart]. http://dx.doi.org/10.18419/opus-10016
4. Mejri, E. (2018). Modeling and Analysis of Salt Precipitation on Evaporation Processes in the Unsaturated Zone [Promotionsschrift]. Université de Tunis El Manar, Ecole Nationale d´Ingenieurs de Tunis.
5. Bode, F. (2018). Early-warning monitoring systems for improved drinking water resource protection [Phdthesis, Stuttgart : Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart]. http://dx.doi.org/10.18419/opus-10268
2017
1. Grüninger, C. (2017). Numerical Coupling of Navier-Stokes and Darcy Flow for Soil-Water Evaporation (Vol. 253) [Promotionsschrift, Universität Stuttgart,]. https://elib.uni-stuttgart.de/handle/11682/9674
2. Grüninger, C. (2017). Numerical coupling of Navier-Stokes and Darcy flow for soil-water evaporation (Vol. 253) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung]. https://doi.org/10.18419/opus-9657
2016
1. Hommel, J. (2016). Modeling biogeochemical and mass transport processes in the subsurface: Investigation of microbially induced calcite precipitation (Vol. 244) [Promotionsschrift, Universität Stuttgart, TASK]. https://elib.uni-stuttgart.de/handle/11682/8787
2. Kissinger, A. (2016). Basin-Scale Site Screening and Investigation of Possible Impacts of CO2 Storage on Subsurface Hydrosystems (Vol. 251) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung]. https://dx.doi.org/10.18419/opus-8998
2015
1. Baber, K. (2015). Coupling free flow and flow in porous media in biological and technical applications: From a simple to a complex interface description (Vol. 236) [Promotionsschrift, Universität Stuttgart, TASK]. https://elib.uni-stuttgart.de/opus/volltexte/2015/9770/
2. Nuske, P. (2015). Beyond local equilibrium : relaxing local equilibrium assumptions in multiphase flow in porous media (Vol. 237) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung]. https://elib.uni-stuttgart.de/opus/volltexte/2015/9796/pdf/thesisPhilippNuskeMerged.pdf
3. Schwenck, N. (2015). An XFEM-Based Model for Fluid Flow in Fractured Porous Media (Vol. 239) [Promotionsschrift, Universität Stuttgart, TASK]. https://elib.uni-stuttgart.de/opus/volltexte/2015/10017/
4. Nuske, P. (2015). Beyond local equilibrium : relaxing local equilibrium assumptions in multiphase flow in porous media (Vol. 237) [Promotionsschrift, Universität Stuttgart, TASK]. https://elib.uni-stuttgart.de/opus/volltexte/2015/9796/
2014
1. Koch, J. (2014). Simulation, identification and characterization of contaminant source architectures in the subsurface (Vol. 233) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- Umweltsystemmodellierung]. https://elib.uni-stuttgart.de/opus/volltexte/2014/9488/
2. Faigle, B. (2014). Adaptive modelling of compositional multi-phase flow with capillary pressure. (Vol. 230) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung]. https://elib.uni-stuttgart.de/opus/volltexte/2014/9068/
3. Lauser, A. (2014). Theory and Numerical Applications of Compositional Multi-Phase Flow in Porous Media (Vol. 228) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung]. https://elib.uni-stuttgart.de/opus/volltexte/2014/9074/pdf/lauser_thesis_2print.pdf
4. Oladyshkin, S. (2014). Efficient modeling of environmental systems in the face of complexity and uncertainty (Vol. 231) [Habilitationsschrift, Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung]. https://elib.uni-stuttgart.de/opus/volltexte/2015/9523/pdf/Oladyshkin_HabilitationThesis.pdf
5. Lauser, A. (2014). Theory and numerical applications of compositional multi-phase flow in porous media (Vol. 228) [Promotionsschrift, Universität Stuttgart, TASK]. https://elib.uni-stuttgart.de/opus/volltexte/2014/9074/
6. Eder, M. (2014). Climate sensitivity of a large lake (Vol. 226) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- Umweltsystemmodellierung]. https://elib.uni-stuttgart.de/opus/volltexte/2014/8885/
7. Faigle, B. (2014). Adaptive modelling of compositional multi-phase flow with capillary pressure (Vol. 230) [Promotionsschrift, Universität Stuttgart, TASK]. https://elib.uni-stuttgart.de/opus/volltexte/2014/9068/
8. Mosthaf, K. (2014). Modeling and Analysis of Coupled Porous - Medium and Free Flow with Application to Evaporation Processes (Vol. 223) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung]. https://elib.uni-stuttgart.de/opus/volltexte/2014/9064/pdf/DISSERTATION_KlausMosthaf_final.pdf
9. Mosthaf, K. (2014). Modeling and analysis of coupled porous-medium and free flow with application to evaporation processes (Vol. 223) [Promotionsschrift, Universität Stuttgart, TASK]. https://elib.uni-stuttgart.de/opus/volltexte/2014/9064/
10. Enzenhöfer, R. (2014). Risk quantification and management in water production and supply systems (Vol. 229) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- Umweltsystemmodellierung]. https://elib.uni-stuttgart.de/opus/volltexte/2014/9015/
2013
1. Leube, P. (2013). Methods for physically-based model reduction in time: analysis, comparison of methods and application (Vol. 224) [Promotionsschrift, Universität Stuttgart, TASK]. https://elib.uni-stuttgart.de/opus/volltexte/2013/8801/
2. Tatomir, A. (2013). From discrete to continuum concepts of flow in fractured porous media (Vol. 212) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- Umweltsystemmodellierung]. https://elib.uni-stuttgart.de/opus/volltexte/2013/8047/
3. Greiner, P. (2013). Alkoholinjektion zur In-situ-Sanierung von CKW-Schadensherden in Grundwasserleitern: Charakterisierung der relevanten Prozesse auf unterschiedlichen Skalen (Vol. 227) [Promotionsschrift, Universität Stuttgart, Institut für Wasser-und Umweltsystemmodellierung]. http://dx.doi.org/10.18419/opus-521
4. Flemisch, B. (2013). Tackling Coupled Problems in Porous Media: Development of Numerical Models and an Open Source Simulator [Habilitationsschrift, Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung]. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2013/flemisch_habil.pdf
5. Walter, L. (2013). Uncertainty Studies and Risk Assessment for CO2 Storage in Geological Formations (Vol. 221) [Promotionsschrift, Universität Stuttgart, TASK]. https://elib.uni-stuttgart.de/opus/volltexte/2013/8830/
6. Wolff, M. (2013). Multi-Scale Modeling of Two-Phase Flow in Porous Media Including Capillary Pressure Effects (Vol. 222) [Promotionsschrift, Universität Stuttgart, TASK]. https://elib.uni-stuttgart.de/opus/volltexte/2013/8661/
7. Leube, P. (2013). Methods for Physically-Based Model Reduction in Time: Analysis, Comparison of Methods and Application (Vol. 224) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung]. https://elib.uni-stuttgart.de/opus/volltexte/2013/8801/pdf/diss_final_Leube_bib_v2.pdf
2012
1. de Boer, C. (2012). Transport of nano sized zero valent iron colloids during injection into the subsurface (Vol. 215) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- Umweltsystemmodellierung]. http://dx.doi.org/10.18419/opus-486
2. Erbertseder, K. (2012). A multi-scale model for describing cancer-therapeutic transport in the human lung (Vol. 213) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung]. https://elib.uni-stuttgart.de/opus/volltexte/2012/7200/
3. Darcis, M. (2012). Coupling Models of Different Complexity for the Simulation of CO2 Storage in Deep Saline Aquifers (Vol. 218) [Promotionsschrift, Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung]. https://elib.uni-stuttgart.de/opus/volltexte/2013/8141/
2011
1. Kuhlmann, A. (2011). Influence of soil structure and root water uptake on flow in the unsaturated zone (Vol. 209) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2012/7214/
2010
1. Cao, Y. (2010). Robust numerical algorithms based on corrected operator splitting for two-phase flow in porous media [Promotionsschrift, Universität Stuttgart, Universität Stuttgart]. https://www.shaker.de/de/content/catalogue/index.asp?lang=de&ID=8&ISBN=978-3-8322-9237-9
2. Niessner, J. (2010). The Role of Interfacial Areas in Two-Phase Flow in Porous Media -- bridging scales and coupling models [Habilitationsschrift, Universität Stuttgart, Institut für Wasserbau]. In Universität Stuttgart, Stuttgart. https://elib.uni-stuttgart.de/opus/volltexte/2011/6305/
3. Fritz, J. (2010). A decoupled model for compositional non-isothermal multiphase flow in porous media and multiphysics approaches for two-phase flow (Vol. 192) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung]. https://elib.uni-stuttgart.de/opus/volltexte/2010/5683
4. Vasin, M. (2010). Influence of the soil structure and property contrast on flow and transport in the unsaturated zone (Vol. 186) [Promotionsschrift, ,]. https://elib.uni-stuttgart.de/opus/volltexte/2010/5169/
5. Fritz, J. (2010). A decoupled model for compositional non-isothermal multiphase flow in porous media and multiphysics approaches for two-phase flow (Vol. 192) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung]. https://elib.uni-stuttgart.de/opus/volltexte/2010/5683/pdf/diss_complete.pdf
6. Dogan, M. O. (2010). Coupling of porous media flow with pipe flow (Vol. 199) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2011/5942/
2009
1. Kopp, A. (2009). Evaluation of CO2 injection processes in geological formations for site screening (Vol. 182) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. http://elib.uni-stuttgart.de/opus/volltexte/2009/4518/pdf/Dissertation_AndreasKopp.pdf
2. Ebigbo, A. (2009). Modelling of biofilm growth and its influence on CO2 and water (two-phase) flow in porous media (Vol. 183) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. http://elib.uni-stuttgart.de/opus/volltexte/2009/4489/pdf/Ebigbo_DISS_OPUS.pdf
2008
1. Papafotiou, A. (2008). Numerical Investigations on the Role of Hysteresis in Heterogeneous Two-Phase Flow Systems (Vol. 171) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2008/3567/
2. Freiboth, S. (2008). A phenomenological model for the numerical simulation of multiphase multicomponent processes considering structural alternations of porous media (Vol. 184) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2009/4610/pdf/Dissertation_Freiboth_Sandra.pdf
3. Assteerawatt, A. (2008). Flow and Transport Modelling of Fractured Aquifers based on a Geostatistical Approach (Vol. 176) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2008/3639/
4. Class, H. (2008). Models for non-isothermal compositional gas-liquid flow and transport in porous media [Habilitationsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2009/3847/pdf/class_habil_version1.1.pdf
2007
1. Bielinski, A. (2007). Numerical Simulation of CO2 Sequestration in Geological Formations (Vol. 155) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2007/2953/
2. Ochs, S. O. (2007). Steam injection into saturated porous media - process analysis including experimental and numerical investigations - (Vol. 159) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2007/2971/
2006
1. Manthey, S. (2006). Two-phase flow processes with dynamic effects in porous media - parameter estimation and simulation (Vol. 157) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2007/2951/
2. Niessner, J. (2006). Multi-Scale Modeling of Multi-Phase - Multi-Component Processesin Heterogeneous Porous Media (Vol. 151) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2006/2769/
3. Flemisch, B. (2006). Non-matching triangulations of curvilinear interfaces applied to electro-mechanics and elasto-acoustics [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/flemisch_thesis.pdf
4. Breiting, T. (2006). Techniken und Methoden der Hydroinformatik - Modellierung von komplexen Hydrosystemen im Untergrund (Vol. 144) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2006/2646/pdf/PROMO_PDF.pdf
2005
1. Rahman, A. Md. (2005). Experimental Investigations on Transverse Dispersive Mixing in Heterogeneous Porous Media (Vol. 140) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2005/2284
2. Jose Chackiath, S. (2005). Experimental Investigations on Longitudinal Dispersive Mixing in Heterogeneous Aquifers (Vol. 136) [Promotionsschrift]. Universität Stuttgart, Institut für Wasserbau.
3. Nowak, W. (2005). Geostatistical Methods for the Identification of Flow and Transport Parameters in the Subsurface (Vol. 134) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2005/2275
4. Kobayashi, K. (2005). Optimization Methods for Multiphase Systems in the Subsurface - Application to Methane Migration in Coal Mining Areas (Vol. 139) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2005/2297
5. Jabir, A. K. (2005). Finite Volume Models for Multiphase Multicomponent Flow through Porous Media (Vol. 132) [Promotionsschrift]. Universität Stuttgart, Institut für Wasserbau.
6. Süß, M. (2005). Analysis of the influence of structures and boundaries on flow and transport processes in fractured porous media (Vol. 135) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2005/2229
2004
1. Jakobs, H. (2004). Simulation nicht-isothermer Gas-Wasser-Prozesse in komplexen Kluft-Matrix-Systemen (Vol. 128) [Promotionsschrift]. Universität Stuttgart, Institut für Wasserbau.
2003
1. Hinkelmann, R. (2003). Efficient Numerical Methods and Information-Processing Techniques in Environment Water (Vol. 117) [Habilitationsschrift]. Universität Stuttgart, Institut für Wasserbau.
2. Appt, J. (2003). Analysis of Basin-Scale Internal Waves in Upper Lake Constance (Vol. 123) [Promotionsschrift]. Universität Stuttgart, Institut für Wasserbau.
3. Neunhäuserer, L. (2003). Diskretisierungsansätze zur Modellierung von Strömungs- und Transportprozessen in geklüftet-porösen Medien (Vol. 119) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2003/1477/
4. Paul, M. (2003). Simulation of Two-Phase Flow Processes in Heterogeneous Porous Media with Adaptive Methods (Vol. 120) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2005/2435/pdf/promo_paul.pdf
2002
1. Silberhorn-Hemminger, A. (2002). Modellierung von Kluftaquifersystemen: Geostatistische Analyse und deterministisch-stochastische Kluftgenerierung (Vol. 114) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2003/1278/
2001
1. Class, H. (2001). Theorie und numerische Modellierung nichtisothermer Mehrphasenprozesse in NAPL-kontaminierten porösen Medien (Vol. 105) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2005/2436/pdf/promo_holle.pdf
2. Lang, S. (2001). Parallele numerische Simulation instationärer Probleme mit adaptiven Methoden auf unstrukturierten Gittern (Vol. 110) [Promotionsschrift]. Universität Stuttgart, Institut für Wasserbau.
2000
1. Huber, R. U. (2000). Compositional Multiphase Flow and Transport in Heterogeneous Porous Media (Vol. 102) [Promotionsschrift]. Universität Stuttgart, Institut für Wasserbau.
2. Braun, C. (2000). Ein Upscaling-Verfahren für Mehrphasenströmungen in porösen Medien (Vol. 103) [Promotionsschrift]. Universität Stuttgart, Institut für Wasserbau.
1999
1. Sheta, H. (1999). Simulation von Mehrphasenvorgängen in porösen Medien unter Einbeziehung von Hystereseeffekten (Vol. 100) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2005/2437/pdf/promo_sheta.pdf
1998
1. Betz, C. (1998). Wasserdampfdestillation von Schadstoffen im porösen Medium: Entwicklung einer thermischen In-situ-Sanierungstechnologie (Vol. 97) [Promotionsschrift]. Universität Stuttgart, Institut für Wasserbau.
1997
1. Helmig, R. (1997). Gekoppelte Strömungs- und Transportprozesse im Untergrund: Ein Beitrag zur Hydrosystemmodellierung (Vol. 91) [Habilitationsschrift]. Universität Stuttgart, Institut für Wasserbau.
2. Emmert, M. (1997). Numerische Modellierung nichtisothermer Gas-Wasser Systeme in porösen Medien (Vol. 92) [Promotionsschrift]. Universität Stuttgart, Institut für Wasserbau.
3. Cirpka, O. A. (1997). Numerische Methoden zur Simulation des reaktiven Mehrkomponententransports im Grundwasser (Vol. 95) [Promotionsschrift, Universität Stuttgart, Institut für Wasserbau]. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/095_Cirpka_Olaf_Diss.pdf

Scientific Publications of the LH2 group

2025
1. Vahabzadeh, E., Buntic, I., Nazari, F., Flemisch, B., Helmig, R., & Niasar, V. (2025). Applicability of the Vertical Equilibrium model to underground hydrogen injection and withdrawal. International Journal of Hydrogen Energy, 106, 790–805. https://doi.org/10.1016/j.ijhydene.2025.01.201
  - BibTeX
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  BibTeX
  @article{applicabilityOfVE2025, abstract = {Underground hydrogen storage (UHS) has emerged as a significant focus for the energy transition from fossil fuels to renewable energy. Saline aquifers, akin to those used in geological CO2 storage, are proposed due to their potential as reservoirs for hydrogen injection and withdrawal over extended periods. Modeling the drainage and imbibition processes at the reservoir scale is critical for efficient UHS implementation. To address the excessive computational costs of three-dimensional simulations over hundreds of cycles, low-order models such as the Vertical Equilibrium (VE) models offer practicality. This study centers on the VE model’s applicability to predict hydrogen plume shapes during a single injection and withdrawal cycle, considering varying viscous, capillary, and buoyancy forces, captured by Capillary number (Ca) and Bond number (Bo). Examining Ca values from 1.5 × 10−9 to 1.5 × 10−7 and Bo numbers from 0.1 to 0.3, we compared VE results to a 2D two-phase simulation, serving as the reference solution. For small Ca, the VE method accurately predicted both vertical and horizontal hydrogen plume distributions, although it occasionally overestimated lateral spread at high injection rates. As the vertical permeability and Bo increase, the VE predictions become more aligned with the reference solution. This is because greater density-driven flow and improved vertical connectivity make the phase segregation easier. Our study also demonstrated the VE model’s promising performance in hydrogen recovery during withdrawal at small Ca and large Bo.}, author = {Vahabzadeh, Ehsan and Buntic, Ivan and Nazari, Farzaneh and Flemisch, Bernd and Helmig, Rainer and Niasar, Vahid}, doi = {https://doi.org/10.1016/j.ijhydene.2025.01.201}, issn = {0360-3199}, journal = {International Journal of Hydrogen Energy}, pages = {790-805}, title = {Applicability of the Vertical Equilibrium model to underground hydrogen injection and withdrawal}, url = {https://www.sciencedirect.com/science/article/pii/S036031992500223X}, volume = 106, year = 2025 }
  Link
  https://www.sciencedirect.com/science/article/pii/S036031992500223X
2. Keim, L., & Class, H. (2025). Rayleigh Invariance Allows the Estimation of Effective CO2 Fluxes Due To Convective Dissolution Into Water-Filled Fractures. Water Resources Research, 61, Article 2. https://doi.org/10.1029/2024WR037778
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  @article{https://doi.org/10.1029/2024WR037778, abstract = {Abstract Convective dissolution of CO2 \${\text{CO}}\_{2}\$ is a well-known mechanism in geological storage of CO2 \${\text{CO}}\_{2}\$. It is triggered by gravitational instability which leads to the onset of free convection. The phenomenon is well studied in porous media, such as saline aquifers, and the literature provides substantial evidence that onset times and effective flux rates can be estimated based on a characterization of instabilities that uses the Darcy velocity. This work extends the study of convective dissolution to open water-filled fractures, where non-Darcy regimes govern the induced flow processes. Numerical simulations using a Navier-Stokes model with fluid density dependent on dissolved CO2 \${\text{CO}}\_{2}\$ concentration were used to compute scenario-specific results for effective CO2 \${\text{CO}}\_{2}\$ entry rates into an idealized fracture with varying aperture, temperature, and CO2 \${\text{CO}}\_{2}\$ concentration at the gas-water interface. The results were analyzed in terms of dimensionless quantities. They revealed a Rayleigh invariance of the effective CO2 \${\text{CO}}\_{2}\$ flux after the complete formation of a quasi-stationary velocity profile, that is, after a certain entry length. Hence, this invariance can be exploited to estimate the effective CO2 \${\text{CO}}\_{2}\$ entry rates, which can then be used, in perspective, in upscaled models. We have studied convective CO2 \${\text{CO}}\_{2}\$ dissolution for two different fracture settings; the first one relates to karstification scenarios, where CO2 \${\text{CO}}\_{2}\$ is the dominant driving force, and were stagnant-water conditions in fractures have not yet received attention to date. The second setting is inspired from geological CO2 \${\text{CO}}\_{2}\$ storage, where the literature provides only studies on convective CO2 \${\text{CO}}\_{2}\$ dissolution for porous-media flow with Darcy regimes.}, author = {Keim, Leon and Class, Holger}, doi = {https://doi.org/10.1029/2024WR037778}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2024WR037778}, journal = {Water Resources Research}, note = {e2024WR037778 2024WR037778}, number = 2, pages = {e2024WR037778}, title = {Rayleigh Invariance Allows the Estimation of Effective CO2 Fluxes Due To Convective Dissolution Into Water-Filled Fractures}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2024WR037778}, volume = 61, year = 2025 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2024WR037778
3. Krach, D., Weinhardt, F., Wang, M., Schneider, M., Class, H., & Steeb, H. (2025). A novel geometry-informed drag term formulation for pseudo-3D Stokes simulations with varying apertures. Advances in Water Resources, 195, 104860. https://doi.org/10.1016/j.advwatres.2024.104860
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  @article{https://doi.org/10.1016/j.advwatres.2024.104860, abstract = {Alterations in the pore morphology of porous materials cause changes to the characteristic hydraulic properties, which are mostly non-linear and inherently difficult to predetermine. Assuming the alterations are known with sufficient accuracy, the relation between the altered pore structure, measured in terms of porosity, and intrinsic permeability may be determined by simulations with enormous computational effort. We focus on microfluidic experiments during the course of which the pore space becomes increasingly occupied with solid precipitate over elapsed process time. To analyze these domains, we present a novel geometry-informed drag formulation which allows for solving pseudo-3D Stokes equations for image-based input data of clogging porous media with accuracy and efficiency. In a pre-processing step, local pore space properties are analyzed and employed to spatially vary the magnitude of the drag term, which reflects the influence of neglected 3D effects. Calibration and validation is achieved through fully 3D Finite Difference Stokes simulations of different benchmark cases. With the proposed formulation we achieve the high accuracy of the pseudo-3D methods as far as permeability is concerned (<30% deviation), but also with respect to local velocities, for a microfluidic domain throughout the clogging process. Noteworthy, the computational cost is being reduced to less than 1%. Combining the efficiency of a Stokes 2D simulation and accuracy of a 3D model the presented approach is rendered an interesting option to investigate remaining open questions, for example on anisotropy of effective hydraulic parameters during the clogging process.}, author = {Krach, David and Weinhardt, Felix and Wang, Mingfeng and Schneider, Martin and Class, Holger and Steeb, Holger}, doi = {https://doi.org/10.1016/j.advwatres.2024.104860}, issn = {0309-1708}, journal = {Advances in Water Resources}, pages = 104860, title = {A novel geometry-informed drag term formulation for pseudo-3D Stokes simulations with varying apertures}, url = {https://www.sciencedirect.com/science/article/pii/S0309170824002471}, volume = 195, year = 2025 }
  Link
  https://www.sciencedirect.com/science/article/pii/S0309170824002471
2024 (submitted)
1. Kohlhaas, R., Hommel, J., Weinhardt, F., Class, H., Oladyshkin, S., & Flemisch, B. (n.d.). Numerical Investigation of Preferential Flow Paths in Enzymatically Induced Calcite Precipitation Supported by Bayesian Model Analysis. Transport in Porous Media.
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  @article{kohlhaas2024numerical, author = {Kohlhaas, R. and Hommel, J. and Weinhardt, F. and Class, H. and Oladyshkin, S. and Flemisch, B.}, journal = {Transport in Porous Media}, title = {Numerical Investigation of Preferential Flow Paths in Enzymatically Induced Calcite Precipitation Supported by Bayesian Model Analysis}, year = {2024 (submitted)} }
2024
1. Coltman, E., Schneider, M., & Helmig, R. (2024). Data-Driven Closure Parametrizations with Metrics: Dispersive Transport. https://arxiv.org/abs/2311.13975
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  @misc{coltman2024datadrivenclosureparametrizationsmetrics, archiveprefix = {arXiv}, author = {Coltman, Edward and Schneider, Martin and Helmig, Rainer}, eprint = {2311.13975}, primaryclass = {math.NA}, title = {Data-Driven Closure Parametrizations with Metrics: Dispersive Transport}, url = {https://arxiv.org/abs/2311.13975}, year = 2024 }
  Link
  https://arxiv.org/abs/2311.13975
2. Aricò, C., Helmig, R., Puleo, D., & Schneider, M. (2024). A new numerical mesoscopic scale one-domain approach solver for free fluid/porous medium interaction. Computer Methods in Applied Mechanics and Engineering, 419, 116655. https://doi.org/10.1016/j.cma.2023.116655
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  @article{ARICO2024116655, abstract = {A new numerical continuum one-domain approach (ODA) solver is presented for the simulation of the transfer processes between a free fluid and a porous medium. The solver is developed in the mesoscopic scale framework, where a continuous variation of the physical parameters of the porous medium (e.g., porosity and permeability) is assumed. The Navier–Stokes–Brinkman equations are solved along with the continuity equation, under the hypothesis of incompressible fluid. The porous medium is assumed to be fully saturated and can potentially be anisotropic. The domain is discretized with unstructured meshes allowing local refinements. A fractional time step procedure is applied, where one predictor and two corrector steps are solved within each time iteration. The predictor step is solved in the framework of a marching in space and time procedure, with some important numerical advantages. The two corrector steps require the solution of large linear systems, whose matrices are sparse, symmetric and positive definite, with M-matrix property over Delaunay-meshes. A fast and efficient solution is obtained using a preconditioned conjugate gradient method. The discretization adopted for the two corrector steps can be regarded as a Two-Point-Flux-Approximation (TPFA) scheme, which, unlike the standard TPFA schemes, does not require the grid mesh to be K-orthogonal, (with K the anisotropy tensor). As demonstrated with the provided test cases, the proposed scheme correctly retains the anisotropy effects within the porous medium. Furthermore, it overcomes the restrictions of existing mesoscopic scale one-domain approaches proposed in the literature.}, author = {Aricò, Costanza and Helmig, Rainer and Puleo, Daniele and Schneider, Martin}, doi = {https://doi.org/10.1016/j.cma.2023.116655}, issn = {0045-7825}, journal = {Computer Methods in Applied Mechanics and Engineering}, month = {02}, pages = 116655, title = {A new numerical mesoscopic scale one-domain approach solver for free fluid/porous medium interaction}, url = {https://www.sciencedirect.com/science/article/pii/S0045782523007788}, volume = 419, year = 2024 }
  Link
  https://www.sciencedirect.com/science/article/pii/S0045782523007788
3. Boon, M., Buntic, I., Ahmed, K., Dopffel, N., Peters, C., & Hajibeygi, H. (2024). Microbial induced wettability alteration with implications for Underground Hydrogen Storage. Scientific Reports, 14, Article 1. https://doi.org/10.1038/s41598-024-58951-6
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  @article{paper-2024-boon-microbials, abstract = {Characterization of the microbial activity impacts on transport and storage of hydrogen is a crucial aspect of successful Underground Hydrogen Storage (UHS). Microbes can use hydrogen for their metabolism, which can then lead to formation of biofilms. Biofilms can potentially alter the wettability of the system and, consequently, impact the flow dynamics and trapping mechanisms in the reservoir. In this study, we investigate the impact of microbial activity on wettability of the hydrogen/brine/rock system, using the captive-bubble cell experimental approach. Apparent contact angles are measured for bubbles of pure hydrogen in contact with a solid surface inside a cell filled with living brine which contains sulphate reducing microbes. To investigate the impact of surface roughness, two different solid samples are used: a ``rough'' Bentheimer Sandstone sample and a ``smooth'' pure Quartz sample. It is found that, in systems where buoyancy and interfacial forces are the main acting forces, the impact of biofilm formation on the apparent contact angle highly depends on the surface roughness. For the ``rough'' Bentheimer sandstone, the apparent contact angle was unchanged by biofilm formation, while for the smooth pure Quartz sample the apparent contact angle decreased significantly, making the system more water-wet. This decrease in apparent contact angle is in contrast with an earlier study present in the literature where a significant increase in contact angle due to microbial activity was reported. The wettability of the biofilm is mainly determined by the consistency of the Extracellular Polymeric Substances (EPS) which depends on the growth conditions in the system. Therefore, to determine the impact of microbial activity on the wettability during UHS will require accurate replication of the reservoir conditions including surface roughness, chemical composition of the brine, the microbial community, as well as temperature, pressure and pH-value conditions.}, author = {Boon, Maartje and Buntic, Ivan and Ahmed, Kadir and Dopffel, Nicole and Peters, Catherine and Hajibeygi, Hadi}, day = 08, doi = {10.1038/s41598-024-58951-6}, issn = {2045-2322}, journal = {Scientific Reports}, month = {04}, number = 1, pages = 8248, title = {Microbial induced wettability alteration with implications for Underground Hydrogen Storage}, url = {https://doi.org/10.1038/s41598-024-58951-6}, volume = 14, year = 2024 }
  Link
  https://doi.org/10.1038/s41598-024-58951-6
4. Buntic, I., Schneider, M., Flemisch, B., & Helmig, R. (2024). A fully-implicit solving approach to an adaptive multi-scale model -- coupling a vertical-equilibrium and full-dimensional model for compressible, multi-phase flow in porous media. https://arxiv.org/abs/2405.18285
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  @misc{buntic2024fullyimplicitsolvingapproachadaptive, archiveprefix = {arXiv}, author = {Buntic, Ivan and Schneider, Martin and Flemisch, Bernd and Helmig, Rainer}, eprint = {2405.18285}, primaryclass = {physics.flu-dyn}, title = {A fully-implicit solving approach to an adaptive multi-scale model -- coupling a vertical-equilibrium and full-dimensional model for compressible, multi-phase flow in porous media}, url = {https://arxiv.org/abs/2405.18285}, year = 2024 }
  Link
  https://arxiv.org/abs/2405.18285
5. Shokri, J., Schollenberger, T., An, S., Flemisch, B., Babaei, M., & Niasar, V. (2024). Upscaling the reaction rates in porous media from pore- to Darcy-scale. Chemical Engineering Journal, 493, 152000. https://doi.org/10.1016/j.cej.2024.152000
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  @article{SHOKRI2024152000, abstract = {Modeling and prediction of reactive transport in porous media are challenging due to the complexity of the characterization of reactions across spatial and time scales. The application of reaction rates obtained from batch experiments to porous media is not valid because it disregards the influences of flow pathways, distribution of residence time, transport limitations within the porous media, as well as neglecting the impact of surface mineralogy heterogeneity. In this study, we presented how the pore-scale modeling can help to improve the Darcy-scale simulations. First, the reactive transport was simulated in a pore-network model and was validated against the experiments. Then, the pore-network results were averaged to obtain the effective reaction rates as a function of pore velocity, the inlet concentration, and the resident concentration. The upscaled function was incorporated into the Darcy-scale model and showed a significant improvement in predicting the concentration profiles. Notably, the use of batch reaction rates in the Darcy model (ADRE-batch) led to significant underestimation, up to 93%, of the required pore volume injection for complete contaminant removal from the simulation domain.}, author = {Shokri, Javad and Schollenberger, Theresa and An, Senyou and Flemisch, Bernd and Babaei, Masoud and Niasar, Vahid}, doi = {https://doi.org/10.1016/j.cej.2024.152000}, issn = {1385-8947}, journal = {Chemical Engineering Journal}, month = {05}, pages = 152000, title = {Upscaling the reaction rates in porous media from pore- to Darcy-scale}, url = {https://www.sciencedirect.com/science/article/pii/S1385894724034879}, volume = 493, year = 2024 }
  Link
  https://www.sciencedirect.com/science/article/pii/S1385894724034879
6. Veyskarami, M., Bringedal, C., & Helmig, R. (2024). Modeling and Analysis of Droplet Evaporation at the Interface of a Coupled Free-Flow--Porous Medium System. Transport in Porous Media. https://doi.org/10.1007/s11242-024-02123-7
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  @article{veyskarami_modeling_2024, abstract = {Evaporation of droplets formed at the interface of a coupled free-flow–porous medium system enormously affects the exchange of mass, momentum, and energy between the two domains. In this work, we develop a model to describe multiple droplets’ evaporation at the interface, in which new sets of coupling conditions including the evaporating droplets are developed to describe the interactions between the free flow and the porous medium. Employing pore-network modeling to describe the porous medium, we take the exchanges occurring on the droplet–pore and droplet–free-flow interfaces into account. In this model, we describe the droplet evaporation as a diffusion-driven process, where vapor from the droplet surface diffuses into the surrounding free flow due to the concentration gradient. To validate the model, we compare the simulation results for the evaporation of a single droplet in a channel with experimental data, demonstrating that our model accurately describes the evaporation process. Then, we examine the impact of free-flow and porous medium properties on droplet evaporation. The results show that, among other factors, velocity and relative humidity in the free-flow domain, as well as pore temperature in the porous medium, play key roles in the droplet evaporation process.}, author = {Veyskarami, Maziar and Bringedal, Carina and Helmig, Rainer}, doi = {10.1007/s11242-024-02123-7}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {10}, title = {Modeling and Analysis of Droplet Evaporation at the Interface of a Coupled Free-Flow--Porous Medium System}, url = {https://doi.org/10.1007/s11242-024-02123-7}, year = 2024 }
  Link
  https://doi.org/10.1007/s11242-024-02123-7
7. Schneider, J., Kiemle, S., Heck, K., Rothfuss, Y., Braud, I., Helmig, R., & Vanderborght, J. (2024). Analysis of experimental and simulation data of evaporation-driven isotopic fractionation in unsaturated porous media. Vadose Zone Journal, 23, Article 5. https://doi.org/10.1002/vzj2.20363
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  @article{https://doi.org/10.1002/vzj2.20363, abstract = {Abstract Stable water isotopologs can add valuable information to the understanding of evaporation processes. The identification of the evaporation front from isotopolog concentration depth profiles under very dry soil conditions is of particular interest. We compared two different models that describe isotopolog transport in a drying unsaturated porous medium: SiSPAT-Isotope and DuMux. In DuMux, the medium can dry out completely whereas in SiSPAT-Isotope, drying is limited to the residual water saturation. We evaluated the impact of residual water saturation on simulated isotopic concentration. For a low residual water saturation, both models simulated similar isotopolog concentrations. For high residual water saturation, SiSPAT-Isotope simulated considerably lower concentrations than DuMux. This is attributed to the buffering of changes in isotopolog concentrations by the residual water in SiSPAT-Isotope and an additional enrichment due to evaporation of residual water in DuMux. Additionally, we present a comparison between high-frequency experimental data and model simulations. We found that diffusive transport processes in the laminar boundary layer and in the dried-out surface soil layer need to be represented correctly to reproduce the observed downward movement of the evaporation front and the associated peak of isotopolog enrichment. Artificially increasing the boundary layer thickness to reproduce a decrease in evaporation rate leads to incorrect simulation of the location of the evaporation front and isotopolog concentration profile.}, author = {Schneider, Jana and Kiemle, Stefanie and Heck, Katharina and Rothfuss, Youri and Braud, Isabelle and Helmig, Rainer and Vanderborght, Jan}, doi = {https://doi.org/10.1002/vzj2.20363}, eprint = {https://acsess.onlinelibrary.wiley.com/doi/pdf/10.1002/vzj2.20363}, journal = {Vadose Zone Journal}, month = {07}, number = 5, pages = {e20363}, title = {Analysis of experimental and simulation data of evaporation-driven isotopic fractionation in unsaturated porous media}, url = {https://acsess.onlinelibrary.wiley.com/doi/abs/10.1002/vzj2.20363}, volume = 23, year = 2024 }
  Link
  https://acsess.onlinelibrary.wiley.com/doi/abs/10.1002/vzj2.20363
8. Schneider, M., & Koch, T. (2024). Stable and locally mass- and momentum-conservative control-volume finite-element schemes for the Stokes problem. Computer Methods in Applied Mechanics and Engineering, 420, 116723. https://doi.org/10.1016/j.cma.2023.116723
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  @article{SCHNEIDER2024116723, abstract = {We introduce new control-volume finite-element discretization schemes suitable for solving the Stokes problem. Within a common framework, we present different approaches for constructing such schemes. The first and most established strategy employs a non-overlapping partitioning into control volumes. The second represents a new idea by splitting into two sets of control volumes, the first set yielding a partition of the domain and the second containing the remaining overlapping control volumes required for stability. The third represents a hybrid approach where finite volumes are combined with finite elements based on a hierarchical splitting of the ansatz space. All approaches are based on typical finite element function spaces but yield locally mass and momentum conservative discretization schemes that can be interpreted as finite volume schemes. We apply all strategies to the inf-sub stable MINI finite-element pair. Various test cases, including convergence tests and the numerical observation of the boundedness of the number of preconditioned Krylov solver iterations, as well as more complex scenarios of flow around obstacles or through a three-dimensional vessel bifurcation, demonstrate the stability and robustness of the schemes.}, author = {Schneider, Martin and Koch, Timo}, doi = {https://doi.org/10.1016/j.cma.2023.116723}, issn = {0045-7825}, journal = {Computer Methods in Applied Mechanics and Engineering}, pages = 116723, title = {Stable and locally mass- and momentum-conservative control-volume finite-element schemes for the Stokes problem}, url = {https://www.sciencedirect.com/science/article/pii/S0045782523008460}, volume = 420, year = 2024 }
  Link
  https://www.sciencedirect.com/science/article/pii/S0045782523008460
9. Chen, Z., Tian, Y., & Hu, L. (2024). Experimental investigation on heat and moisture transfer of propylene glycol-mixed steam in porous media. Journal of Contaminant Hydrology, 104468. https://doi.org/10.1016/j.jconhyd.2024.104468
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  @article{chen2024experimental, author = {Chen, Zhixin and Tian, Yan and Hu, Liming}, doi = {https://doi.org/10.1016/j.jconhyd.2024.104468}, journal = {Journal of Contaminant Hydrology}, pages = 104468, publisher = {Elsevier}, title = {Experimental investigation on heat and moisture transfer of propylene glycol-mixed steam in porous media}, year = 2024 }
10. Schollenberger, T., von Wolff, L., Bringedal, C., Pop, I. S., Rohde, C., & Helmig, R. (2024). Investigation of Different Throat Concepts for Precipitation Processes in Saturated Pore-Network Models. Transport in Porous Media, 151, Article 14. https://doi.org/10.1007/s11242-024-02125-5
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  @article{schollenberger_investigation_2024, abstract = {The development of reliable mathematical models and numerical discretization methods is important for the understanding of salt precipitation in porous media, which is relevant for environmental problems like soil salinization. Models on the pore scale are necessary to represent local heterogeneities in precipitation and to include the influence of solution-air-solid interfaces. A pore-network model for saturated flow, which includes the precipitation reaction of salt, is presented. It is implemented in the open-source simulator DuMuX. In this paper, we restrict ourselves to one-phase flow as a first step. Since the throat transmissibilities determine the flow behaviour in the pore network, different concepts for the decreasing throat transmissibility due to precipitation are investigated. We consider four concepts for the amount of precipitation in the throats. Three concepts use information from the adjacent pore bodies, and one employs a pore-throat model obtained by averaging the resolved pore-scale model in a thin-tube. They lead to different permeability developments, which are caused by the different distribution of the precipitate between the pore bodies and throats. We additionally apply two different concepts for the calculation of the transmissibility. One obtains the precipitate distribution from analytical assumptions, the other from a geometric minimization principle using a phase-field evolution equation. The two concepts do not show substantial differences for the permeability development as long as simple pore-throat geometries are used. Finally, advantages and disadvantages of the concepts are discussed in the context of the considered physical problem and a reasonable effort for the implementation and computational costs.}, author = {Schollenberger, Theresa and von Wolff, Lars and Bringedal, Carina and Pop, Iuliu Sorin and Rohde, Christian and Helmig, Rainer}, doi = {10.1007/s11242-024-02125-5}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {11}, number = 14, pages = {2647--2692}, title = {Investigation of Different Throat Concepts for Precipitation Processes in Saturated Pore-Network Models}, url = {https://doi.org/10.1007/s11242-024-02125-5}, volume = 151, year = 2024 }
  Link
  https://doi.org/10.1007/s11242-024-02125-5
11. Boon, W. M., Gläser, D., Helmig, R., Weishaupt, K., & Yotov, I. (2024). A mortar method for the coupled Stokes-Darcy problem using the MAC scheme for Stokes and mixed finite elements for Darcy. Computational Geosciences, 28, Article 3. https://doi.org/10.1007/s10596-023-10267-6
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  @article{boon_mortar_2024, abstract = {A discretization method with non-matching grids is proposed for the coupled Stokes-Darcy problem that uses a mortar variable at the interface to couple the marker and cell (MAC) method in the Stokes domain with the Raviart-Thomas mixed finite element pair in the Darcy domain. Due to this choice, the method conserves linear momentum and mass locally in the Stokes domain and exhibits local mass conservation in the Darcy domain. The MAC scheme is reformulated as a mixed finite element method on a staggered grid, which allows for the proposed scheme to be analyzed as a mortar mixed finite element method. We show that the discrete system is well-posed and derive a priori error estimates that indicate first order convergence in all variables. The system can be reduced to an interface problem concerning only the mortar variables, leading to a non-overlapping domain decomposition method. Numerical examples are presented to illustrate the theoretical results and the applicability of the method.}, author = {Boon, Wietse M. and Gläser, Dennis and Helmig, Rainer and Weishaupt, Kilian and Yotov, Ivan}, doi = {10.1007/s10596-023-10267-6}, issn = {1573-1499}, journal = {Computational Geosciences}, month = {06}, number = 3, pages = {413--430}, title = {A mortar method for the coupled Stokes-Darcy problem using the MAC scheme for Stokes and mixed finite elements for Darcy}, url = {https://doi.org/10.1007/s10596-023-10267-6}, volume = 28, year = 2024 }
  Link
  https://doi.org/10.1007/s10596-023-10267-6
2023
1. Tatomir, A., Gao, H., Abdullah, H., Pötzl, C., Karadimitriou, N., Steeb, H., Licha, T., Class, H., Helmig, R., & Sauter, M. (2023). Estimation of Capillary-Associated NAPL-Water Interfacial Areas for Unconsolidated Porous Media by Kinetic Interface Sensitive (KIS) Tracer Method. Water Resources Research, 59, Article 12. https://doi.org/10.1029/2023WR035387
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  @article{https://doi.org/10.1029/2023WR035387, abstract = {Abstract By employing kinetic interface sensitive (KIS) tracers, we investigate three different types of glass-bead materials and three natural porous media systems to quantitatively characterize the influence of the porous-medium grain-, pore-size and texture on the specific capillary-associated interfacial area (FIFA) between an organic liquid and water. By interpreting the breakthrough curves (BTCs) of the reaction product of the KIS tracer hydrolysis, we obtain a relation for the specific IFA and wetting phase saturation. The immiscible displacement process coupled with the reactive tracer transport across the fluid–fluid interface is simulated with a Darcy-scale numerical model. Linear relations between the specific capillary-associated FIFA and the inverse mean grain diameter can be established for measurements with glass beads and natural soils. We find that the grain size has minimal effect on the capillary-associated FIFA for unconsolidated porous media formed by glass beads. Conversely, for unconsolidated porous media formed by natural soils, the capillary-associated FIFA linearly increases with the inverse mean grain diameter, and it is much larger than that from glass beads. This indicates that the surface roughness and the irregular shape of the grains can cause the capillary-associated FIFA to increase. The results are also compared with the data collected from literature, measured with high resolution microtomography and partitioning tracer methods. Our study considerably expands the applicability range of the KIS tracers and enhances the confidence in the robustness of the method.}, author = {Tatomir, Alexandru and Gao, Huhao and Abdullah, Hiwa and Pötzl, Christopher and Karadimitriou, Nikolaos and Steeb, Holger and Licha, Tobias and Class, Holger and Helmig, Rainer and Sauter, Martin}, doi = {https://doi.org/10.1029/2023WR035387}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2023WR035387}, journal = {Water Resources Research}, month = {12}, note = {e2023WR035387 2023WR035387}, number = 12, pages = {e2023WR035387}, title = {Estimation of Capillary-Associated NAPL-Water Interfacial Areas for Unconsolidated Porous Media by Kinetic Interface Sensitive (KIS) Tracer Method}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2023WR035387}, volume = 59, year = 2023 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2023WR035387
2. Class, H., Keim, L., Schirmer, L., Strauch, B., Wendel, K., & Zimmer, M. (2023). Seasonal Dynamics of Gaseous CO2 Concentrations in a Karst Cave Correspond with Aqueous Concentrations in a Stagnant Water Column. Geosciences, 13, 51. https://doi.org/10.3390/geosciences13020051
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  @article{paper-2023-class-tiefenhoehle, abstract = {Dissolved CO2 in karst water is the key driving force of karstification. Replenishment of CO2 concentrations in karst water occurs by meteoric water that percolates through the vadose zone, where CO2 produced from microbial activity is dissolved. CO2 can thus be transported with the percolating water or in the gas phase due to ventilation in karst systems. We measured seasonally fluctuating CO2 concentrations in the air of a karst cave and their influence on aqueous CO2 con- centrations in different depths of a stagnant water column. The observed data were compared to numerical simulations. The data give evidence that density-driven enhanced dissolution of gaseous CO2 at the karst water table is the driving force for a fast increase of aqueous CO2 during periods of high gaseous concentrations in the cave, whereas during periods of lower gaseous concentrations, the decline of aqueous CO2 is limited to shallow water depths in the order of 1 m. This is significant because density-driven CO2 dissolution has not been previously considered relevant for karst hy- drology in the literature. Attempts at reproducing the measured aqueous CO2 concentrations with numerical modeling revealed challenges related to computational demands, discretization, and the high sensitivity of the processes to tiny density gradients.}, author = {Class, Holger and Keim, Leon and Schirmer, Larissa and Strauch, Bettina and Wendel, Kai and Zimmer, Martin}, doi = {10.3390/geosciences13020051}, journal = {Geosciences}, pages = 51, title = {Seasonal Dynamics of Gaseous CO2 Concentrations in a Karst Cave Correspond with Aqueous Concentrations in a Stagnant Water Column}, url = {https://www.mdpi.com/2076-3263/13/2/51/pdf}, volume = 13, year = 2023 }
  Link
  https://www.mdpi.com/2076-3263/13/2/51/pdf
3. Veyskarami, M., Michalkowski, C., Bringedal, C., & Helmig, R. (2023). Droplet Formation, Growth and Detachment at the Interface of a Coupled Free-FLow--Porous Medium System: A New Model Development and Comparison. Transport in Porous Media, 149, 389–419. https://doi.org/10.1007/s11242-023-01944-2
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  @article{veyskarami2023droplet, author = {Veyskarami, Maziar and Michalkowski, Cynthia and Bringedal, Carina and Helmig, Rainer}, doi = {10.1007/s11242-023-01944-2}, journal = {Transport in Porous Media}, month = {05}, pages = {389–419}, publisher = {Springer}, title = {Droplet Formation, Growth and Detachment at the Interface of a Coupled Free-FLow--Porous Medium System: A New Model Development and Comparison}, url = {https://link.springer.com/article/10.1007/s11242-023-01944-2}, volume = 149, year = 2023 }
  Link
  https://link.springer.com/article/10.1007/s11242-023-01944-2
4. Wu, H., Veyskarami, M., Schneider, M., & Helmig, R. (2023). A New Fully Implicit Two-Phase Pore-Network Model by Utilizing Regularization Strategies. Transport in Porous Media. https://doi.org/10.1007/s11242-023-02031-2
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  @article{wu_new_2023, abstract = {In this paper, we address the expensive computational cost resulting from limited time-step sizes during numerical simulations of two-phase flow in porous media using dynamic pore-network models. To overcome this issue, we propose a numerical method for dynamic pore-network models using a fully implicit approach. The proposed method introduces a regularization strategy considering the historical fluid configuration at the pore throat, which smooths the discontinuities in local conductivity caused by invasion and snap-off events. The results demonstrate the superiority of the proposed method in terms of accuracy, efficiency and consistency in comparison with other numerical schemes. With similar computational cost, determined by time-step sizes and number of Newton iterations, the developed method in this work yields more accurate results compared to similar schemes presented in the literature. Additionally, our results highlight the enhanced robustness of the our scheme, as it exhibits reduced sensitivity to variations in time-step sizes.}, author = {Wu, Hanchuan and Veyskarami, Maziar and Schneider, Martin and Helmig, Rainer}, doi = {10.1007/s11242-023-02031-2}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {10}, title = {A New Fully Implicit Two-Phase Pore-Network Model by Utilizing Regularization Strategies}, url = {https://doi.org/10.1007/s11242-023-02031-2}, year = 2023 }
  Link
  https://doi.org/10.1007/s11242-023-02031-2
5. Kiemle, S., Heck, K., Coltman, E., & Helmig, R. (2023). Stable Water Isotopologue Fractionation During Soil-Water Evaporation: Analysis Using a Coupled Soil-Atmosphere Model. Water Resources Research, 59, Article 2. https://doi.org/10.1029/2022WR032385
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  @article{https://doi.org/10.1029/2022WR032385, abstract = {Abstract The atmosphere-soil system forms a highly coupled system, which makes key processes such as evaporation complex to analyze as the mass, energy, and momentum transfer is influenced by both domains. To enhance the understanding of evaporation processes from soils, stable water isotopologues are suitable tools to trace water movement within these systems as heavier isotopologues enrich in the residual liquid phase. Due to the complex coupled processes involved in simulating soil-water evaporation accurately, quantifying fractionation during flow and transport processes at the soil-atmosphere interface remains an open research area. In this work, we present a multi-phase multi-component transport model that resolves flow through the near-surface atmosphere and the soil, and models transport and fractionation of the stable water isotopologues using the numerical simulation environment DuMux. Using this coupled model, we simulate transport and fractionation processes of stable water isotopologues in soils and the atmosphere by solving compositional flow equations and by using suitable coupling conditions at the soil-atmosphere interface instead of commonly used parameterization. In a series of examples of evaporation from bare soil, the transport and distribution of stable water isotopologues are evaluated numerically with varied conditions and assumptions, including different atmospheric conditions (turbulent/laminar flow, wind speed) and their impact on the spatial and temporal distribution of the isotopic composition. Building on these results, we observed how the enrichment of the isotopologues in soil is linked with the different stages of the evaporation process. A qualitative study is conducted to verify single fractionation processes in our approach.}, author = {Kiemle, Stefanie and Heck, Katharina and Coltman, Edward and Helmig, Rainer}, doi = {https://doi.org/10.1029/2022WR032385}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2022WR032385}, issn = {1944-7973}, journal = {Water Resources Research}, month = {02}, note = {e2022WR032385 2022WR032385}, number = 2, pages = {e2022WR032385}, publisher = {American Geophysical Union (AGU)}, title = {Stable Water Isotopologue Fractionation During Soil-Water Evaporation: Analysis Using a Coupled Soil-Atmosphere Model}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2022WR032385}, volume = 59, year = 2023 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2022WR032385
6. Mohammadi, F., Eggenweiler, E., Flemisch, B., Oladyshkin, S., Rybak, I., Schneider, M., & Weishaupt, K. (2023). A surrogate-assisted uncertainty-aware Bayesian validation framework and its application to coupling free flow and porous-medium flow. Computational Geosciences, 27, Article 4. https://doi.org/10.1007/s10596-023-10228-z
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  @article{mohammadi_surrogate-assisted_2023, abstract = {Existing model validation studies in geoscience often disregard or partly account for uncertainties in observations, model choices, and input parameters. In this work, we develop a statistical framework that incorporates a probabilistic modeling technique using a fully Bayesian approach to perform a quantitative uncertainty-aware validation. A Bayesian perspective on a validation task yields an optimal bias-variance trade-off against the reference data. It provides an integrative metric for model validation that incorporates parameter and conceptual uncertainty. Additionally, a surrogate modeling technique, namely Bayesian Sparse Polynomial Chaos Expansion, is employed to accelerate the computationally demanding Bayesian calibration and validation. We apply this validation framework to perform a comparative evaluation of models for coupling a free flow with a porous-medium flow. The correct choice of interface conditions and proper model parameters for such coupled flow systems is crucial for physically consistent modeling and accurate numerical simulations of applications. We develop a benchmark scenario that uses the Stokes equations to describe the free flow and considers different models for the porous-medium compartment and the coupling at the fluid–porous interface. These models include a porous-medium model using Darcy’s law at the representative elementary volume scale with classical or generalized interface conditions and a pore-network model with its related coupling approach. We study the coupled flow problems’ behaviors considering a benchmark case, where a pore-scale resolved model provides the reference solution. With the suggested framework, we perform sensitivity analysis, quantify the parametric uncertainties, demonstrate each model’s predictive capabilities, and make a probabilistic model comparison.}, author = {Mohammadi, Farid and Eggenweiler, Elissa and Flemisch, Bernd and Oladyshkin, Sergey and Rybak, Iryna and Schneider, Martin and Weishaupt, Kilian}, doi = {10.1007/s10596-023-10228-z}, issn = {1573-1499}, journal = {Computational Geosciences}, month = {08}, number = 4, pages = {663--686}, title = {A surrogate-assisted uncertainty-aware Bayesian validation framework and its application to coupling free flow and porous-medium flow}, url = {https://doi.org/10.1007/s10596-023-10228-z}, volume = 27, year = 2023 }
  Link
  https://doi.org/10.1007/s10596-023-10228-z
7. Lee, D., Weinhardt, F., Hommel, J., Piotrowski, J., Class, H., & Steeb, H. (2023). Machine learning assists in increasing the time resolution of X-ray computed tomography applied to mineral precipitation in porous media. Scientific Reports, 13, 10529. https://doi.org/10.1038/s41598-023-37523-0
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  @article{Leeetal2023, abstract = {Many subsurface engineering technologies or natural processes cause porous medium properties, such as porosity or permeability, to evolve in time. Studying and understanding such processes on the pore scale is strongly aided by visualizing the details of geometric and morphological changes in the pores. For realistic 3D porous media, X-Ray Computed Tomography (XRCT) is the method of choice for visualization. However, the necessary high spatial resolution requires either access to limited high-energy synchrotron facilities or data acquisition times which are considerably longer (e.g. hours) than the time scales of the processes causing the pore geometry change (e.g. minutes). Thus, so far, conventional benchtop XRCT technologies are often too slow to allow for studying dynamic processes. Interrupting experiments for performing XRCT scans is also in many instances no viable approach. We propose a novel workflow for investigating dynamic precipitation processes in porous media systems in 3D using a convent.}, author = {Lee, Dongwon and Weinhardt, Felix and Hommel, Johannes and Piotrowski, Joseph and Class, Holger and Steeb, Holger}, doi = {10.1038/s41598-023-37523-0}, journal = {Scientific Reports}, pages = 10529, title = {Machine learning assists in increasing the time resolution of X-ray computed tomography applied to mineral precipitation in porous media}, url = {https://doi.org/10.1038/s41598-023-37523-0}, volume = 13, year = 2023 }
  Link
  https://doi.org/10.1038/s41598-023-37523-0
8. Ackermann, S., Fest-Santini, S., Veyskarami, M., Helmig, R., & Santini, M. (2023). Experimental validation of a coupling concept for drop formation and growth onto porous materials by high-resolution X-ray imaging technique. International Journal of Multiphase Flow, 160. https://doi.org/10.1016/j.ijmultiphaseflow.2022.104371
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  @article{paper-2023-ackermann-experimentalvalidation, abstract = {Droplets formed on the hydrophobic surface of a porous medium exposed to a cross-flowing gas stream have a strong influence on the mass, momentum, and energy exchange across the porous interface, being of importance in several physical systems and engineering applications, like fuel cells. However, the fluid displacement front is highly complex at the pore-scale, since it is characterized by the surface wettability and a contact angle variation along the triple line. Furthermore, the droplet formation is affected by the pore geometry and the surface wettability. These result in a challenging multi-phase scenario with controversial literature, and few studies consider the detailed mechanism of droplet formation on the surface of the porous medium. In this work, two multi-scale simulations for the emerging water droplet from a single hydrophobic capillary pore opening into the gas phase are validated by a benchmark experiment with the help of a high-resolution X-ray imaging technique to characterize the droplet growing. A three-domain approach (gaseous free flow, interface and porous medium, FIP) was compared with a two-domain approach (based on a free-flow and the porous medium, FP). Whereas the three-domain approach introduces two sets of coupling conditions, one for the free flow-interface and one for the interface-porous medium, the two-domain approach introduces only one set of coupling connections for describing the interaction between the domains. In both approaches, droplet formation and growth alter the coupling conditions between the domains. While the FIP approach treats the porous medium as a continuous matter, it is resolved discretely with the help of a pore network in the FP approach. Both approaches show good agreements with the experimental observations and high correspondences for the drop volume, radii and contact angle evolution. The proposed models provide a base for future developments and help to gain a better insight about the impact of the droplet formation on the interface in a coupled free flow-porous medium system.}, author = {Ackermann, Sina and Fest-Santini, Stephanie and Veyskarami, Maziar and Helmig, Rainer and Santini, Maurizio}, doi = {https://doi.org/10.1016/j.ijmultiphaseflow.2022.104371}, journal = {International Journal of Multiphase Flow}, month = {01}, page = {104371}, title = {Experimental validation of a coupling concept for drop formation and growth onto porous materials by high-resolution X-ray imaging technique}, url = {https://www.sciencedirect.com/science/article/pii/S0301932222003305}, volume = 160, year = 2023 }
  Link
  https://www.sciencedirect.com/science/article/pii/S0301932222003305
9. Gläser, D., Koch, T., & Flemisch, B. (2023). GridFormat: header-only C++-library for grid file I/O. Journal of Open Source Software, 8, Article 90. https://doi.org/10.21105/joss.05778
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  @article{paper-2023-gridformat, author = {Gläser, Dennis and Koch, Timo and Flemisch, Bernd}, doi = {10.21105/joss.05778}, journal = {Journal of Open Source Software}, month = {10}, number = 90, pages = 5778, publisher = {The Open Journal}, title = {GridFormat: header-only C++-library for grid file I/O}, url = {https://doi.org/10.21105/joss.05778}, volume = 8, year = 2023 }
  Link
  https://doi.org/10.21105/joss.05778
10. Schneider, M., Gläser, D., Weishaupt, K., Coltman, E., Flemisch, B., & Helmig, R. (2023). Coupling staggered-grid and vertex-centered finite-volume methods for coupled porous-medium free-flow problems. Journal of Computational Physics, 482, 112042. https://doi.org/10.1016/j.jcp.2023.112042
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  @article{SCHNEIDER2023112042, abstract = {A new discretization approach for coupled free and porous-medium flows is introduced, which uses a finite-volume staggered-grid method for the discretization of the Navier-Stokes equations in the free-flow subdomain, while a vertex-centered finite-volume method is employed in the porous medium. The latter allows for the use of unstructured grids to discretize the porous medium, and the presented method is capable of handling non-matching grids at the interface. Moreover, the basis functions of the vertex-centered finite-volume method, with their degrees of freedom located at the interface, allow for an accurate evaluation of the coupling terms and of additional nonlinear velocity-dependent terms in the porous medium. The available advantages of this coupling method are investigated in a series of tests: a convergence test for various grid types, an evaluation of the implementation of the coupling conditions, and an example using the velocity-dependent Forchheimer term in the porous-medium subdomain.}, author = {Schneider, Martin and Gläser, Dennis and Weishaupt, Kilian and Coltman, Edward and Flemisch, Bernd and Helmig, Rainer}, doi = {https://doi.org/10.1016/j.jcp.2023.112042}, issn = {0021-9991}, journal = {Journal of Computational Physics}, month = {07}, pages = 112042, title = {Coupling staggered-grid and vertex-centered finite-volume methods for coupled porous-medium free-flow problems}, url = {https://www.sciencedirect.com/science/article/pii/S0021999123001377}, volume = 482, year = 2023 }
  Link
  https://www.sciencedirect.com/science/article/pii/S0021999123001377
11. Kohlhaas, R., Kröker, I., Oladyshkin, S., & Nowak, W. (2023). Gaussian active learning on multi-resolution arbitrary polynomial chaos emulator: concept for bias correction, assessment of surrogate reliability and its application to the carbon dioxide benchmark. Computational Geosciences, 27, Article 3. https://doi.org/10.1007/s10596-023-10199-1
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  @article{kohlhaas_gaussian_2023, abstract = {Surrogate models are widely used to improve the computational efficiency in various geophysical simulation problems by reducing the number of model runs. Conventional one-layer surrogate representations are based on global (e.g. polynomial chaos expansion, PCE) or on local kernels (e.g., Gaussian process emulator, GPE). Global representations omit some details, while local kernels require more model runs. The existing multi-resolution PCE is a promising hybrid: it is a global representation with local refinement. However, it can not (yet) estimate the uncertainty of the resulting surrogate, which techniques like the GPE can do. We propose to join multi-resolution PCE and GPE s into a joint surrogate framework to get the best out of both worlds. By doing so, we correct the surrogate bias and assess the remaining uncertainty of the surrogate itself. The resulting multi-resolution emulator offers a pathway for several active learning strategies to improve the surrogate at acceptable computational costs, compared to the existing PCE-kriging approach it adds the multi-resolution aspect. We analyze the performance of a multi-resolution emulator and a plain GPE using didactic test cases and a CO2 benchmark, that is representative of many alike problems in the geosciences. Both approaches show similar improvements during the active learning, but our multi-resolution emulator leads to much more stable results than the GPE. Overall, our suggested emulator can be seen as a generalization of multi-resolution PCE and GPE concepts that offers the possibility for active learning.}, author = {Kohlhaas, Rebecca and Kröker, Ilja and Oladyshkin, Sergey and Nowak, Wolfgang}, doi = {10.1007/s10596-023-10199-1}, issn = {1573-1499}, journal = {Computational Geosciences}, month = {06}, number = 3, pages = {369--389}, title = {Gaussian active learning on multi-resolution arbitrary polynomial chaos emulator: concept for bias correction, assessment of surrogate reliability and its application to the carbon dioxide benchmark}, url = {https://doi.org/10.1007/s10596-023-10199-1}, volume = 27, year = 2023 }
  Link
  https://doi.org/10.1007/s10596-023-10199-1
12. Chen, Z., Wang, Y., & Hu, L. (2023). Thermal desorption mechanism of n-dodecane on unsaturated clay: Experimental study and molecular dynamics simulation. Environmental Pollution, 323, 121228. https://doi.org/10.1016/j.envpol.2023.121228
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  @article{chen2023thermal, author = {Chen, Zhixin and Wang, Yijie and Hu, Liming}, doi = {https://doi.org/10.1016/j.envpol.2023.121228}, journal = {Environmental Pollution}, pages = 121228, publisher = {Elsevier}, title = {Thermal desorption mechanism of n-dodecane on unsaturated clay: Experimental study and molecular dynamics simulation}, volume = 323, year = 2023 }
13. Boon, W. M., Gläser, D., Helmig, R., & Yotov, I. (2023). Flux-mortar mixed finite element methods with multipoint flux approximation. Computer Methods in Applied Mechanics and Engineering, 405, 115870. https://doi.org/10.1016/j.cma.2022.115870
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  @article{paper-2023-boon-flux-mortar, abstract = {The flux-mortar mixed finite element method was recently developed in Boon et al. (2022) for a general class of domain decomposition saddle point problems on non-matching grids. In this work we develop the method for Darcy flow using the multipoint flux approximation as the subdomain discretization. The subdomain problems involve solving positive definite cell-centered pressure systems. The normal flux on the subdomain interfaces is the mortar coupling variable, which plays the role of a Lagrange multiplier to impose weakly continuity of pressure. We present well-posedness and error analysis based on reformulating the method as a mixed finite element method with a quadrature rule. We develop a non-overlapping domain decomposition algorithm for the solution of the resulting algebraic system that reduces it to an interface problem for the flux-mortar, as well as an efficient interface preconditioner. A series of numerical experiments is presented illustrating the performance of the method on general grids, including applications to flow in complex porous media.}, author = {Boon, Wietse M. and Gläser, Dennis and Helmig, Rainer and Yotov, Ivan}, doi = {10.1016/j.cma.2022.115870}, issn = {0045-7825}, journal = {Computer Methods in Applied Mechanics and Engineering}, pages = 115870, title = {Flux-mortar mixed finite element methods with multipoint flux approximation}, url = {https://www.sciencedirect.com/science/article/pii/S004578252200826X}, volume = 405, year = 2023 }
  Link
  https://www.sciencedirect.com/science/article/pii/S004578252200826X
14. Nissler, E., Scherrer, S., Class, H., Müller, T., Hermannspan, M., Osmancevic, E., & Haslauer, C. (2023). Heat transport from atmosphere through the subsurface to drinking-water supply pipes. Vadose Zone Journal. https://doi.org/10.1002/vzj2.20286
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  @article{Nissler_2023, author = {Nissler, Elisabeth and Scherrer, Samuel and Class, Holger and Müller, Tanja and Hermannspan, Mark and Osmancevic, Esad and Haslauer, Claus}, doi = {10.1002/vzj2.20286}, issn = {1539-1663}, journal = {Vadose Zone Journal}, month = {11}, organization = {Institut für Wasser- und Umweltsystemmodellierung}, publisher = {Wiley}, school = {Universität Stuttgart}, title = {Heat transport from atmosphere through the subsurface to drinking-water supply pipes}, url = {http://dx.doi.org/10.1002/vzj2.20286}, year = 2023 }
  Link
  http://dx.doi.org/10.1002/vzj2.20286
15. Chen, Z., & Hu, L. (2023). Adsorption behavior of benzene on clay mineral surfaces at different temperatures and air humidity based on molecular simulation. Applied Clay Science, 243, 107068. https://doi.org/10.1016/j.clay.2023.107068
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  @article{chen2023adsorption, author = {Chen, Zhixin and Hu, Liming}, doi = {https://doi.org/10.1016/j.clay.2023.107068}, journal = {Applied Clay Science}, pages = 107068, publisher = {Elsevier}, title = {Adsorption behavior of benzene on clay mineral surfaces at different temperatures and air humidity based on molecular simulation}, volume = 243, year = 2023 }
16. Wu, Z., Chen, Z., Hu, L., Wang, R., & Zhang, X. (2023). Effect of conditioning schemes on mechanical properties of EPB shield soil. Transportation Geotechnics, 42, 101058. https://doi.org/10.1016/j.trgeo.2023.101058
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  @article{wu2023effect, author = {Wu, Zhixiong and Chen, Zhixin and Hu, Liming and Wang, Rui and Zhang, Xuan}, doi = {https://doi.org/10.1016/j.trgeo.2023.101058}, journal = {Transportation Geotechnics}, pages = 101058, publisher = {Elsevier}, title = {Effect of conditioning schemes on mechanical properties of EPB shield soil}, volume = 42, year = 2023 }
17. Wang, Y., Chen, Z., & Hu, L. (2023). Determining the geometric surface area of mesoporous materials. The Journal of Physical Chemistry C, 127, Article 9. https://doi.org/10.1021/acs.jpcc.3c00162
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  @article{wang2023determining, author = {Wang, Yijie and Chen, Zhixin and Hu, Liming}, doi = {https://doi.org/10.1021/acs.jpcc.3c00162}, journal = {The Journal of Physical Chemistry C}, number = 9, pages = {4799--4807}, publisher = {ACS Publications}, title = {Determining the geometric surface area of mesoporous materials}, volume = 127, year = 2023 }
2022
1. Lunowa, S. B., Mascini, A., Bringedal, C., Bultreys, T., Cnudde, V., & Pop, I. S. (2022). Dynamic Effects during the Capillary Rise of Fluids in Cylindrical Tubes. Langmuir, 38, Article 5. https://doi.org/10.1021/acs.langmuir.1c02680
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  @article{lunowa2022langmuir, abstract = { The mathematical models for the capillary-driven flow of fluids in tubes typically assume a static contact angle at the fluid–air contact line on the tube walls. However, the dynamic evolution of the fluid–air interface is an important feature during capillary rise. Furthermore, inertial effects are relevant at early times and may lead to oscillations. To incorporate and quantify the different effects, a fundamental description of the physical processes within the tube is used to derive an upscaled model of capillary-driven flow in circular cylindrical tubes. The upscaled model extends the classical Lucas–Washburn model by incorporating a dynamic contact angle and slip. It is then further extended to account for inertial effects. Finally, the solutions of the different models are compared to experimental data. In contrast to the Lucas–Washburn model, the models with dynamic contact angle match well the experimental data, both the rise height and the contact angle, even at early times. The models have a free parameter through the dynamic contact angle description, which is fitted using the experimental data. The findings here suggest that this parameter depends only on the properties of the fluid but is independent of geometrical features, such as the tube radius. Therefore, the presented models can predict the capillary-driven flow in tubular systems upon knowledge of the underlying dynamic contact-angle relation. }, author = {Lunowa, Stephan B. and Mascini, Arjen and Bringedal, Carina and Bultreys, Tom and Cnudde, Veerle and Pop, Iuliu Sorin}, doi = {10.1021/acs.langmuir.1c02680}, eprint = {https://doi.org/10.1021/acs.langmuir.1c02680}, journal = {Langmuir}, number = 5, pages = {1680-1688}, title = {Dynamic Effects during the Capillary Rise of Fluids in Cylindrical Tubes}, url = {https://doi.org/10.1021/acs.langmuir.1c02680}, volume = 38, year = 2022 }
  Link
  https://doi.org/10.1021/acs.langmuir.1c02680
2. Scholz, L., & Bringedal, C. (2022). A Three-Dimensional Homogenization Approach for Effective Heat Transport in Thin Porous Media. Transport in Porous Media, 141, Article 3. https://doi.org/10.1007/s11242-022-01746-y
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  @article{scholzbringedal2022, author = {Scholz, Lena and Bringedal, Carina}, doi = {10.1007/s11242-022-01746-y}, journal = {Transport in Porous Media}, number = 3, pages = {737-769}, publisher = {Springer}, title = {A Three-Dimensional Homogenization Approach for Effective Heat Transport in Thin Porous Media}, volume = 141, year = 2022 }
3. Bringedal, C., Schollenberger, T., Pieters, G. J. M., van Duijn, C. J., & Helmig, R. (2022). Evaporation-Driven Density Instabilities in Saturated Porous Media. Transport in Porous Media, 143, Article 2. https://doi.org/10.1007/s11242-022-01772-w
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  @article{bringedal_evaporation-driven_2022, abstract = {Soil salinization is a major cause of soil degradation and hampers plant growth. For soils saturated with saline water, the evaporation of water induces accumulation of salt near the top of the soil. The remaining liquid gets an increasingly larger density due to the accumulation of salt, giving a gravitationally unstable situation, where instabilities in the form of fingers can form. These fingers can, hence, lead to a net downward transport of salt. We here investigate the appearance of these fingers through a linear stability analysis and through numerical simulations. The linear stability analysis gives criteria for onset of instabilities for a large range of parameters. Simulations using a set of parameters give information also about the development of the fingers after onset. With this knowledge, we can predict whether and when the instabilities occur, and their effect on the salt concentration development near the top boundary.}, author = {Bringedal, Carina and Schollenberger, Theresa and Pieters, G. J. M. and van Duijn, C. J. and Helmig, Rainer}, doi = {10.1007/s11242-022-01772-w}, issn = {1573-1634}, journal = {Transport in Porous Media}, language = {en}, month = {06}, number = 2, pages = {297--341}, title = {Evaporation-{Driven} {Density} {Instabilities} in {Saturated} {Porous} {Media}}, url = {https://doi.org/10.1007/s11242-022-01772-w}, urldate = {2022-07-08}, volume = 143, year = 2022 }
  Link
  https://doi.org/10.1007/s11242-022-01772-w
4. Michalkowski, C., Weishaupt, K., Schleper, V., & Helmig, R. (2022). Modeling of Two Phase Flow in a Hydrophobic Porous Medium Interacting with a Hydrophilic Structure. Transport in Porous Media, 144, Article 2. https://doi.org/10.1007/s11242-022-01816-1
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  @article{michalkowski_modeling_2022, abstract = {Fluid flow through layered materials with different wetting behavior is observed in a wide range of applications in biological, environmental and technical systems. Therefore, it is necessary to understand the occuring transport mechanisms of the fluids at the interface between the layered constituents. Of special interest is the water transport in polymer electrolyte membrane fuel cells. Here, it is necessary to understand the transport mechanisms of water throughout the cell constituents especially on the cathode side, where the excess water has to be removed. This is crucial to choose optimal operating conditions and improve the overall cell performance. Pore-scale modeling of gas diffusion layers (GDLs) and gas distributor has been established as a favorable technique to investigate the ongoing processes. Investigating the interface between the hydrophobic porous GDL and the hydrophilic gas distributor, a particular challenge is the combination and interaction of the different material structures and wetting properties at the interface and its influence on the flow. In this paper, a modeling approach is presented which captures the influence of a hydrophilic domain on the flow in a hydrophobic porous domain at the interface between the two domains. A pore-network model is used as the basis of the developed concept which is extended to allow the modeling of mixed-wet interactions at the interface. The functionality of the model is demonstrated using basic example configurations with one and several interface pores and it is applied to a realistic GDL representation in contact with a channel-land structured gas distributor.}, author = {Michalkowski, Cynthia and Weishaupt, Kilian and Schleper, Veronika and Helmig, Rainer}, doi = {10.1007/s11242-022-01816-1}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {09}, number = 2, pages = {481--506}, title = {Modeling of Two Phase Flow in a Hydrophobic Porous Medium Interacting with a Hydrophilic Structure}, url = {https://doi.org/10.1007/s11242-022-01816-1}, volume = 144, year = 2022 }
  Link
  https://doi.org/10.1007/s11242-022-01816-1
5. Weinhardt, F., Deng, J., Hommel, J., Vahid Dastjerdi, S., Gerlach, R., Steeb, H., & Class, H. (2022). Spatiotemporal Distribution of Precipitates and Mineral Phase Transition During Biomineralization Affect Porosity–Permeability Relationships. Transport in Porous Media, 143, Article 2. https://doi.org/10.1007/s11242-022-01782-8
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  @article{weinhardt_spatiotemporal_2022, abstract = {Enzymatically induced calcium carbonate precipitation is a promising geotechnique with the potential, for example, to seal leakage pathways in the subsurface or to stabilize soils. Precipitation of calcium carbonate in a porous medium reduces the porosity and, consequently, the permeability. With pseudo-2D microfluidic experiments, including pressure monitoring and, for visualization, optical microscopy and X-ray computed tomography, pore-space alterations were reliably related to corresponding hydraulic responses. The study comprises six experiments with two different pore structures, a simple, quasi-1D structure, and a 2D structure. Using a continuous injection strategy with either constant or step-wise reduced flow rates, we identified key mechanisms that significantly influence the relationship between porosity and permeability. In the quasi-1D structure, the location of precipitates is more relevant to the hydraulic response (pressure gradients) than the overall porosity change. In the quasi-2D structure, this is different, because flow can bypass locally clogged regions, thus leading to steadier porosity–permeability relationships. Moreover, in quasi-2D systems, during continuous injection, preferential flow paths can evolve and remain open. Classical porosity–permeability power-law relationships with constant exponents cannot adequately describe this phenomenon. We furthermore observed coexistence and transformation of different polymorphs of calcium carbonate, namely amorphous calcium carbonate, vaterite, and calcite and discuss their influence on the observed development of preferential flow paths. This has so far not been accounted for in the state-of-the-art approaches for porosity–permeability relationships during calcium carbonate precipitation in porous media.}, author = {Weinhardt, Felix and Deng, Jingxuan and Hommel, Johannes and Vahid Dastjerdi, Samaneh and Gerlach, Robin and Steeb, Holger and Class, Holger}, doi = {10.1007/s11242-022-01782-8}, issn = {1573-1634}, journal = {Transport in Porous Media}, language = {en}, month = {06}, number = 2, pages = {527--549}, title = {Spatiotemporal {Distribution} of {Precipitates} and {Mineral} {Phase} {Transition} {During} {Biomineralization} {Affect} {Porosity}–{Permeability} {Relationships}}, url = {https://doi.org/10.1007/s11242-022-01782-8}, urldate = {2022-07-08}, volume = 143, year = 2022 }
  Link
  https://doi.org/10.1007/s11242-022-01782-8
6. Ghosh, T., Gujjala, Y. K., Deb, D., & Raja Sekhar, G. P. (2022). Numerical investigation of spontaneous imbibition in an anisotropic reservoir. Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 8, Article 3. https://doi.org/10.1007/s40948-022-00411-4
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  @article{ghosh_numerical_2022, abstract = {In this study, co-current spontaneous imbibition in two-dimensional reservoir formations saturated with two immiscible and incompressible fluids is investigated. A computational workbench is proposed assuming that the porosity of the medium is constant however permeability is anisotropic i.e., direction-dependent. Numerical experiments are performed for two geometrically distinct reservoir domains, namely, narrow channel and square duct. The numerical experiments reveal that the dynamics of the recovery significantly depend on the ratio of the vertical to the horizontal intrinsic permeability i.e., anisotropic ratio. Specifically, the front propagation shows a striking dependency on the anisotropy of the medium. This analysis indicates that the cross-flow behavior triggers early water breakthrough and consequently substantial amount of oil/non-wetting phase bypassing. In addition, it is noted that the onset of forced imbibition is regulated by the mean pressure distribution of the underground formation. This article develops a correlation between the oil recovery percentage (\%) and the reservoir quality index (RQI). This can predict the oil recovery trend at a particular instance for a given reservoir configuration depending on the corresponding RQI values.}, author = {Ghosh, Tufan and Gujjala, Yashwanth Kumar and Deb, Debasis and Raja Sekhar, G. P.}, doi = {10.1007/s40948-022-00411-4}, issn = {2363-8427}, journal = {Geomechanics and Geophysics for Geo-Energy and Geo-Resources}, language = {en}, month = {04}, number = 3, pages = 100, title = {Numerical investigation of spontaneous imbibition in an anisotropic reservoir}, url = {https://doi.org/10.1007/s40948-022-00411-4}, urldate = {2022-07-08}, volume = 8, year = 2022 }
  Link
  https://doi.org/10.1007/s40948-022-00411-4
7. Boon, W. M., Gläser, D., Helmig, R., & Yotov, I. (2022). Flux-Mortar Mixed Finite Element Methods on NonMatching Grids. SIAM Journal on Numerical Analysis, 60, Article 3. https://doi.org/10.1137/20M1361407
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  @article{doi:10.1137/20M1361407, abstract = { We investigate a mortar technique for mixed finite element approximations of a class of domain decomposition saddle point problems on nonmatching grids in which the variable associated with the essential boundary condition, referred to as flux, is chosen as the coupling variable. It plays the role of a Lagrange multiplier to impose weakly continuity of the variable associated with the natural boundary condition. The flux-mortar variable is incorporated with the use of a discrete extension operator. We present well-posedness and error analysis in an abstract setting under a set of suitable assumptions, followed by a nonoverlapping domain decomposition algorithm that reduces the global problem to a positive definite interface problem. The abstract theory is illustrated for Darcy flow, where the normal flux is the mortar variable used to impose continuity of pressure, and for Stokes flow, where the velocity vector is the mortar variable used to impose continuity of normal stress. In both examples, suitable discrete extension operators are developed and the assumptions from the abstract theory are verified. Numerical studies illustrating the theoretical results are presented for Darcy flow. }, author = {Boon, Wietse M. and Gläser, Dennis and Helmig, Rainer and Yotov, Ivan}, doi = {10.1137/20M1361407}, eprint = {https://doi.org/10.1137/20M1361407}, journal = {SIAM Journal on Numerical Analysis}, month = {05}, number = 3, pages = {1193-1225}, title = {Flux-Mortar Mixed Finite Element Methods on NonMatching Grids}, url = {https://doi.org/10.1137/20M1361407}, volume = 60, year = 2022 }
  Link
  https://doi.org/10.1137/20M1361407
8. Younes, A., Hoteit, H., Helmig, R., & Fahs, M. (2022). A robust upwind mixed hybrid finite element method for transport in variably saturated porous media. Hydrology and Earth System Sciences, 26, Article 20. https://doi.org/10.5194/hess-26-5227-2022
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  @article{Younes2022, author = {Younes, Anis and Hoteit, Hussein and Helmig, Rainer and Fahs, Marwan}, doi = {10.5194/hess-26-5227-2022}, issn = {1607-7938}, journal = {Hydrology and Earth System Sciences}, month = {10}, number = 20, pages = {5227–5239}, publisher = {Copernicus GmbH}, title = {A robust upwind mixed hybrid finite element method for transport in variably saturated porous media}, url = {http://dx.doi.org/10.5194/hess-26-5227-2022}, volume = 26, year = 2022 }
  Link
  http://dx.doi.org/10.5194/hess-26-5227-2022
9. Tsinober, A., Rosenzweig, R., Class, H., Helmig, R., & Shavit, U. (2022). The Role of Mixed Convection and Hydrodynamic Dispersion During CO2 Dissolution in Saline Aquifers: A Numerical Study. Water Resources Research, 58, Article 3. https://doi.org/10.1029/2021WR030494
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  @article{https://doi.org/10.1029/2021WR030494, abstract = {Abstract Dissolution trapping plays a significant role in CO2 geological storage. When CO2 dissolves in aquifer brines, the aqueous solution is heavier than the underlying resident brine. This results in convective instability in the form of CO2-rich fingers, which accelerates dissolution. It was recently shown that background flow affects CO2 dissolution by suppressing the development of convective fingers. However, there was a discrepancy between computational results and measurements, with the computational results demonstrating a decrease in the dissolution rate and the laboratory measurements showing no significant effect. Here, we attempted to understand this difference by exploring the relations between the transport mechanisms that facilitate convective mixing. We investigated the role of background flow by using numerical simulations that were validated by laboratory measurements and analytical solutions. Simulations were generated for the same porous medium and fluid pair used in the experiments, keeping the Rayleigh number constant, while changing the background velocity and the Peclet number. Studying the flux components revealed three distinct regimes characterized by the Peclet to Rayleigh ratio Pe/Ra. When Pe/Ra < 0.77, natural convection dominated, and dissolution remained approximately constant. When the background flow was large (Pe/Ra > 2), dissolution was controlled by pure forced convection and increased with Pe/Ra. In the intermediate range (0.77 < Pe/Ra < 2), both natural convection and forced convection were important.}, author = {Tsinober, Avihai and Rosenzweig, Ravid and Class, Holger and Helmig, Rainer and Shavit, Uri}, doi = {https://doi.org/10.1029/2021WR030494}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2021WR030494}, journal = {Water Resources Research}, month = {03}, note = {e2021WR030494 2021WR030494}, number = 3, pages = {e2021WR030494}, title = {The Role of Mixed Convection and Hydrodynamic Dispersion During CO2 Dissolution in Saline Aquifers: A Numerical Study}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR030494}, volume = 58, year = 2022 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR030494
10. Hommel, J., Gehring, L., Weinhardt, F., Ruf, M., & Steeb, H. (2022). Effects of Enzymatically Induced Carbonate Precipitation on Capillary Pressure-Saturation Relations. Minerals, 12, Article 10. https://doi.org/10.3390/min12101186
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  @article{min12101186, abstract = {Leakage mitigation methods are an important part of reservoir engineering and subsurface fluid storage, in particular. In the context of multi-phase systems of subsurface storage, e.g., subsurface CO2 storage, a reduction in the intrinsic permeability is not the only parameter to influence the potential flow or leakage; multi-phase flow parameters, such as relative permeability and capillary pressure, are key parameters that are likely to be influenced by pore-space reduction due to leakage mitigation methods, such as induced precipitation. In this study, we investigate the effects of enzymatically induced carbonate precipitation on capillary pressure–saturation relations as the first step in accounting for the effects of induced precipitation on multi-phase flow parameters. This is, to our knowledge, the first exploration of the effect of enzymatically induced carbonate precipitation on capillary pressure–saturation relations thus far. First, pore-scale resolved microfluidic experiments in 2D glass cells and 3D sintered glass-bead columns were conducted, and the change in the pore geometry was observed by light microscopy and micro X-ray computed tomography, respectively. Second, the effects of the geometric change on the capillary pressure–saturation curves were evaluated by numerical drainage experiments using pore-network modeling on the pore networks extracted from the observed geometries. Finally, parameters of both the Brooks–Corey and Van Genuchten relations were fitted to the capillary pressure–saturation curves determined by pore-network modeling and compared with the reduction in porosity as an average measure of the pore geometry’s change due to induced precipitation. The capillary pressures increased with increasing precipitation and reduced porosity. For the 2D setups, the change in the parameters of the capillary pressure–saturation relation was parameterized. However, for more realistic initial geometries of the 3D samples, while the general patterns of increasing capillary pressure may be observed, such a parameterization was not possible using only porosity or porosity reduction, likely due to the much higher variability in the pore-scale distribution of the precipitates between the experiments. Likely, additional parameters other than porosity will need to be considered to accurately describe the effects of induced carbonate precipitation on the capillary pressure–saturation relation of porous media.}, article-number = {1186}, author = {Hommel, Johannes and Gehring, Luca and Weinhardt, Felix and Ruf, Matthias and Steeb, Holger}, doi = {10.3390/min12101186}, issn = {2075-163X}, journal = {Minerals}, number = 10, title = {Effects of Enzymatically Induced Carbonate Precipitation on Capillary Pressure-Saturation Relations}, url = {https://www.mdpi.com/2075-163X/12/10/1186}, volume = 12, year = 2022 }
  Link
  https://www.mdpi.com/2075-163X/12/10/1186
11. Wang, W., Lozano-Durán, A., Helmig, R., & Chu, X. (2022). Spatial and spectral characteristics of information flux between turbulent boundary layers and porous media. Journal of Fluid Mechanics, 949. https://doi.org/10.1017/jfm.2022.770
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  @article{Wang2022, author = {Wang, Wenkang and Lozano-Durán, Adrián and Helmig, Rainer and Chu, Xu}, doi = {10.1017/jfm.2022.770}, issn = {1469-7645}, journal = {Journal of Fluid Mechanics}, month = {09}, publisher = {Cambridge University Press (CUP)}, title = {Spatial and spectral characteristics of information flux between turbulent boundary layers and porous media}, url = {http://dx.doi.org/10.1017/jfm.2022.770}, volume = 949, year = 2022 }
  Link
  http://dx.doi.org/10.1017/jfm.2022.770
12. Becker, B., Guo, B., Buntic, I., Flemisch, B., & Helmig, R. (2022). An Adaptive Hybrid Vertical Equilibrium/Full-Dimensional Model for Compositional Multiphase Flow. Water Resources Research, 58, Article 1. https://doi.org/10.1029/2021WR030990
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  @article{https://doi.org/10.1029/2021WR030990, abstract = {Abstract Efficient compositional models are required to simulate underground gas storage in porous formations where, for example, gas quality (such as purity) and loss of gas due to dissolution are of interest. We first extend the concept of vertical equilibrium (VE) to compositional flow, and derive a compositional VE model by vertical integration. Second, we present a hybrid model that couples the efficient compositional VE model to a compositional full-dimensional model. Subdomains, where the compositional VE model is valid, are identified during simulation based on a VE criterion that compares the vertical profiles of relative permeability at equilibrium to the ones simulated by the full-dimensional model. We demonstrate the applicability of the hybrid model by simulating hydrogen storage in a radially symmetric, heterogeneous porous aquifer. The hybrid model shows excellent adaptivity over space and time for different permeability values in the heterogeneous region, and compares well to the full-dimensional model while being computationally efficient, resulting in a runtime of roughly one-third of the full-dimensional model. Based on the results, we assume that for larger simulation scales, the efficiency of this new model will increase even more.}, author = {Becker, Beatrix and Guo, Bo and Buntic, Ivan and Flemisch, Bernd and Helmig, Rainer}, doi = {https://doi.org/10.1029/2021WR030990}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2021WR030990}, journal = {Water Resources Research}, month = {01}, note = {e2021WR030990 2021WR030990}, number = 1, pages = {e2021WR030990}, title = {An Adaptive Hybrid Vertical Equilibrium/Full-Dimensional Model for Compositional Multiphase Flow}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR030990}, volume = 58, year = 2022 }
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  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR030990
13. Koch, T., Wu, H., & Schneider, M. (2022). Nonlinear mixed-dimension model for embedded tubular networks with application to root water uptake. Journal of Computational Physics, 450, 110823. https://doi.org/10.1016/j.jcp.2021.110823
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  @article{KOCH2022110823, abstract = {We present a numerical scheme for the solution of nonlinear mixed-dimensional PDEs describing coupled processes in embedded tubular network system in exchange with a bulk domain. Such problems arise in various biological and technical applications such as in the modeling of root-water uptake, heat exchangers, or geothermal wells. The nonlinearity appears in form of solution-dependent parameters such as pressure-dependent permeability or temperature-dependent thermal conductivity. We derive and analyze a numerical scheme based on distributing the bulk-network coupling source term by a smoothing kernel with local support. By the use of local analytical solutions, interface unknowns and fluxes at the bulk-network interface can be accurately reconstructed from coarsely resolved numerical solutions in the bulk domain. Numerical examples give confidence in the robustness of the method and show the results in comparison to previously published methods. The new method outperforms these existing methods in accuracy and efficiency. In a root water uptake scenario, we accurately estimate the transpiration rate using only a few thousand 3D mesh cells and a structured cube grid whereas other state-of-the-art numerical schemes require millions of cells and local grid refinement to reach comparable accuracy.}, author = {Koch, Timo and Wu, Hanchuan and Schneider, Martin}, doi = {https://doi.org/10.1016/j.jcp.2021.110823}, issn = {0021-9991}, journal = {Journal of Computational Physics}, month = {02}, pages = 110823, title = {Nonlinear mixed-dimension model for embedded tubular networks with application to root water uptake}, url = {https://www.sciencedirect.com/science/article/pii/S002199912100718X}, volume = 450, year = 2022 }
  Link
  https://www.sciencedirect.com/science/article/pii/S002199912100718X
14. Winter, R., Valsamidou, A., Class, H., & Flemisch, B. (2022). A Study on Darcy versus Forchheimer Models for Flow through Heterogeneous Landfills including Macropores. Water, 14, Article 4. https://doi.org/10.3390/w14040546
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  @article{paper-2022-Winter, abstract = {Flow through heterogeneous landfills that include macropores may occur under Reynolds numbers higher than those where Darcy’s law is valid. Extensions, such as a Forchheimer approach, may be required to include inertial effects. Our aim is developing predictive models for such landfills that are built from the low-level radioactive waste and debris of dismantled nuclear power plants. It consists of different materials, which after crushing result in a spatially heterogeneous distribution of porous-media properties in the landfills. Rain events or leakage, for example, may wash out radionuclides and transport them with the water flow. We investigate here the water flow and consider an inclusion of macropores. To deal with possibly high velocities, we choose the Forchheimer model and, taking different Forchheimer coefficients into account, compare it to the Darcy model. The focal points of the study are (i) the influence of the macropores on the flow field and (ii) the impact of the choice of the Forchheimer coefficient both on the solution and the computational effort. The results show that dependent on their size, macropores can dominate the flow field. Furthermore, Forchheimer coefficients introducing more inertial effects are associated with considerably higher runtimes.}, article-number = {546}, author = {Winter, Roman and Valsamidou, Archontoula and Class, Holger and Flemisch, Bernd}, doi = {10.3390/w14040546}, issn = {2073-4441}, journal = {Water}, number = 4, title = {A Study on Darcy versus Forchheimer Models for Flow through Heterogeneous Landfills including Macropores}, url = {https://www.mdpi.com/2073-4441/14/4/546}, volume = 14, year = 2022 }
  Link
  https://www.mdpi.com/2073-4441/14/4/546
15. Younes, A., Hoteit, H., Helmig, R., & Fahs, M. (2022). A robust fully mixed finite element model for flow and transport in unsaturated fractured porous media. Advances in Water Resources, 166, 104259. https://doi.org/10.1016/j.advwatres.2022.104259
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  @article{YOUNES2022104259, abstract = {A fully mixed finite element (MFE) model is developed for nonlinear flow and transport in unsaturated fractured porous media with matrix-fracture and fracture-fracture fluid and mass exchanges. The model is based on the discrete fracture matrix (DFM) approach and assumes cross-flow equilibrium in the fractures. The MFE method is employed for the spatial discretization of both flow and transport on the 2D-matrix elements as well as on the 1D-fracture elements. An upwind scheme is employed to avoid unphysical oscillations in the case of advection dominant transport. The temporal discretization is performed using high-order time integration methods and efficient automatic time-stepping schemes via the MOL. Two test problems dealing with flow and mass transport in saturated and unsaturated fractured porous media are simulated to show the validity of the new model by comparison against (i) a 1D-2D Comsol finite element model and (ii) a 2D-2D Discontinuous Galerkin (DG) model where both fractures and matrix continua are discretized with small 2D mesh elements. The robustness and efficiency of the developed 1D-2D MFE model are then investigated for a challenging problem dealing with infiltration of contaminated water into an initially dry soil involving a fracture network. The new model yields stable results for advection-dominated and advection-dispersion transport configurations. Further, the results of the 1D-2D MFE model are in very good agreement with those of the 2D-2D DG model for both configurations. The simulation of infiltration of contaminated water into a dry fractured soil shows that the 1D-2D MFE model is within 15 times more efficient than the 2D-2D DG model, which confirms the high benefit of using robust and efficient DFM models for the simulation of flow and transport in fractured porous media.}, author = {Younes, Anis and Hoteit, Hussein and Helmig, Rainer and Fahs, Marwan}, doi = {https://doi.org/10.1016/j.advwatres.2022.104259}, issn = {0309-1708}, journal = {Advances in Water Resources}, month = {08}, pages = 104259, title = {A robust fully mixed finite element model for flow and transport in unsaturated fractured porous media}, url = {https://www.sciencedirect.com/science/article/pii/S0309170822001294}, volume = 166, year = 2022 }
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  https://www.sciencedirect.com/science/article/pii/S0309170822001294
16. Kelm, M., Gärttner, S., Bringedal, C., Flemisch, B., Knabner, P., & Ray, N. (2022). Comparison study of phase-field and level-set method for three-phase systems including two minerals. Computational Geosciences, 26, Article 3. https://doi.org/10.1007/s10596-022-10142-w
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  @article{kelm_comparison_2022, abstract = {We investigate reactive flow and transport in evolving porous media. Solute species that are transported within the fluid phase are taking part in mineral precipitation and dissolution reactions for two competing mineral phases. The evolution of the three phases is not known a-priori but depends on the concentration of the dissolved solute species. To model the coupled behavior, phase-field and level-set models are formulated. These formulations are compared in three increasingly challenging setups including significant mineral overgrowth. Simulation outcomes are examined with respect to mineral volumes and surface areas as well as derived effective quantities such as diffusion and permeability tensors. In doing so, we extend the results of current benchmarks for mineral dissolution/precipitation at the pore-scale to the multiphasic solid case. Both approaches are found to be able to simulate the evolution of the three-phase system, but the phase-field model is influenced by curvature-driven motion.}, author = {Kelm, Mathis and Gärttner, Stephan and Bringedal, Carina and Flemisch, Bernd and Knabner, Peter and Ray, Nadja}, doi = {10.1007/s10596-022-10142-w}, issn = {1573-1499}, journal = {Computational Geosciences}, language = {en}, month = {06}, number = 3, pages = {545--570}, title = {Comparison study of phase-field and level-set method for three-phase systems including two minerals}, url = {https://doi.org/10.1007/s10596-022-10142-w}, urldate = {2022-07-08}, volume = 26, year = 2022 }
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  https://doi.org/10.1007/s10596-022-10142-w
17. Ahmadi, N., Muniruzzaman, M., Sprocati, R., Heck, K., Mosthaf, K., & Rolle, M. (2022). Coupling soil/atmosphere interactions and geochemical processes: A multiphase and multicomponent reactive transport approach. Advances in Water Resources, 169, 104303. https://doi.org/10.1016/j.advwatres.2022.104303
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  @article{lh2-dtu-ahmadi-2022, abstract = {The exchange of gas components across the subsurface/atmosphere interface influences multiphase flow and reactive transport in the subsurface and is crucial for many biogeochemical processes, for the emission of greenhouse gases, and for the fate of volatile contaminants. In this study, we present a modeling approach to simulate non-isothermal multiphase flow and multicomponent reactive transport in coupled subsurface/atmosphere compartments. The model is based on a coupled porous medium/free flow domain in which the Navier-Stokes equation is used to describe single-phase (gaseous) flow in the free-flow subdomain and Darcy's law is applied for two-phase flow in the porous medium subdomain (i.e., two-domain approach). The implementation is performed by coupling COMSOL Multiphysics and PhreeqcRM, which enables the investigation of the interplay between multi-physical processes (i.e., flow, mass and heat transport) in the coupled compartments and geochemical reactions in the porous medium. We first present a set of benchmark examples in which key features of the proposed model are tested against other numerical simulators and an analytical solution. Successively, we take advantage of the unique capabilities of the proposed approach to explore conservative and reactive transport of gas components in a coupled porous medium/free flow domain. The results show that the exchange processes between the compartments control the location of reactive zones and the extent of geochemical reactions (i.e., mineral dissolution) by changing the spatiotemporal distribution of fluid phases and enhancing the interphase mass transfer of key gas components such as oxygen and carbon dioxide.}, author = {Ahmadi, Navid and Muniruzzaman, Muhammad and Sprocati, Riccardo and Heck, Katharina and Mosthaf, Klaus and Rolle, Massimo}, doi = {https://doi.org/10.1016/j.advwatres.2022.104303}, issn = {0309-1708}, journal = {Advances in Water Resources}, pages = 104303, title = {Coupling soil/atmosphere interactions and geochemical processes: A multiphase and multicomponent reactive transport approach}, url = {https://www.sciencedirect.com/science/article/pii/S0309170822001671}, volume = 169, year = 2022 }
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  https://www.sciencedirect.com/science/article/pii/S0309170822001671
18. Lei, H., Chen, Z., & Kang, X. (2022). Examination of particle shape on the shear behaviours of granules using 3D printed soil. European Journal of Environmental and Civil Engineering, 26, Article 9. https://doi.org/10.1080/19648189.2020.1845983
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  @article{lei2022examination, author = {Lei, Hang and Chen, Zhixin and Kang, Xin}, doi = {https://doi.org/10.1080/19648189.2020.1845983}, journal = {European Journal of Environmental and Civil Engineering}, number = 9, pages = {4200--4219}, publisher = {Taylor & Francis}, title = {Examination of particle shape on the shear behaviours of granules using 3D printed soil}, volume = 26, year = 2022 }
19. Gläser, D., Schneider, M., Flemisch, B., & Helmig, R. (2022). Comparison of cell- and vertex-centered finite-volume schemes for flow in fractured porous media. Journal of Computational Physics, 448, 110715. https://doi.org/10.1016/j.jcp.2021.110715
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  @article{paper-2021-glaeser-boxdfm, abstract = {Flow in fractured porous media is of high relevance in a variety of geotechnical applications, given the fact that they ubiquitously occur in nature and that they can have a substantial impact on the hydraulic properties of rock. As a response to this, an active field of research has developed over the past decades, focusing on the development of mathematical models and numerical methods to describe and simulate the flow processes in fractured rock. In this work, we present a comparison of different finite volume-based numerical schemes for the simulation of flow in fractured porous media by means of numerical experiments. Two novel vertex-centered approaches are presented and compared to well-established numerical schemes in terms of convergence behavior and their performance on benchmark studies taken from the literature. The new schemes show to produce results that are in good agreement with those of established methods while leading to less degrees of freedom on unstructured simplex grids.}, author = {Gläser, Dennis and Schneider, Martin and Flemisch, Bernd and Helmig, Rainer}, doi = {https://doi.org/10.1016/j.jcp.2021.110715}, journal = {Journal of Computational Physics}, month = {01}, pages = 110715, publisher = {Elsevier {BV}}, title = {Comparison of cell- and vertex-centered finite-volume schemes for flow in fractured porous media}, url = {https://www.sciencedirect.com/science/article/pii/S0021999121006100}, volume = 448, year = 2022 }
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  https://www.sciencedirect.com/science/article/pii/S0021999121006100
20. Michalkowski, C., Veyskarami, M., Bringedal, C., Helmig, R., & Schleper, V. (2022). Two-phase Flow Dynamics at the Interface Between GDL and Gas Distributor Channel Using a Pore-Network Model. Transport in Porous Media, 144, Article 2. https://doi.org/10.1007/s11242-022-01813-4
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  @article{michalkowski_two-phase_2022, abstract = {For improved operating conditions of a polymer electrolyte membrane (PEM) fuel cell, a sophisticated water management is crucial. Therefore, it is necessary to understand the transport mechanisms of water throughout the cell constituents especially on the cathode side, where the excess water has to be removed. Pore-scale modeling of diffusion layers and gas distributor has been established as a favorable technique to investigate the ongoing processes. Investigating the interface between the cathode layers, a particular challenge is the combination and interaction of the multi-phase flow in the porous material of the gas diffusion layer (GDL) with the free flow in the gas distributor channels. The formation, growth and detachment of water droplets on the hydrophobic, porous surface of the GDL have a major influence on the mass, momentum and energy exchange between the layers. A dynamic pore-network model is used to describe the flow through the porous GDL on the pore-scale. To capture the droplet occurrence and its influence on the flow, this dynamic two-phase pore-network model is extended to capture droplet formation and growth at the surface of the GDL as well as droplet detachment due to the gas flow in the gas distributor channels. In this article, the developed model is applied to single- and multi-tube systems to investigate the general drop behavior. These rather simple test-cases are compared to experimental and numerical data available in the literature. Finally, the model is applied to a GDL unit cell to analyze the interaction between two-phase flow through the GDL and drop formation at the interface between GDL and gas distributor channel.}, author = {Michalkowski, Cynthia and Veyskarami, Maziar and Bringedal, Carina and Helmig, Rainer and Schleper, Veronika}, doi = {10.1007/s11242-022-01813-4}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {09}, number = 2, pages = {429--458}, title = {Two-phase Flow Dynamics at the Interface Between GDL and Gas Distributor Channel Using a Pore-Network Model}, url = {https://doi.org/10.1007/s11242-022-01813-4}, volume = 144, year = 2022 }
  Link
  https://doi.org/10.1007/s11242-022-01813-4
21. Eller, J., Sauerborn, T., Becker, B., Buntic, I., Gross, J., & Helmig, R. (2022). Modeling Subsurface Hydrogen Storage With Transport Properties From Entropy Scaling Using the PC-SAFT Equation of State. Water Resources Research, 58, Article 4. https://doi.org/10.1029/2021WR030885
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  @article{https://doi.org/10.1029/2021WR030885, abstract = {Abstract Hydrogen is a promising alternative to carbon based energy carriers and may be stored in large quantities in subsurface storage deposits. This work assesses the impact of static (density and phase equilibria) and dynamic (viscosity and diffusion coefficients) properties on the pressure field during the injection and extraction of hydrogen in the porous subsurface. In a first step, we derive transport properties for water, hydrogen and their mixture using the Perturbed-Chain Statistical Associating Fluid Theory equation of state in combination with an entropy scaling approach and compare model predictions to alternative models from the literature. Our model compares excellently to experimental transport coefficients and models from literature with a higher number of adjustable parameters, such as GERG2008, and shows a clear improvement over empirical correlations for transport coefficients of hydrogen. In a second step, we determine the effect of further model reduction by comparing our against a much simpler model applying empirical transport coefficients from the literature. For this purpose, hydrogen is periodically injected into and extracted out of a dome-shaped porous aquifer under a caprock. Our results show that density and viscosity of hydrogen have the highest impact on the pressure field, and that a thermodynamic model like the new model presented here is essential for modeling the storage aquifer, while keeping the number of coefficients at a minimum. In diffusion-dominated settings such as the diffusion of hydrogen through the caprock, our developed diffusion coefficients show a much improved dependence on temperature and pressure, leading to a more accurate approximation of the diffusive fluxes.}, author = {Eller, Johannes and Sauerborn, Tim and Becker, Beatrix and Buntic, Ivan and Gross, Joachim and Helmig, Rainer}, doi = {https://doi.org/10.1029/2021WR030885}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2021WR030885}, journal = {Water Resources Research}, month = {04}, note = {e2021WR030885 2021WR030885}, number = 4, pages = {e2021WR030885}, title = {Modeling Subsurface Hydrogen Storage With Transport Properties From Entropy Scaling Using the PC-SAFT Equation of State}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR030885}, volume = 58, year = 2022 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR030885
22. Weishaupt, K., Koch, T., & Helmig, R. (2022). A fully implicit coupled pore-network/free-flow model for the pore-scale simulation of drying processes. Drying Technology, 40, Article 4. https://doi.org/10.1080/07373937.2021.1955706
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  @article{doi:10.1080/07373937.2021.1955706, abstract = { We present a fully coupled pore-network/free-flow model providing pore-scale insight into drying processes. We solve the Navier–Stokes equations with component transport in the free-flow region, coupled to a dynamic two-phase, two-component pore-network model (PNM) in the porous domain. The dynamic multi-physics model allows to temporally resolve drying processes in-between capillary equilibrium states. All simulations are non-isothermal and use pressure- and temperature-depended fluid properties. Carefully chosen coupling conditions and a monolithic solver ensure local conservation of mass, momentum, and energy fluxes, in particular at the interface between both model domains. We solve for wetting and non-wetting fluid pressure fields and consider advective gas transport in the network. Numerical examples demonstrate that the coupled model is able to cover a wide range of physical processes relevant for drying and show the mutual interaction of the two subregions. The model is implemented in the modular open-source framework DuMux such that extensions are straight-forward. }, author = {Weishaupt, Kilian and Koch, Timo and Helmig, Rainer}, doi = {10.1080/07373937.2021.1955706}, eprint = {https://doi.org/10.1080/07373937.2021.1955706}, journal = {Drying Technology}, month = {08}, number = 4, pages = {697-718}, publisher = {Taylor & Francis}, title = {A fully implicit coupled pore-network/free-flow model for the pore-scale simulation of drying processes}, url = {/brokenurl# https://doi.org/10.1080/07373937.2021.1955706 }, volume = 40, year = 2022 }
  Link
  /brokenurl# https://doi.org/10.1080/07373937.2021.1955706
23. Chen, Z., & Hu, L. (2022). Adsorption of naphthalene on clay minerals: a molecular dynamics simulation study. Materials, 15, Article 15. https://doi.org/10.3390/ma15155120
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  @article{chen2022adsorption, author = {Chen, Zhixin and Hu, Liming}, doi = {https://doi.org/10.3390/ma15155120}, journal = {Materials}, number = 15, pages = 5120, publisher = {MDPI}, title = {Adsorption of naphthalene on clay minerals: a molecular dynamics simulation study}, volume = 15, year = 2022 }
2021
1. von Wolff, L., Weinhardt, F., Class, H., Hommel, J., & Rohde, C. (2021). Investigation of Crystal Growth in Enzymatically Induced Calcite Precipitation by Micro-Fluidic Experimental Methods and Comparison with Mathematical Modeling. Transport in Porous Media, 137, Article 2. https://doi.org/10.1007/s11242-021-01560-y
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  @article{vonWolff2021-Weinhardt, abstract = {Enzymatically induced calcite precipitation (EICP) is an engineering technology that allows for targeted reduction of porosity in a porous medium by precipitation of calcium carbonates. This might be employed for reducing permeability in order to seal flow paths or for soil stabilization. This study investigates the growth of calcium-carbonate crystals in a micro-fluidic EICP setup and relies on experimental results of precipitation observed over time and under flow-through conditions in a setup of four pore bodies connected by pore throats. A phase-field approach to model the growth of crystal aggregates is presented, and the corresponding simulation results are compared to the available experimental observations. We discuss the model's capability to reproduce the direction and volume of crystal growth. The mechanisms that dominate crystal growth are complex depending on the local flow field as well as on concentrations of solutes. We have good agreement between experimental data and model results. In particular, we observe that crystal aggregates prefer to grow in upstream flow direction and toward the center of the flow channels, where the volume growth rate is also higher due to better supply.}, author = {von Wolff, Lars and Weinhardt, Felix and Class, Holger and Hommel, Johannes and Rohde, Christian}, day = 24, doi = {10.1007/s11242-021-01560-y}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {02}, number = 2, publisher = {Springer Science and Business Media LLC}, title = {Investigation of Crystal Growth in Enzymatically Induced Calcite Precipitation by Micro-Fluidic Experimental Methods and Comparison with Mathematical Modeling}, url = {https://doi.org/10.1007/s11242-021-01560-y}, volume = 137, year = 2021 }
  Link
  https://doi.org/10.1007/s11242-021-01560-y
2. Kurgyis, K., Hommel, J., Flemisch, B., Helmig, R., & Ott, H. (2021). Explicit continuum scale modeling of low-salinity mechanisms. Journal of Petroleum Science and Engineering, 199, 108336. https://doi.org/10.1016/j.petrol.2020.108336
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  @article{KURGYIS2021108336, abstract = {Understanding the influence of injection water composition on the displacement efficiency has been a long-standing issue in reservoir engineering; a reduction of the injection water salinity can lead to additional oil production, which is considered a low-cost and environmentally friendly method for enhanced oil recovery. Several underlying chemical mechanisms have been identified; however, the identification of the governing mechanisms remains difficult and specific to the chemical setting of the reservoir and injection water composition. In this work, we implement two potential mechanisms, namely, double layer expansion and multicomponent ion exchange, to achieve an explicit description of low-salinity effects in the open-source continuum-scale flow simulator DuMuX, with the goal of designing and interpreting experiments, and upscaling the results. By assuming sets of input parameters, we show that there is a minimum required core length dependent on the dispersion of the chemical flooding front dominated by sample heterogeneity. Above this length scale, the saturation profile is fully developed, and the chemical effluent analysis is conclusive, which both is required to calibrate continuum scale models. The change in the chemical water composition shows a characteristic fingerprint for both investigated mechanisms and therefore allows the identification of the leading low-salinity mechanism. The model is publicly available.}, author = {Kurgyis, Kata and Hommel, Johannes and Flemisch, Bernd and Helmig, Rainer and Ott, Holger}, doi = {10.1016/j.petrol.2020.108336}, issn = {0920-4105}, journal = {Journal of Petroleum Science and Engineering}, month = {04}, pages = 108336, publisher = {Elsevier {BV}}, title = {Explicit continuum scale modeling of low-salinity mechanisms}, url = {http://www.sciencedirect.com/science/article/pii/S0920410520313905}, volume = 199, year = 2021 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0920410520313905
3. Weishaupt, K., Koch, T., & Helmig, R. (2021). A fully implicit coupled pore-network/free-flow model for the pore-scale simulation of drying processes. Drying Technology, 0, Article 0. https://doi.org/10.1080/07373937.2021.1955706
  - BibTeX
  - Link
  BibTeX
  @article{weishaupt2021, abstract = { We present a fully coupled pore-network/free-flow model providing pore-scale insight into drying processes. We solve the Navier–Stokes equations with component transport in the free-flow region, coupled to a dynamic two-phase, two-component pore-network model (PNM) in the porous domain. The dynamic multi-physics model allows to temporally resolve drying processes in-between capillary equilibrium states. All simulations are non-isothermal and use pressure- and temperature-depended fluid properties. Carefully chosen coupling conditions and a monolithic solver ensure local conservation of mass, momentum, and energy fluxes, in particular at the interface between both model domains. We solve for wetting and non-wetting fluid pressure fields and consider advective gas transport in the network. Numerical examples demonstrate that the coupled model is able to cover a wide range of physical processes relevant for drying and show the mutual interaction of the two subregions. The model is implemented in the modular open-source framework DuMux such that extensions are straight-forward. }, author = {Weishaupt, Kilian and Koch, Timo and Helmig, Rainer}, doi = {10.1080/07373937.2021.1955706}, eprint = {https://doi.org/10.1080/07373937.2021.1955706}, journal = {Drying Technology}, month = {04}, number = 0, pages = {1--22}, publisher = {Informa {UK} Limited}, title = {A fully implicit coupled pore-network/free-flow model for the pore-scale simulation of drying processes}, url = {https://doi.org/10.1080/07373937.2021.1955706}, volume = 0, year = 2021 }
  Link
  https://doi.org/10.1080/07373937.2021.1955706
4. Scheurer, S., Schäfer Rodrigues Silva, A., Mohammadi, F., Hommel, J., Oladyshkin, S., Flemisch, B., & Nowak, W. (2021). Surrogate-based Bayesian comparison of computationally expensive models: application to microbially induced calcite precipitation. Computational Geosciences. https://doi.org/10.1007/s10596-021-10076-9
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  @article{scheurer_surrogate-based_2021, abstract = {Geochemical processes in subsurface reservoirs affected by microbial activity change the material properties of porous media. This is a complex biogeochemical process in subsurface reservoirs that currently contains strong conceptual uncertainty. This means, several modeling approaches describing the biogeochemical process are plausible and modelers face the uncertainty of choosing the most appropriate one. The considered models differ in the underlying hypotheses about the process structure. Once observation data become available, a rigorous Bayesian model selection accompanied by a Bayesian model justifiability analysis could be employed to choose the most appropriate model, i.e. the one that describes the underlying physical processes best in the light of the available data. However, biogeochemical modeling is computationally very demanding because it conceptualizes different phases, biomass dynamics, geochemistry, precipitation and dissolution in porous media. Therefore, the Bayesian framework cannot be based directly on the full computational models as this would require too many expensive model evaluations. To circumvent this problem, we suggest to perform both Bayesian model selection and justifiability analysis after constructing surrogates for the competing biogeochemical models. Here, we will use the arbitrary polynomial chaos expansion. Considering that surrogate representations are only approximations of the analyzed original models, we account for the approximation error in the Bayesian analysis by introducing novel correction factors for the resulting model weights. Thereby, we extend the Bayesian model justifiability analysis and assess model similarities for computationally expensive models. We demonstrate the method on a representative scenario for microbially induced calcite precipitation in a porous medium. Our extension of the justifiability analysis provides a suitable approach for the comparison of computationally demanding models and gives an insight on the necessary amount of data for a reliable model performance.}, author = {Scheurer, Stefania and Schäfer Rodrigues Silva, Aline and Mohammadi, Farid and Hommel, Johannes and Oladyshkin, Sergey and Flemisch, Bernd and Nowak, Wolfgang}, doi = {10.1007/s10596-021-10076-9}, issn = {1573-1499}, journal = {Computational Geosciences}, month = {08}, publisher = {Springer Science and Business Media {LLC}}, title = {Surrogate-based Bayesian comparison of computationally expensive models: application to microbially induced calcite precipitation}, url = {https://doi.org/10.1007/s10596-021-10076-9}, year = 2021 }
  Link
  https://doi.org/10.1007/s10596-021-10076-9
5. Koch, T., Gläser, D., Weishaupt, K., Ackermann, S., Beck, M., Becker, B., Burbulla, S., Class, H., Coltman, E., Emmert, S., Fetzer, T., Grüninger, C., Heck, K., Hommel, J., Kurz, T., Lipp, M., Mohammadi, F., Scherrer, S., Schneider, M., et al. (2021). DuMux 3 – an open-source simulator for solving flow and transport problems in porous media with a focus on model coupling. Computers & Mathematics with Applications. https://doi.org/10.1016/j.camwa.2020.02.012
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  @article{Version3Dumux, abstract = {We present version 3 of the open-source simulator for flow and transport processes in porous media DuMux. DuMux is based on the modular C++ framework Dune (Distributed and Unified Numerics Environment) and is developed as a research code with a focus on modularity and reusability. We describe recent efforts in improving the transparency and efficiency of the development process and community-building, as well as efforts towards quality assurance and reproducible research. In addition to a major redesign of many simulation components in order to facilitate setting up complex simulations in DuMux, version 3 introduces a more consistent abstraction of finite volume schemes. Finally, the new framework for multi-domain simulations is described, and three numerical examples demonstrate its flexibility.}, author = {Koch, Timo and Gl\"{a}ser, Dennis and Weishaupt, Kilian and Ackermann, Sina and Beck, Martin and Becker, Beatrix and Burbulla, Samuel and Class, Holger and Coltman, Edward and Emmert, Simon and Fetzer, Thomas and Gr\"{u}ninger, Christoph and Heck, Katharina and Hommel, Johannes and Kurz, Theresa and Lipp, Melanie and Mohammadi, Farid and Scherrer, Samuel and Schneider, Martin and Seitz, Gabriele and Stadler, Leopold and Utz, Martin and Weinhardt, Felix and Flemisch, Bernd}, doi = {10.1016/j.camwa.2020.02.012}, issn = {0898-1221}, journal = {Computers {\&} Mathematics with Applications}, month = {01}, publisher = {Elsevier {BV}}, title = {{DuMux} 3 {\textendash} an open-source simulator for solving flow and transport problems in porous media with a focus on model coupling}, url = {https://doi.org/10.1016/j.camwa.2020.02.012}, year = 2021 }
  Link
  https://doi.org/10.1016/j.camwa.2020.02.012
6. Wang, W. (., Yang, G. (., Evrim, C., Terzis, A., Helmig, R., & Chu, X. (. (2021). An assessment of turbulence transportation near regular and random permeable interfaces. Physics of Fluids, 33, Article 11. https://doi.org/10.1063/5.0069311
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  @article{wang_assessment_2021, annote = {doi: 10.1063/5.0069311}, author = {Wang, Wenkang (王文康) and Yang, Guang (杨光) and Evrim, Cenk and Terzis, Alexandros and Helmig, Rainer and Chu, Xu (初旭)}, doi = {10.1063/5.0069311}, issn = {1070-6631}, journal = {Physics of Fluids}, month = {11}, note = {Publisher: American Institute of Physics}, number = 11, pages = 115103, title = {An assessment of turbulence transportation near regular and random permeable interfaces}, url = {https://doi.org/10.1063/5.0069311}, urldate = {2022-11-16}, volume = 33, year = 2021 }
  Link
  https://doi.org/10.1063/5.0069311
7. Schneider, J., Groh, J., Pütz, T., Helmig, R., Rothfuss, Y., Vereecken, H., & Vanderborght, J. (2021). Prediction of soil evaporation measured with weighable lysimeters using the FAO Penman–Monteith method in combination with Richards’ equation. Vadose Zone Journal, 20, Article 1. https://doi.org/10.1002/vzj2.20102
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  @article{schneider_prediction_2021, abstract = {Abstract Multiannual data (2016–2018) from 12 weighed lysimeters (four soil types with textures ranging from sandy loam to silt loam, three replicates) of the TERENO SOILCan network were used to evaluate if evaporation (E) rates could be predicted from weather data using the FAO Penman–Monteith (PM) method combined with soil water flow simulations using the Richards equation. Soil hydraulic properties (SHPs) were estimated either from soil texture using the ROSETTA pedotransfer functions, from in situ measured water retention curves, or from soil surface water contents using inverse modeling. In all years, E was water limited and the measured evaporation rates (Em) surprisingly did not vary significantly among the four different soil types. When SHPs derived from pedotransfer functions were used, simulated evaporation rates of the finer textured soils overestimated the measured ones considerably. Better agreement was obtained when simulations were based on in situ measured or inversely estimated SHPs. The SHPs estimated from pedotransfer functions represented unrealistically large characteristic lengths of evaporation (Lc), and Lc was found to be a useful characteristic to constrain estimates of SHPs. Also, when soil evaporation was water limited and Em rates were below Epot (PM evaporation scaled by an empirical coefficient), the diurnal dynamics of Em followed those of Epot. The Richards equation that considers only isothermal liquid water flow did not reproduce these dynamics caused by temperature dependent vapor transport in the soil.}, author = {Schneider, Jana and Groh, Jannis and Pütz, Thomas and Helmig, Rainer and Rothfuss, Youri and Vereecken, Harry and Vanderborght, Jan}, doi = {https://doi.org/10.1002/vzj2.20102}, journal = {Vadose Zone Journal}, number = 1, pages = {e20102}, title = {Prediction of soil evaporation measured with weighable lysimeters using the FAO Penman–Monteith method in combination with Richards’ equation}, url = {https://acsess.onlinelibrary.wiley.com/doi/abs/10.1002/vzj2.20102}, volume = 20, year = 2021 }
  Link
  https://acsess.onlinelibrary.wiley.com/doi/abs/10.1002/vzj2.20102
8. Berre, I., Boon, W. M., Flemisch, B., Fumagalli, A., Gläser, D., Keilegavlen, E., Scotti, A., Stefansson, I., Tatomir, A., Brenner, K., Burbulla, S., Devloo, P., Duran, O., Favino, M., Hennicker, J., Lee, I.-H., Lipnikov, K., Masson, R., Mosthaf, K., et al. (2021). Verification benchmarks for single-phase flow in three-dimensional fractured porous media. Advances in Water Resources, 147, 103759. https://doi.org/10.1016/j.advwatres.2020.103759
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  @article{BERRE2021103759, abstract = {Flow in fractured porous media occurs in the earth’s subsurface, in biological tissues, and in man-made materials. Fractures have a dominating influence on flow processes, and the last decade has seen an extensive development of models and numerical methods that explicitly account for their presence. To support these developments, four benchmark cases for single-phase flow in three-dimensional fractured porous media are presented. The cases are specifically designed to test the methods’ capabilities in handling various complexities common to the geometrical structures of fracture networks. Based on an open call for participation, results obtained with 17 numerical methods were collected. This paper presents the underlying mathematical model, an overview of the features of the participating numerical methods, and their performance in solving the benchmark cases.}, author = {Berre, Inga and Boon, Wietse M. and Flemisch, Bernd and Fumagalli, Alessio and Gläser, Dennis and Keilegavlen, Eirik and Scotti, Anna and Stefansson, Ivar and Tatomir, Alexandru and Brenner, Konstantin and Burbulla, Samuel and Devloo, Philippe and Duran, Omar and Favino, Marco and Hennicker, Julian and Lee, I-Hsien and Lipnikov, Konstantin and Masson, Roland and Mosthaf, Klaus and Nestola, Maria Giuseppina Chiara and Ni, Chuen-Fa and Nikitin, Kirill and Schädle, Philipp and Svyatskiy, Daniil and Yanbarisov, Ruslan and Zulian, Patrick}, doi = {https://doi.org/10.1016/j.advwatres.2020.103759}, issn = {0309-1708}, journal = {Advances in Water Resources}, pages = 103759, title = {Verification benchmarks for single-phase flow in three-dimensional fractured porous media}, url = {https://www.sciencedirect.com/science/article/pii/S0309170820301603}, volume = 147, year = 2021 }
  Link
  https://www.sciencedirect.com/science/article/pii/S0309170820301603
9. Wagner, A., Eggenweiler, E., Weinhardt, F., Trivedi, Z., Krach, D., Lohrmann, C., Jain, K., Karadimitriou, N., Bringedal, C., Voland, P., Holm, C., Class, H., Steeb, H., & Rybak, I. (2021). Permeability Estimation of Regular Porous Structures: A Benchmark for Comparison of Methods. Transport in Porous Media, 138, Article 1. https://doi.org/10.1007/s11242-021-01586-2
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  @article{lh2-2021-weinhardt-benchmark, author = {Wagner, Arndt and Eggenweiler, Elissa and Weinhardt, Felix and Trivedi, Zubin and Krach, David and Lohrmann, Christoph and Jain, Kartik and Karadimitriou, Nikolaus and Bringedal, Carina and Voland, Paul and Holm, Christian and Class, Holger and Steeb, Holger and Rybak, Iryna}, doi = {10.1007/s11242-021-01586-2}, journal = {Transport in Porous Media}, month = {04}, number = 1, pages = {1-23}, title = {Permeability Estimation of Regular Porous Structures: A Benchmark for Comparison of Methods}, url = {https://doi.org/10.1007/s11242-021-01586-2}, volume = 138, year = 2021 }
  Link
  https://doi.org/10.1007/s11242-021-01586-2
10. Weinhardt, F., Class, H., Dastjerdi, S. V., Karadimitriou, N., Lee, D., & Steeb, H. (2021). Experimental Methods and Imaging for Enzymatically Induced Calcite Precipitation in a microfluidic cell. Water Resources Research, 57, e2020WR029361. https://doi.org/doi.org/10.1029/2020WR029361
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  @article{Weinhardtetal2021, abstract = {Abstract Enzymatically induced calcite precipitation (EICP) in porous media can be used as an engineering option to achieve precipitation in the pore space, for example, aiming at a targeted sealing of existing flow paths. This is accomplished through a porosity and consequent permeability alteration. A major source of uncertainty in modeling EICP is in the quantitative description of permeability alteration due to precipitation. This report presents methods for investigating experimentally the time-resolved effects of growing precipitates on porosity and permeability on the pore scale, in a poly-di-methyl-siloxane microfluidic flow cell. These methods include the design and production of the microfluidic cells, the preparation and usage of the chemical solutions, the injection strategy, and the monitoring of pressure drops for given fluxes for the determination of permeability. EICP imaging methods are explained, including optical microscopy and X-ray microcomputed tomography (XRCT), and the corresponding image processing and analysis. We present and discuss a new experimental procedure using a microfluidic cell, as well as the general perspectives for further experimental and numerical simulation studies on induced calcite precipitation. The results of this study show the enormous benefits and insights achieved by combining both light microscopy and XRCT with hydraulic measurements in microfluidic chips. This allows for a quantitative analysis of the evolution of precipitates with respect to their size and shape, while monitoring their influence on permeability. We consider this to be an improvement of the existing methods in the literature regarding the interpretation of recorded data (pressure, flux, and visualization) during pore morphology alteration.}, author = {Weinhardt, Felix and Class, Holger and Dastjerdi, Samaneh Vahid and Karadimitriou, Nikolaos and Lee, Dongwon and Steeb, Holger}, doi = {doi.org/10.1029/2020WR029361}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2020WR029361}, journal = {Water Resources Research}, month = {03}, note = {e2020WR029361 2020WR029361}, pages = {e2020WR029361}, publisher = {American Geophysical Union (AGU)}, title = {Experimental Methods and Imaging for Enzymatically Induced Calcite Precipitation in a microfluidic cell}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020WR029361}, volume = 57, year = 2021 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020WR029361
11. Lunowa, S. B., Bringedal, C., & Pop, I. S. (2021). On an averaged model for immiscible two-phase flow with surface tension and dynamic contact angle in a thin strip. Studies in Applied Mathematics, 147, Article 1. https://doi.org/10.1111/sapm.12376
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  @article{LunowaUpscaling, abstract = {We consider a model for the flow of two immiscible fluids in a two-dimensional thin strip of varying width. This represents an idealization of a pore in a porous medium. The interface separating the fluids forms a freely moving interface in contact with the wall and is driven by the fluid flow and surface tension. The contact-line model incorporates Navier-slip boundary conditions and a dynamic and possibly hysteretic contact angle law. We assume a scale separation between the typical width and the length of the thin strip. Based on asymptotic expansions, we derive effective models for the two-phase flow. These models form a system of differential algebraic equations for the interface position and the total flux. The result is Darcy-type equations for the flow, combined with a capillary pressure–saturation relationship involving dynamic effects. Finally, we provide some numerical examples to show the effect of a varying wall width, of the viscosity ratio, of the slip boundary condition as well as of having a dynamic contact angle law.}, author = {Lunowa, Stephan B. and Bringedal, Carina and Pop, Iuliu Sorin}, doi = {10.1111/sapm.12376}, eprint = {https://onlinelibrary.wiley.com/doi/pdf/10.1111/sapm.12376}, journal = {Studies in Applied Mathematics}, month = {04}, number = 1, pages = {84-126}, title = {On an averaged model for immiscible two-phase flow with surface tension and dynamic contact angle in a thin strip}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/sapm.12376}, volume = 147, year = 2021 }
  Link
  https://onlinelibrary.wiley.com/doi/abs/10.1111/sapm.12376
12. Chu, X., Wang, W., Yang, G., Terzis, A., Helmig, R., & Weigand, B. (2021). Transport of Turbulence Across Permeable Interface in a Turbulent Channel Flow: Interface-Resolved Direct Numerical Simulation. Transport in Porous Media, 136, Article 1. https://doi.org/10.1007/s11242-020-01506-w
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  @article{chu_transport_2021, abstract = {Turbulence transportation across permeable interfaces is investigated using direct numerical simulation, and the connection between the turbulent surface flow and the pore flow is explored. The porous media domain is constructed with an in-line arranged circular cylinder array. The effects of Reynolds number and porosity are also investigated by comparing cases with two Reynolds numbers (\$\$Re{\textbackslash}approx 3000,6000\$\$) and two porosities (\$\${\textbackslash}varphi =0.5,0.8\$\$). It was found that the change of porosity leads to the variation of flow motions near the interface region, which further affect turbulence transportation below the interface. The turbulent kinetic energy (TKE) budget shows that turbulent diffusion and pressure transportation work as energy sink and source alternatively, which suggests a possible route for turbulence transferring into porous region. Further analysis on the spectral TKE budget reveals the role of modes of different wavelengths. A major finding is that mean convection not only affects the distribution of TKE in spatial space, but also in scale space. The permeability of the wall also have an major impact on the occurrence ratio between blow and suction events as well as their corresponding flow structures, which can be related to the change of the Kármán constant of the mean velocity profile.}, author = {Chu, Xu and Wang, Wenkang and Yang, Guang and Terzis, Alexandros and Helmig, Rainer and Weigand, Bernhard}, doi = {10.1007/s11242-020-01506-w}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {01}, number = 1, pages = {165--189}, title = {Transport of Turbulence Across Permeable Interface in a Turbulent Channel Flow: Interface-Resolved Direct Numerical Simulation}, url = {https://doi.org/10.1007/s11242-020-01506-w}, volume = 136, year = 2021 }
  Link
  https://doi.org/10.1007/s11242-020-01506-w
13. Anzt, H., Bach, F., Druskat, S., Löffler, F., Loewe, A., Renard, B., Seemann, G., Struck, A., Achhammer, E., Aggarwal, P., Appel, F., Bader, M., Brusch, L., Busse, C., Chourdakis, G., Dabrowski, P., Ebert, P., Flemisch, B., Friedl, S., et al. (2021). An environment for sustainable research software in Germany and beyond: current state, open challenges, and call for action version 2; peer review: 2 approved. F1000Research, 9, Article 295. https://doi.org/10.12688/f1000research.23224.2
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  BibTeX
  @article{10.12688/f1000research.23224.2, author = {Anzt, H and Bach, F and Druskat, S and Löffler, F and Loewe, A and Renard, BY and Seemann, G and Struck, A and Achhammer, E and Aggarwal, P and Appel, F and Bader, M and Brusch, L and Busse, C and Chourdakis, G and Dabrowski, PW and Ebert, P and Flemisch, B and Friedl, S and Fritzsch, B and Funk, MD and Gast, V and Goth, F and Grad, JN and Hegewald, J and Hermann, S and Hohmann, F and Janosch, S and Kutra, D and Linxweiler, J and Muth, T and Peters-Kottig, W and Rack, F and Raters, FHC and Rave, S and Reina, G and Reißig, M and Ropinski, T and Schaarschmidt, J and Seibold, H and Thiele, JP and Uekermann, B and Unger, S and Weeber, R}, doi = {10.12688/f1000research.23224.2}, journal = {F1000Research}, month = {01}, number = 295, title = {An environment for sustainable research software in Germany and beyond: current state, open challenges, and call for action [version 2; peer review: 2 approved] }, volume = 9, year = 2021 }
14. Ackermann, S., Bringedal, C., & Helmig, R. (2021). Multi-scale three-domain approach for coupling free flow and flow in porous media including droplet-related interface processes. Journal of Computational Physics, 429, 109993. https://doi.org/10.1016/j.jcp.2020.109993
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  @article{ackermann-bringedal-helmig-2021, abstract = {Drops on a free-flow/porous-medium-flow interface have a strong influence on the exchange of mass, momentum and energy between the two macroscopic flow regimes. Modeling droplet-related pore-scale processes in a macro-scale context is challenging due to the scale gap, but might be rewarding due to relatively low computational costs. We develop a three-domain approach to model drop formation, growth, detachment and film flow in a lower-dimensional interface domain. A simple upscaling technique allows to compute the drop-covered interface area fraction which affects the coupling fluxes. In a first scenario, only drop formation, growth and detachment are taken into account. Then, spreading and merging due to lateral fluxes are considered as well. The simulation results show that the impact of these droplet-related processes can be captured. However, extensions are necessary to represent the influence on the free flow more precisely.}, author = {Ackermann, Sina and Bringedal, Carina and Helmig, Rainer}, doi = {https://doi.org/10.1016/j.jcp.2020.109993}, issn = {0021-9991}, journal = {Journal of Computational Physics}, month = {03}, pages = 109993, publisher = {Elsevier BV}, title = {Multi-scale three-domain approach for coupling free flow and flow in porous media including droplet-related interface processes}, url = {http://www.sciencedirect.com/science/article/pii/S0021999120307671}, volume = 429, year = 2021 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0021999120307671
15. Gao, B., Coltman, E., Farnsworth, J., Helmig, R., & Smits, K. M. (2021). Determination of Vapor and Momentum Roughness Lengths Above an Undulating Soil Surface Based on PIV-Measured Velocity Profiles. Water Resources Research, 57, Article 7. https://doi.org/10.1029/2021WR029578
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  @article{gao2021a, abstract = {Abstract Accurately predicting bare-soil evaporation requires the proper characterization of the near-surface atmospheric conditions. These conditions, dependent on factors such as surface microtopography and wind velocity, vary greatly and therefore require high-resolution datasets to be fully incorporated into evaporation models. These factors are oftentimes parameterized in models through the aerodynamic resistance (ra), in which the vapor roughness length (z0v) and the momentum roughness length (z0m) are two crucial parameters that describe the transport near the soil-atmosphere interface. Typically, when evaluating bare-soil evaporation, these two characteristic lengths are assumed equal, although differences are likely to occur especially in turbulent flows over undulating surfaces. Thus, this study aims to investigate the relationship between z0v and z0m above undulating surfaces to ultimately improve accuracy in estimating evaporation rate. To achieve this goal, four uniquely designed wind tunnel—soil tank experiments were conducted considering different wind speeds and undulation spacings. Particle image velocimetry (PIV) was used to measure the velocity field above the undulating surface in high resolution. Using the high-fidelity data set, the logarithmic ratio of z0v to z0m is determined and used to estimate ra. Results confirm that these lengths differ significantly, with the logarithmic ratio roughly ranging from −15 to −5 under the conditions tested. PIV-measured results demonstrate this ratio is closely tied to the mass and momentum transport behaviors influenced by surface undulations. Using the data-integrated formulation of ra, predictions of evaporation rate were prepared for both the laboratory and lysimeter experiments, demonstrating the efficacy of the proposed approach in this study.}, author = {Gao, Bo and Coltman, Edward and Farnsworth, John and Helmig, Rainer and Smits, Kathleen M.}, doi = {10.1029/2021WR029578}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2021WR029578}, journal = {Water Resources Research}, month = {06}, number = 7, pages = {e2021WR029578}, title = {Determination of Vapor and Momentum Roughness Lengths Above an Undulating Soil Surface Based on PIV-Measured Velocity Profiles}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR029578}, volume = 57, year = 2021 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR029578
16. Seitz, G., Mohammadi, F., & Class, H. (2021). Thermochemical Heat Storage in a Lab-Scale Indirectly Operated CaO/Ca(OH)2 Reactor - Numerical Modeling and Model Validation through Inverse Parameter Estimation. Applied Sciences, 11, Article 2. https://doi.org/10.3390/app11020682
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  @article{Seitz2021-01, abstract = {Calcium oxide/Calcium hydroxide can be utilized as a reaction system for thermochemical heat storage. It features a high storage capacity, is cheap, and does not involve major environmental concerns. Operationally, different fixed-bed reactor concepts can be distinguished; direct reactor are characterized by gas flow through the reactive bulk material, while in indirect reactors, the heat-carrying gas flow is separated from the bulk material. This study puts a focus on the indirectly operated fixed-bed reactor setup. The fluxes of the reaction fluid and the heat-carrying flow are decoupled in order to overcome limitations due to heat conduction in the reactive bulk material. The fixed bed represents a porous medium where Darcy-type flow conditions can be assumed. Here, a numerical model for such a reactor concept is presented, which has been implemented in the software DuMux. An attempt to calibrate and validate it with experimental results from the literature is discussed in detail. This allows for the identification of a deficient insulation of the experimental setup. Accordingly, heat-loss mechanisms are included in the model. However, it can be shown that heat losses alone are not sufficient to explain the experimental results. It is evident that another effect plays a role here. Using Bayesian inference, this effect is identified as the reaction rate decreasing with progressing conversion of reactive material. The calibrated model reveals that more heat is lost over the reactor surface than transported in the heat transfer channel, which causes a considerable speed-up of the discharge reaction. An observed deceleration of the reaction rate at progressed conversion is attributed to the presence of agglomerates of the bulk material in the fixed bed. This retardation is represented phenomenologically by mofifying the reaction kinetics. After the calibration, the model is validated with a second set of experimental results. To speed up the calculations for the calibration, the numerical model is replaced by a surrogate model based on Polynomial Chaos Expansion and Principal Component Analysis.}, article-number = {682}, author = {Seitz, Gabriele and Mohammadi, Farid and Class, Holger}, doi = {10.3390/app11020682}, issn = {2076-3417}, journal = {Applied Sciences}, month = {01}, number = 2, pages = 682, publisher = {MDPI AG}, title = {Thermochemical Heat Storage in a Lab-Scale Indirectly Operated CaO/Ca(OH)2 Reactor - Numerical Modeling and Model Validation through Inverse Parameter Estimation}, url = {https://www.mdpi.com/2076-3417/11/2/682}, volume = 11, year = 2021 }
  Link
  https://www.mdpi.com/2076-3417/11/2/682
17. Bastidas, M., Bringedal, C., Pop, I. S., & Radu, F. A. (2021). Numerical homogenization of non-linear parabolic problems on adaptive meshes. Journal of Computational Physics, 425, 109903. https://doi.org/10.1016/j.jcp.2020.109903
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  @article{lh2-2021-bringedal-homogenization, abstract = {We propose an efficient numerical strategy for solving non-linear parabolic problems defined in a heterogeneous porous medium. This scheme is based on the classical homogenization theory and uses a locally mass-conservative formulation at different scales. In addition, we discuss some properties of the proposed non-linear solvers and use an error indicator to perform a local mesh refinement. The main idea is to compute the effective parameters in such a way that the computational complexity is reduced but preserving the accuracy. We illustrate the behavior of the homogenization scheme and of the non-linear solvers by performing two numerical tests. We consider both a quasi-periodic example and a problem involving strong heterogeneities in a non-periodic medium.}, author = {Bastidas, Manuela and Bringedal, Carina and Pop, Iuliu Sorin and Radu, Florin Adrian}, doi = {https://doi.org/10.1016/j.jcp.2020.109903}, issn = {0021-9991}, journal = {Journal of Computational Physics}, month = {01}, pages = 109903, title = {Numerical homogenization of non-linear parabolic problems on adaptive meshes}, url = {http://www.sciencedirect.com/science/article/pii/S002199912030677X}, volume = 425, year = 2021 }
  Link
  http://www.sciencedirect.com/science/article/pii/S002199912030677X
18. Wang, W., Chu, X., Lozano-Durán, A., Helmig, R., & Weigand, B. (2021). Information transfer between turbulent boundary layers and porous media. Journal of Fluid Mechanics, 920, A21. https://doi.org/10.1017/jfm.2021.445
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  @article{wang_information_2021, abstract = {The interaction between the flow above and below a permeable wall is a central topic in the study of porous media. While previous investigations have provided compelling evidence of the strong coupling between the two regions, few studies have quantitatively measured the directionality, i.e. cause-and-effect relations, of this interaction. To shed light on the problem, interface-resolved direct numerical simulations of channel flow over a cylinder array for porosity \${\textbackslash}varphi =0.4\$–\$0.9\$ are performed, and the friction Reynolds number of the top smooth wall is controlled to be \$Re\_\{{\textbackslash}tau \}{\textbackslash}approx 180\$. We use transfer entropy as a marker to evaluate the causal interaction between the free turbulent flow and the porous medium. Correlation analysis and linear coherence spectra are also leveraged to complete the study. Our results show that the permeability of the porous medium has a profound impact on the intensity, time scale and spatial extent of surface–subsurface interactions. The interaction of the free flow and porous medium is further decomposed into two coupling directions, namely, top-down and bottom-up. For low-porosity cases, top-down and bottom-up interactions are strongly asymmetric, the former being mostly influenced by small near-wall eddies, and the latter reflecting the onset of Kelvin–Helmholtz type instabilities due to the perturbation from the porous medium. As the porosity increases, both top-down and bottom-up interactions are dominated by shear-flow instabilities.}, author = {Wang, Wenkang and Chu, Xu and Lozano-Durán, Adrián and Helmig, Rainer and Weigand, Bernhard}, doi = {10.1017/jfm.2021.445}, issn = {0022-1120}, journal = {Journal of Fluid Mechanics}, note = {Edition: 2021/06/10Publisher: Cambridge University Press}, pages = {A21}, title = {Information transfer between turbulent boundary layers and porous media}, url = {https://www.cambridge.org/core/article/information-transfer-between-turbulent-boundary-layers-and-porous-media/6791BFCED29848AD37FA3B4D4AA5B684}, volume = 920, year = 2021 }
  Link
  https://www.cambridge.org/core/article/information-transfer-between-turbulent-boundary-layers-and-porous-media/6791BFCED29848AD37FA3B4D4AA5B684
19. Koch, T., Weishaupt, K., Müller, J., Weigand, B., & Helmig, R. (2021). A (Dual) Network Model for Heat Transfer in Porous Media. Transport in Porous Media, 140, Article 1. https://doi.org/10.1007/s11242-021-01602-5
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  @article{koch_dual_2021, abstract = {We present a dual network model to simulate coupled single-phase flow and energy transport in porous media including conditions under which local thermal equilibrium cannot be assumed. The models target applications such as the simulation of catalytic reactors, micro-fluidic experiments, or micro-cooling devices. The new technique is based on a recently developed algorithm that extracts both the pore space and the solid grain matrix of a porous medium from CT images into an interconnected network representation. We simulate coupled heat and mass transfer in these networks simultaneously, allowing naturally to model scenarios with heterogeneous temperature distributions in both void space and solid matrix. The model is compared with 3D conjugate heat transfer simulations for both conduction- and convection-dominated scenarios. It is shown to reproduce effective thermal conductivities over a wide range of fluid to solid thermal conductivity ratios with a single parameter set. Morevoer, it captures local thermal nonequilibrium effects in a micro-cooling device scenario.}, author = {Koch, Timo and Weishaupt, Kilian and Müller, Johannes and Weigand, Bernhard and Helmig, Rainer}, doi = {10.1007/s11242-021-01602-5}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {10}, number = 1, pages = {107--141}, title = {A (Dual) Network Model for Heat Transfer in Porous Media}, url = {https://doi.org/10.1007/s11242-021-01602-5}, volume = 140, year = 2021 }
  Link
  https://doi.org/10.1007/s11242-021-01602-5
20. Ahmadi, N., Heck, K., Rolle, M., Helmig, R., & Mosthaf, K. (2021). On multicomponent gas diffusion and coupling concepts for porous media and free flow: a benchmark study. Computational Geosciences, 25, Article 5. https://doi.org/10.1007/s10596-021-10057-y
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  @article{ahmadi_multicomponent_2021, abstract = {Multicomponent gas transport in porous media and at the interface between porous media and free flow occurs in a wide range of technical and environmental systems. Modeling tools are required for the quantitative description of such coupled environmental compartments. We present a benchmark study to compare different diffusion models as well as different coupling concepts employed for the description of multicomponent gas flow and transport at the porous medium/free-flow interface. The benchmark problems allowed us to compare two diffusion models (Fickian and Maxwell-Stefan formulations) for predicting the transport behavior of multicomponent mixtures in porous media and in presence of a free flow. The examples highlighted the importance of interaction between different diffusing components by applying the Maxwell-Stefan formulation, as well as the impact of the free flow velocity on gas migration at the interface under diffusion- and advection-dominated conditions. The problems were solved using two simulation tools, incorporating different coupling concepts to describe the physics of flow and transport processes. In COMSOL Multiphysics, we implemented a single-domain Brinkman approach, whereas in the DuMuX simulator we used a two-domain approach with the Navier-Stokes equation for the free flow and Darcy’s law for the porous medium. Also, the formulation of the Maxwell-Stefan equation for multicomponent transport was different between the two codes. Despite the different modeling concepts, mathematical descriptions and numerical schemes implemented in the two simulators, their outcomes demonstrate excellent agreement for all benchmark problems, as well as the capability to reproduce the results of previous modeling and experimental studies.}, author = {Ahmadi, Navid and Heck, Katharina and Rolle, Massimo and Helmig, Rainer and Mosthaf, Klaus}, doi = {10.1007/s10596-021-10057-y}, issn = {1573-1499}, journal = {Computational Geosciences}, month = {10}, number = 5, pages = {1493--1507}, title = {On multicomponent gas diffusion and coupling concepts for porous media and free flow: a benchmark study}, url = {https://doi.org/10.1007/s10596-021-10057-y}, volume = 25, year = 2021 }
  Link
  https://doi.org/10.1007/s10596-021-10057-y
21. Bastidas Olivares, M., Bringedal, C., & Pop, I. S. (2021). A two-scale iterative scheme for a phase-field model for precipitation and dissolution in porous media. Applied Mathematics and Computation, 396, 125933. https://doi.org/10.1016/j.amc.2020.125933
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  @article{BASTIDASOLIVARES2021125933, abstract = {Mineral precipitation and dissolution processes in a porous medium can alter the structure of the medium at the scale of pores. Such changes make numerical simulations a challenging task as the geometry of the pores changes in time in an apriori unknown manner. To deal with such aspects, we here adopt a two-scale phase-field model, and propose a robust scheme for the numerical approximation of the solution. The scheme takes into account both the scale separation in the model, as well as the non-linear character of the model. After proving the convergence of the scheme, an adaptive two-scale strategy is incorporated, which improves the efficiency of the simulations. Numerical tests are presented, showing the efficiency and accuracy of the scheme in the presence of anisotropies and heterogeneities.}, author = {Bastidas Olivares, Manuela and Bringedal, Carina and Pop, Iuliu Sorin}, doi = {https://doi.org/10.1016/j.amc.2020.125933}, issn = {0096-3003}, journal = {Applied Mathematics and Computation}, month = {05}, pages = 125933, title = {A two-scale iterative scheme for a phase-field model for precipitation and dissolution in porous media}, url = {http://www.sciencedirect.com/science/article/pii/S0096300320308869}, volume = 396, year = 2021 }
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  http://www.sciencedirect.com/science/article/pii/S0096300320308869
22. Class, H., Bürkle, P., Sauerborn, T., Trötschler, O., Strauch, B., & Zimmer, M. (2021). On the Role of Density-Driven Dissolution of CO2 in Phreatic Karst Systems. Water Resources Research, 57, Article 12. https://doi.org/10.1029/2021WR030912
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  @article{lh2-2021-class-cave-halle, abstract = {Abstract Density-driven dissolution of carbon dioxide in water is a well-known and much described mechanism in geological sequestration of this greenhouse gas. It is remarkable that such enhanced dissolution does not receive attention in karst hydrology and speleology. Models and hypotheses on karst development are complex and consider many different processes. We focus here on the influence of CO2 partial gas pressures at the interface between atmosphere and karst water on the dynamics of dissolved CO2 concentrations below the water table. Seasonal variations of microbial soil activity and root respiration or barometric-pressure changes cause fluctuations in CO2 partial pressures. Dependent on the existence and strength of a karst-water background flow, fingering regimes might be triggered causing enhanced dissolution of CO2. This allows replenishment of CO2, and, thus, dissolutional power even deep in the water body without the need for percolating water to transport dissolved CO2. We present and discuss simplified and generic experimental and computational scenarios to strengthen our claim, and we try to give answers to: how much? and under which circumstances? The applied numerical model solves the Navier-Stokes equation with water density dependent on CO2 concentration and temperature. We show that calculated CO2 mass fluxes into the water bodies are dependent on the ratio of Péclet to Rayleigh numbers (Pe/Ra) and show a local minimum around Pe/Ra = 1, i.e. when natural and forced convection are about equal. Concluding, we claim that there is sufficient reason to consider density-driven dissolution as a process of relevance in karstification if circumstances are given.}, author = {Class, H. and Bürkle, P. and Sauerborn, T. and Trötschler, O. and Strauch, B. and Zimmer, M.}, doi = {https://doi.org/10.1029/2021WR030912}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2021WR030912}, journal = {Water Resources Research}, note = {e2021WR030912 2021WR030912}, number = 12, pages = {e2021WR030912}, title = {On the Role of Density-Driven Dissolution of CO2 in Phreatic Karst Systems}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR030912}, volume = 57, year = 2021 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR030912
2020
1. Seitz, G., Helmig, R., & Class, H. (2020). A numerical modeling study on the influence of porosity changes during thermochemical heat storage. Applied Energy, 259, 114152. https://doi.org/10.1016/j.apenergy.2019.114152
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  @article{Seitz-Seitz-2020-01, author = {Seitz, Gabriele and Helmig, Rainer and Class, Holger}, doi = {10.1016/j.apenergy.2019.114152}, issn = {0306-2619}, journal = {Applied Energy}, month = {02}, pages = 114152, title = {A numerical modeling study on the influence of porosity changes during thermochemical heat storage}, url = {http://www.sciencedirect.com/science/article/pii/S0306261919318392}, volume = 259, year = 2020 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0306261919318392
2. Schneider, M., Weishaupt, K., Gläser, D., Boon, W. M., & Helmig, R. (2020). Coupling staggered-grid and MPFA finite volume methods for free flow/porous-medium flow problems. Journal of Computational Physics, 401. https://doi.org/10.1016/j.jcp.2019.109012
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  @article{schneider.etAl2019, author = {Schneider, M. and Weishaupt, K. and Gläser, D. and Boon, W. M. and Helmig, R.}, doi = {https://doi.org/10.1016/j.jcp.2019.109012}, issn = {0021-9991}, journal = {Journal of Computational Physics}, title = {Coupling staggered-grid and MPFA finite volume methods for free flow/porous-medium flow problems}, volume = 401, year = 2020 }
3. Schneider, M., Flemisch, B., Frey, S., Hermann, S., Iglezakis, D., Ruf, M., Schembera, B., Seeland, A., & Steeb, H. (2020). Datenmanagement im SFB 1313. Bausteine Forschungsdatenmanagement, 3, Article 1. https://doi.org/10.17192/bfdm.2020.1.8085
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  @article{Schneider:2020:DIS, author = {Schneider, Martin and Flemisch, Bernd and Frey, Steffen and Hermann, Sibylle and Iglezakis, Dorothea and Ruf, Matthias and Schembera, Björn and Seeland, Anett and Steeb, Holger}, doi = {10.17192/bfdm.2020.1.8085}, journal = {Bausteine Forschungsdatenmanagement}, language = {de}, month = {04}, number = 1, pages = {28-38}, publisher = {Philipps-Universität Marburg}, title = {Datenmanagement im SFB 1313}, url = {https://bausteine-fdm.de/article/view/8085}, volume = 3, year = 2020 }
  Link
  https://bausteine-fdm.de/article/view/8085
4. Ghosh, T., Bringedal, C., Helmig, R., & Sekhar, G. P. R. (2020). Upscaled equations for two-phase flow in highly heterogeneous porous media: Varying permeability and porosity. Advances in Water Resources, 145, 103716. https://doi.org/10.1016/j.advwatres.2020.103716
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  @article{Ghosh2020-01, author = {Ghosh, Tufan and Bringedal, Carina and Helmig, Rainer and Sekhar, G.P. Raja}, doi = {10.1016/j.advwatres.2020.103716}, journal = {Advances in Water Resources}, month = {11}, pages = 103716, publisher = {Elsevier {BV}}, title = {Upscaled equations for two-phase flow in highly heterogeneous porous media: Varying permeability and porosity}, url = {https://doi.org/10.1016/j.advwatres.2020.103716}, volume = 145, year = 2020 }
  Link
  https://doi.org/10.1016/j.advwatres.2020.103716
5. de Winter, M., Weishaupt, K., Scheller, S., Frey, S., Raoof, A., Hassanizadeh, M., & Helmig, R. (2020). The Complexity of Porous Media Flow Characterized in a Microfluidic Model Based on Confocal Laser Scanning Microscopy and Micro-PIV. Transport in Porous Media. https://doi.org/10.1007/s11242-020-01515-9
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  @article{de_winter_complexity_2020, abstract = {In this study, the complexity of a steady-state flow through porous media is revealed using confocal laser scanning microscopy (CLSM). Micro-particle image velocimetry (micro-PIV) is applied to construct movies of colloidal particles. The calculated velocity vector fields from images are further utilized to obtain laminar flow streamlines. Fluid flow through a single straight channel is used to confirm that quantitative CLSM measurements can be conducted. Next, the coupling between the flow in a channel and the movement within an intersecting dead-end region is studied. Quantitative CLSM measurements confirm the numerically determined coupling parameter from earlier work of the authors. The fluid flow complexity is demonstrated using a porous medium consisting of a regular grid of pores in contact with a flowing fluid channel. The porous media structure was further used as the simulation domain for numerical modeling. Both the simulation, based on solving Stokes equations, and the experimental data show presence of non-trivial streamline trajectories across the pore structures. In view of the results, we argue that the hydrodynamic mixing is a combination of non-trivial streamline routing and Brownian motion by pore-scale diffusion. The results provide insight into challenges in upscaling hydrodynamic dispersion from pore scale to representative elementary volume (REV) scale. Furthermore, the successful quantitative validation of CLSM-based data from a microfluidic model fed by an electrical syringe pump provided a valuable benchmark for qualitative validation of computer simulation results.}, author = {de Winter, Matthijs and Weishaupt, Kilian and Scheller, Stefan and Frey, Steffen and Raoof, Amir and Hassanizadeh, Majid and Helmig, Rainer}, doi = {10.1007/s11242-020-01515-9}, issn = {1573-1634}, journal = {Transport in Porous Media}, language = {en}, month = {11}, publisher = {Springer Science and Business Media {LLC}}, title = {The Complexity of Porous Media Flow Characterized in a Microfluidic Model Based on Confocal Laser Scanning Microscopy and Micro-{PIV}}, url = {https://doi.org/10.1007/s11242-020-01515-9}, urldate = {2020-11-27}, year = 2020 }
  Link
  https://doi.org/10.1007/s11242-020-01515-9
6. Beck, M., Rinaldi, A. P., Flemisch, B., & Class, H. (2020). Accuracy of fully coupled and sequential approaches for modeling hydro- and geomechanical processes. Computational Geosciences, 24, Article 4. https://doi.org/10.1007/s10596-020-09987-w
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  @article{beck_accuracy_2020, abstract = {Subsurface flow and geomechanics are often modeled with sequential approaches. This can be computationally beneficial compared with fully coupled schemes, while it requires usually compromises in numerical accuracy, at least when the sequential scheme is non-iterative. We discuss the influence of the choice of scheme on the numerical accuracy and the expected computational effort based on a comparison of a fully coupled scheme, a scheme employing a one-way coupling, and an iterative scheme using a fixed-stress split for two subsurface injection scenarios. All these schemes were implemented in the numerical simulator DuMux. This study identifies conditions of problem settings where differences due to the choice of the model approach are as important as differences in geologic features. It is shown that in particular transient and multiphase flow, effects can be causing significant deviations between non-iterative and iterative sequential schemes, which might be in the same order of magnitude as geologic uncertainty. An iterated fixed-stress split has the same numerical accuracy as a fully coupled scheme but only for a certain number of iterations which might use up the computational advantage of solving two smaller systems of equations rather than a big monolithical one.}, author = {Beck, M. and Rinaldi, A. P. and Flemisch, B. and Class, H.}, doi = {10.1007/s10596-020-09987-w}, issn = {1573-1499}, journal = {Computational Geosciences}, language = {en}, month = {08}, number = 4, pages = {1707--1723}, publisher = {Springer Science and Business Media {LLC}}, title = {Accuracy of fully coupled and sequential approaches for modeling hydro- and geomechanical processes}, url = {https://doi.org/10.1007/s10596-020-09987-w}, urldate = {2020-11-17}, volume = 24, year = 2020 }
  Link
  https://doi.org/10.1007/s10596-020-09987-w
7. Emmert, S., Davis, K., Gerlach, R., & Class, H. (2020). The Role of Retardation, Attachment and Detachment Processes during Microbial Coal-Bed Methane Production after Organic Amendment. Water, 12, Article 11. https://doi.org/10.3390/w12113008
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  BibTeX
  @article{emmert2020role, article-number = {3008}, author = {Emmert, Simon and Davis, Katherine and Gerlach, Robin and Class, Holger}, doi = {10.3390/w12113008}, issn = {2073-4441}, journal = {Water}, month = {10}, number = 11, publisher = {{MDPI} {AG}}, title = {The Role of Retardation, Attachment and Detachment Processes during Microbial Coal-Bed Methane Production after Organic Amendment}, url = {https://www.mdpi.com/2073-4441/12/11/3008}, volume = 12, year = 2020 }
  Link
  https://www.mdpi.com/2073-4441/12/11/3008
8. Emmert, S., Class, H., Davis, K. J., & Gerlach, R. (2020). Importance of specific substrate utilization by microbes in microbially enhanced coal-bed methane production: A modelling study. International Journal of Coal Geology, 229, 103567. https://doi.org/10.1016/j.coal.2020.103567
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  BibTeX
  @article{emmert2020importance, author = {Emmert, Simon and Class, Holger and Davis, Katherine J and Gerlach, Robin}, doi = {https://doi.org/10.1016/j.coal.2020.103567}, issn = {0166-5162}, journal = {International Journal of Coal Geology}, month = {09}, pages = 103567, publisher = {Elsevier}, title = {Importance of specific substrate utilization by microbes in microbially enhanced coal-bed methane production: A modelling study}, url = {http://www.sciencedirect.com/science/article/pii/S0166516220305632}, volume = 229, year = 2020 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0166516220305632
9. Hommel, J., Akyel, A., Frieling, Z., Phillips, A. J., Gerlach, R., Cunningham, A. B., & Class, H. (2020). A Numerical Model for Enzymatically Induced Calcium Carbonate Precipitation. Applied Sciences, 10, Article 13. https://doi.org/10.3390/app10134538
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  BibTeX
  @article{Hommel2020, author = {Hommel, Johannes and Akyel, Arda and Frieling, Zachary and Phillips, Adrienne J. and Gerlach, Robin and Cunningham, Alfred B. and Class, Holger}, doi = {10.3390/app10134538}, journal = {Applied Sciences}, month = {06}, number = 13, pages = 4538, title = {A Numerical Model for Enzymatically Induced Calcium Carbonate Precipitation}, volume = 10, year = 2020 }
10. Heck, K., Coltman, E., Schneider, J., & Helmig, R. (2020). Influence of Radiation on Evaporation Rates: A Numerical Analysis. Water Resources Research, 56, Article 10. https://doi.org/10.1029/2020WR027332
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  BibTeX
  @article{lh2-2020-heck-evaporation, author = {Heck, K. and Coltman, E. and Schneider, J. and Helmig, R.}, doi = {10.1029/2020WR027332}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2020WR027332}, journal = {Water Resources Research}, month = {10}, note = {e2020WR027332 10.1029/2020WR027332}, number = 10, pages = {e2020WR027332}, publisher = {American Geophysical Union ({AGU})}, title = {Influence of Radiation on Evaporation Rates: A Numerical Analysis}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020WR027332}, volume = 56, year = 2020 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020WR027332
11. Sharmin, S., Bringedal, C., & Pop, I. S. (2020). On upscaling pore-scale models for two-phase flow with evolving interfaces. Advances in Water Resources, 142, 103646. https://doi.org/10.1016/j.advwatres.2020.103646
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  BibTeX
  @article{lh2-2020-bringedal-on-upscaling, abstract = {The modelling and simulation of the unsaturated flow or the flow of two immiscible fluid phases in a porous medium is challenging as this flow takes place through the pores of the medium, which form a highly complex domain. Next to the complexity of the domain, a major challenge is to account for the interface separating the fluids, or the unsaturated fluid from the inert filling part, as the location of this interface is not known a-priori. The evolution of this interface depends on the flow of both fluids and of the surface tension. Moreover, the surface tension may depend on the concentration of a surfactant dissolved in one fluid phase. In this work, such aspects are taken into account, and effective, Darcy-scale models are derived based on the known physics at the pore scale. In this sense a thin strip is used as the representation of a single pore in the porous medium. The Darcy-scale models are derived for various regimes, accounting for different pore-scale processes. Numerical examples show that the upscaled models are a good approximation of the transversal average of the solution to the pore-scale models, as the ratio of the width and the length of the pore approaches zero.}, author = {Sharmin, Sohely and Bringedal, Carina and Pop, Iuliu Sorin}, doi = {10.1016/j.advwatres.2020.103646}, issn = {0309-1708}, journal = {Advances in Water Resources}, month = {08}, pages = 103646, publisher = {Elsevier {BV}}, title = {On upscaling pore-scale models for two-phase flow with evolving interfaces}, url = {https://www.sciencedirect.com/science/article/pii/S0309170819312928}, volume = 142, year = 2020 }
  Link
  https://www.sciencedirect.com/science/article/pii/S0309170819312928
12. Koch, T., Flemisch, B., Helmig, R., Wiest, R., & Obrist, D. (2020). A multi-scale sub-voxel perfusion model to estimate diffusive capillary wall conductivity in multiple sclerosis lesions from perfusion MRI data. International Journal for Numerical Methods in Biomedical Engineering, 36, Article 2. https://doi.org/10.1002/cnm.3298
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  BibTeX
  @article{Koch-Koch-2020-01, abstract = {Abstract We propose a new mathematical model to learn capillary leakage coefficients from dynamic susceptibility contrast MRI data. To this end, we derive an embedded mixed-dimension flow and transport model for brain tissue perfusion on a subvoxel scale. This model is used to obtain the contrast agent concentration distribution in a single MRI voxel during a perfusion MRI sequence. We further present a magnetic resonance signal model for the considered sequence including a model for local susceptibility effects. This allows modeling MR signal-time curves that can be compared with clinical MRI data. The proposed model can be used as a forward model in the inverse modeling problem of inferring model parameters such as the diffusive capillary wall conductivity. Acute multiple sclerosis lesions are associated with a breach in the integrity of the blood-brain barrier. Applying the model to perfusion MR data of a patient with acute multiple sclerosis lesions, we conclude that diffusive capillary wall conductivity is a good indicator for characterizing activity of lesions, even if other patient-specific model parameters are not well-known.}, author = {Koch, Timo and Flemisch, Bernd and Helmig, Rainer and Wiest, Roland and Obrist, Dominik}, copyright = {This article is protected by copyright. All rights reserved.}, doi = {10.1002/cnm.3298}, issn = {2040-7947}, journal = {International Journal for Numerical Methods in Biomedical Engineering}, language = {en}, number = 2, pages = {e3298}, title = {A multi-scale sub-voxel perfusion model to estimate diffusive capillary wall conductivity in multiple sclerosis lesions from perfusion {MRI} data}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/cnm.3298}, volume = 36, year = 2020 }
  Link
  https://onlinelibrary.wiley.com/doi/abs/10.1002/cnm.3298
13. Class, H., Weishaupt, K., & Trötschler, O. (2020). Experimental and Simulation Study on Validating a Numerical Model for CO2 Density-Driven Dissolution in Water. Water, 12, Article 3. https://doi.org/10.3390/w12030738
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  @article{class_experimental_2020, abstract = {Carbon dioxide density-driven dissolution in a water-filled laboratory flume of the dimensions 60 cm length, 40 cm height, 1 cm thickness, was visualized using a pH-sensitive color indicator. We focus on atmospheric pressure conditions, like in caves where CO2 concentrations are typically higher. Varying concentrations of carbon dioxide were applied as boundary conditions at the top of the experimental setup, leading to the onset of convective fingering at differing times. The data were used to validate a numerical model implemented in the numerical simulator DuMux. The model solves the Navier\–Stokes equations for density-induced water flow with concentration-dependent fluid density and a transport equation, including advective and diffusive processes for the carbon dioxide dissolved in water. The model was run in 2D, 3D, and pseudo-3D on two different grids. Without any calibration or fitting of parameters, the results of the comparison between experiment and simulation show satisfactory agreement with respect to the onset time of convective fingering, and the number and the dynamics of the fingers. Grid refinement matters, in particular, in the uppermost part where fingers develop. The 2D simulations consistently overestimated the fingering dynamics. This successful validation of the model is the prerequisite for employing it in situations with background flow and for a future study of karstification mechanisms related to CO2-induced fingering in caves.}, author = {Class, Holger and Weishaupt, Kilian and Trötschler, Oliver}, copyright = {http://creativecommons.org/licenses/by/3.0/}, doi = {10.3390/w12030738}, journal = {Water}, language = {en}, month = {03}, note = {Number: 3 publisher = {{MDPI} {AG}},Publisher: Multidisciplinary Digital Publishing Institute}, number = 3, pages = 738, title = {Experimental and Simulation Study on Validating a Numerical Model for CO2 Density-Driven Dissolution in Water}, url = {https://www.mdpi.com/2073-4441/12/3/738}, urldate = {2020-11-17}, volume = 12, year = 2020 }
  Link
  https://www.mdpi.com/2073-4441/12/3/738
14. Koch, T., Helmig, R., & Schneider, M. (2020). A new and consistent well model for one-phase flow in anisotropic porous media using a distributed source model. Journal of Computational Physics, 410, 109369. https://doi.org/10.1016/j.jcp.2020.109369
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  @article{Kochetal2020JCPwell, author = {Koch, Timo and Helmig, Rainer and Schneider, Martin}, doi = {https://doi.org/10.1016/j.jcp.2020.109369}, issn = {0021-9991}, journal = {Journal of Computational Physics}, month = {06}, pages = 109369, title = {A new and consistent well model for one-phase flow in anisotropic porous media using a distributed source model}, volume = 410, year = 2020 }
15. Koch, T., Schneider, M., Helmig, R., & Jenny, P. (2020). Modeling tissue perfusion in terms of 1d-3d embedded mixed-dimension coupled problems with distributed sources. Journal of Computational Physics, 410, 109370. https://doi.org/10.1016/j.jcp.2020.109370
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  @article{Kochetal2020JCP1d3dkernel, abstract = {We present a new method for modeling tissue perfusion on the capillary scale. The microvasculature is represented by a network of one-dimensional vessel segments embedded in the extra-vascular space. Vascular and extra-vascular space exchange fluid over the vessel walls. This exchange is modeled by distributed sources using smooth kernel functions for the extra-vascular domain. It is shown that the proposed method may significantly improve the approximation of the exchange flux, in comparison with existing methods for mixed-dimension embedded problems. Furthermore, the method exhibits better convergence rates of the relevant quantities due to the increased regularity of the extra-vascular pressure solution. Numerical experiments with a vascular network from the rat cortex show that the error in the approximation of the exchange flux for coarse grid resolutions may be decreased by a factor of 3. This may open the way for computing on larger network domains, where a fine grid resolution cannot be achieved in practical simulations due to constraints in computational resources, for example in the context of uncertainty quantification.}, author = {Koch, Timo and Schneider, Martin and Helmig, Rainer and Jenny, Patrick}, doi = {10.1016/j.jcp.2020.109370}, issn = {0021-9991}, journal = {Journal of Computational Physics}, month = {06}, pages = 109370, publisher = {Elsevier {BV}}, title = {Modeling tissue perfusion in terms of 1d-3d embedded mixed-dimension coupled problems with distributed sources}, url = {https://doi.org/10.1016/j.jcp.2020.109370}, volume = 410, year = 2020 }
  Link
  https://doi.org/10.1016/j.jcp.2020.109370
16. Oladyshkin, S., Mohammadi, F., Kroeker, I., & Nowak, W. (2020). Bayesian3 Active Learning for the Gaussian Process Emulator Using Information Theory. Entropy, 22, Article 8. https://doi.org/10.3390/e22080890
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  @article{OladyshkinMohammadi2020, author = {Oladyshkin, Sergey and Mohammadi, Farid and Kroeker, Ilja and Nowak, Wolfgang}, doi = {10.3390/e22080890}, journal = {Entropy}, month = {08}, number = 8, pages = 890, title = {Bayesian3 Active Learning for the Gaussian Process Emulator Using Information Theory}, url = {https://doi.org/10.3390/e22080890}, volume = 22, year = 2020 }
  Link
  https://doi.org/10.3390/e22080890
17. Coltman, E., Lipp, M., Vescovini, A., & Helmig, R. (2020). Obstacles, Interfacial Forms, and Turbulence: A Numerical Analysis of Soil-Water Evaporation Across Different Interfaces. Transport in Porous Media, 134, Article 2. https://doi.org/10.1007/s11242-020-01445-6
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  @article{lh2-2020-coltman-turbulence, author = {Coltman, E. and Lipp, M. and Vescovini, A. and Helmig, R.}, doi = {10.1007/s11242-020-01445-6}, journal = {Transport in porous media}, month = {07}, number = 2, pages = {275--301}, publisher = {Springer Science and Business Media {LLC}}, title = {Obstacles, Interfacial Forms, and Turbulence: A Numerical Analysis of Soil-Water Evaporation Across Different Interfaces}, url = {https://doi.org/10.1007/s11242-020-01445-6}, volume = 134, year = 2020 }
  Link
  https://doi.org/10.1007/s11242-020-01445-6
18. Weishaupt, K., Terzis, A., Zarikos, I., Yang, G., Flemisch, B., de Winter, D. A. M., & Helmig, R. (2020). A Hybrid-Dimensional Coupled Pore-Network/Free-Flow Model Including Pore-Scale Slip and Its Application to a Micromodel Experiment. Transport in Porous Media, 135, Article 1. https://doi.org/10.1007/s11242-020-01477-y
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  BibTeX
  @article{Weishaupt2020, author = {Weishaupt, K. and Terzis, A. and Zarikos, I. and Yang, G. and Flemisch, B. and de Winter, D. A. M. and Helmig, R.}, doi = {10.1007/s11242-020-01477-y}, journal = {Transport in Porous Media}, month = {09}, number = 1, pages = {243--270}, publisher = {Springer Science and Business Media {LLC}}, title = {A Hybrid-Dimensional Coupled Pore-Network/Free-Flow Model Including Pore-Scale Slip and Its Application to a Micromodel Experiment}, url = {https://doi.org/10.1007/s11242-020-01477-y}, volume = 135, year = 2020 }
  Link
  https://doi.org/10.1007/s11242-020-01477-y
19. Agélas, L., Schneider, M., Enchéry, G., & Flemisch, B. (2020). Convergence of nonlinear finite volume schemes for two-phase porous media flow on general meshes. IMA Journal of Numerical Analysis. https://doi.org/10.1093/imanum/draa064
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  @article{agelas2020, abstract = {{In this work we present an abstract finite volume discretization framework for incompressible immiscible two-phase flow through porous media. A priori error estimates are derived that allow us to prove the existence of discrete solutions and to establish the proof of convergence for schemes belonging to this framework. In contrast to existing publications the proof is not restricted to a specific scheme and it assumes neither symmetry nor linearity of the flux approximations. Two nonlinear schemes, namely a nonlinear two-point flux approximation and a nonlinear multipoint flux approximation, are presented, and some properties of these schemes, e.g. saturation bounds, are proven. Furthermore, the numerical behavior of these schemes (e.g. accuracy, coercivity, efficiency or saturation bounds) is investigated for different test cases for which the coercivity is checked numerically.}}, author = {Agélas, Léo and Schneider, Martin and Enchéry, Guillaume and Flemisch, Bernd}, doi = {10.1093/imanum/draa064}, eprint = {https://academic.oup.com/imajna/advance-article-pdf/doi/10.1093/imanum/draa064/33841699/draa064.pdf}, issn = {0272-4979}, journal = {IMA Journal of Numerical Analysis}, month = {10}, note = {draa064}, title = {{Convergence of nonlinear finite volume schemes for two-phase porous media flow on general meshes}}, url = {https://doi.org/10.1093/imanum/draa064}, year = 2020 }
  Link
  https://doi.org/10.1093/imanum/draa064
20. Gläser, D., Flemisch, B., Class, H., & Helmig, R. (2020). Frackit: a framework for stochastic fracture network generation and analysis. Journal of Open Source Software, 5. https://doi.org/10.21105/joss.02291
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  @article{frackit-2020-glaeser, author = {Gläser, Dennis and Flemisch, Bernd and Class, Holger and Helmig, Rainer}, doi = {10.21105/joss.02291}, journal = {Journal of Open Source Software}, month = {12}, page = {2291}, title = {Frackit: a framework for stochastic fracture network generation and analysis}, url = {https://joss.theoj.org/papers/10.21105/joss.02291}, volume = 5, year = 2020 }
  Link
  https://joss.theoj.org/papers/10.21105/joss.02291
21. Bahlmann, L. M., Smits, K. M., Heck, K., Coltman, E., Helmig, R., & Neuweiler, I. (2020). Gas Component Transport Across the Soil-Atmosphere Interface for Gases of Different Density: Experiments and Modeling. Water Resources Research, 56, Article 9. https://doi.org/10.1029/2020WR027600
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  @article{lh2-2020-heck-gas-component-transport, author = {Bahlmann, L. M. and Smits, K. M. and Heck, K. and Coltman, E. and Helmig, R. and Neuweiler, I.}, doi = {10.1029/2020WR027600}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2020WR027600}, journal = {Water Resources Research}, month = {09}, note = {e2020WR027600 10.1029/2020WR027600}, number = 9, pages = {e2020WR027600}, publisher = {American Geophysical Union ({AGU})}, title = {Gas Component Transport Across the Soil-Atmosphere Interface for Gases of Different Density: Experiments and Modeling}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020WR027600}, volume = 56, year = 2020 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020WR027600
22. Bringedal, C., von Wolff, L., & Pop, I. S. (2020). Phase Field Modeling of Precipitation and Dissolution Processes in Porous Media: Upscaling and Numerical Experiments. Multiscale Modeling & Simulation, 18, Article 2. https://doi.org/10.1137/19M1239003
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  @article{lh2-2020-bringedal-phase-field-modelling, author = {Bringedal, Carina and von Wolff, Lars and Pop, Iuliu Sorin}, doi = {10.1137/19M1239003}, eprint = {https://doi.org/10.1137/19M1239003}, journal = {Multiscale Modeling {\&} Simulation}, month = {01}, number = 2, pages = {1076--1112}, publisher = {Society for Industrial {\&} Applied Mathematics ({SIAM})}, title = {Phase Field Modeling of Precipitation and Dissolution Processes in Porous Media: Upscaling and Numerical Experiments}, url = {https://doi.org/10.1137/19M1239003}, volume = 18, year = 2020 }
  Link
  https://doi.org/10.1137/19M1239003
23. Shokri-Kuehni, S. M. S., Raaijmakers, B., Kurz, T., Or, D., Helmig, R., & Shokri, N. (2020). Water Table Depth and Soil Salinization: From Pore-Scale Processes to Field-Scale Responses. Water Resources Research, 56, Article 2. https://doi.org/10.1029/2019WR026707
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  @article{doi:10.1029/2019WR026707, author = {Shokri-Kuehni, Salomé M. S. and Raaijmakers, Bernadette and Kurz, Theresa and Or, Dani and Helmig, Rainer and Shokri, Nima}, copyright = {©2020. American Geophysical Union. All Rights Reserved.}, doi = {10.1029/2019WR026707}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2019WR026707}, issn = {1944-7973}, journal = {Water Resources Research}, month = {01}, number = 2, pages = {e2019WR026707}, title = {{Water Table Depth and Soil Salinization: From Pore-Scale Processes to Field-Scale Responses}}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019WR026707}, urldate = {2020-02-13}, volume = 56, year = 2020 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019WR026707
2019
1. Weishaupt, K., Joekar-Niasar, V., & Helmig, R. (2019). An efficient coupling of free flow and porous media flow using the pore-network modeling approach. Journal of Computational Physics: X, 1, 100011. https://doi.org/10.1016/j.jcpx.2019.100011
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  BibTeX
  @article{Weishaupt-Weishaupt-2019-01, author = {Weishaupt, Kilian and Joekar-Niasar, Vahid and Helmig, Rainer}, doi = {10.1016/j.jcpx.2019.100011}, issn = {2590-0552}, journal = {Journal of Computational Physics: X}, month = {01}, pages = 100011, publisher = {Elsevier {BV}}, title = {An efficient coupling of free flow and porous media flow using the pore-network modeling approach}, url = {http://www.sciencedirect.com/science/article/pii/S2590055219300277}, volume = 1, year = 2019 }
  Link
  http://www.sciencedirect.com/science/article/pii/S2590055219300277
2. Yang, G., Terzis, A., Zarikos, I., Hassanizadeh, S. M., Weigand, B., & Helmig, R. (2019). Internal flow patterns of a droplet pinned to the hydrophobic surfaces of a confined microchannel using micro-PIV and VOF simulations. Chemical Engineering Journal, 370, 444–454. https://doi.org/10.1016/j.cej.2019.03.191
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  BibTeX
  @article{Helmig-Yang-2019-01, author = {Yang, Guang and Terzis, Alexandros and Zarikos, Ioannis and Hassanizadeh, S. Majid and Weigand, Bernhard and Helmig, Rainer}, doi = {10.1016/j.cej.2019.03.191}, issn = {1385-8947}, journal = {Chemical Engineering Journal}, month = {08}, pages = {444 - 454}, title = {Internal flow patterns of a droplet pinned to the hydrophobic surfaces of a confined microchannel using micro-PIV and VOF simulations}, url = {http://www.sciencedirect.com/science/article/pii/S1385894719306618}, volume = 370, year = 2019 }
  Link
  http://www.sciencedirect.com/science/article/pii/S1385894719306618
3. Bilke, L., Flemisch, B., Kalbacher, T., Kolditz, O., Helmig, R., & Nagel, T. (2019). Development of Open-Source Porous Media Simulators: Principles and Experiences. Transport in Porous Media, 130, Article 1. https://doi.org/10.1007/s11242-019-01310-1
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  BibTeX
  @article{Flemisch-Bilke-2019-01, author = {Bilke, Lars and Flemisch, Bernd and Kalbacher, Thomas and Kolditz, Olaf and Helmig, Rainer and Nagel, Thomas}, day = 01, doi = {10.1007/s11242-019-01310-1}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {10}, number = 1, pages = {337--361}, title = {Development of Open-Source Porous Media Simulators: Principles and Experiences}, url = {https://doi.org/10.1007/s11242-019-01310-1}, volume = 130, year = 2019 }
  Link
  https://doi.org/10.1007/s11242-019-01310-1
4. Gläser, D., Flemisch, B., Helmig, R., & Class, H. (2019). A hybrid-dimensional discrete fracture model for non-isothermal two-phase flow in fractured porous media. GEM - International Journal on Geomathematics, 10, Article 1. https://doi.org/10.1007/s13137-019-0116-8
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  @article{Glaeser-Glaeser-2019-01, author = {Gläser, Dennis and Flemisch, Bernd and Helmig, Rainer and Class, Holger}, doi = {10.1007/s13137-019-0116-8}, issn = {1869-2680}, journal = {GEM - International Journal on Geomathematics}, language = {en}, month = {01}, number = 1, pages = 5, title = {A hybrid-dimensional discrete fracture model for non-isothermal two-phase flow in fractured porous media}, url = {https://doi.org/10.1007/s13137-019-0116-8}, urldate = {2020-01-10}, volume = 10, year = 2019 }
  Link
  https://doi.org/10.1007/s13137-019-0116-8
5. Cunningham, A. B., Class, H., Ebigbo, A., Gerlach, R., Phillips, A., & Hommel, J. (2019). Field-scale modeling of microbially induced calcite precipitation. Computational Geosciences, tbd. https://doi.org/10.1007/s10596-018-9797-6
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  @article{NULL, author = {Cunningham, Alfred B. and Class, Holger and Ebigbo, Anozie and Gerlach, Robin and Phillips, Adrienne and Hommel, Johannes}, doi = {10.1007/s10596-018-9797-6}, journal = {Computational Geosciences}, month = {04}, note = {, IWS2ID=4551 , Partnerinstitution: Montana State University , Partneraddress: Bozeman, Montana, USA }, page = {tbd}, title = {Field-scale modeling of microbially induced calcite precipitation}, url = {http://link.springer.com/article/10.1007/s10596-018-9797-6}, volume = {tbd}, year = 2019 }
  Link
  http://link.springer.com/article/10.1007/s10596-018-9797-6
6. Yang, G., Coltman, E., Weishaupt, K., Terzis, A., Helmig, R., & Weigand, B. (2019). On the Beavers-Joseph interface condition for non-parallel coupled channel flow over a porous structure at high Reynolds numbers. Transport in Porous Media. https://doi.org/10.1007/s11242-019-01255-5
  - BibTeX
  BibTeX
  @article{NULL, author = {Yang, Guang and Coltman, Edward and Weishaupt, Kilian and Terzis, Alexandros and Helmig, Rainer and Weigand, Bernhard}, doi = {10.1007/s11242-019-01255-5}, journal = {Transport in Porous Media}, month = {02}, note = {, IWS2ID=4510 , Partnerinstitution: Institut für Thermodynamik der Luft- und Raumfahrt (ITLR) , Partneraddress: Stuttgart }, title = {On the Beavers-Joseph interface condition for non-parallel coupled channel flow over a porous structure at high Reynolds numbers}, year = 2019 }
7. Ghosh, T., Raja Sekhar, G. P., & Deb, D. (2019). Modeling of Co-current Spontaneous Imbibition Oil Recovery from Partially Covered Homogeneous Hydrocarbon Reservoir. Transport in Porous Media, 130, Article 3. https://doi.org/10.1007/s11242-019-01349-0
  - BibTeX
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  BibTeX
  @article{ghoshtipm2019, abstract = {In this paper, an approximate integral equation solution for a horizontal, unsteady flow of two viscous incompressible fluids is derived. Wettability variation of the porous medium is also considered in the present study. The non-wetting phase recovery fraction is obtained in terms of dimensionless time for 1D model from the derived solution. The derived approximate recovery fraction has been compared with the existing experimental data and empirical correlations for spontaneous imbibition from water-wet medium. It is observed that the normalized water saturation profiles show sharp gradients indicating some instability of the water front. Hence, a linear stability analysis is developed to study viscous instability of the co-current spontaneous imbibition. Viscous instability phenomenon for a two-phase oil–water system is also discussed. The corresponding instability number related to co-current imbibition recovery is estimated. The present study clearly spells out the effect of the instability number on the recovery process and estimates a critical instability number for co-current spontaneous imbibition.}, author = {Ghosh, Tufan and Raja Sekhar, G.P. and Deb, Debasis}, doi = {10.1007/s11242-019-01349-0}, journal = {Transport in Porous Media}, month = {12}, number = 3, page = {947–968}, publisher = {Springer Science and Business Media {LLC}}, title = {Modeling of Co-current Spontaneous Imbibition Oil Recovery from Partially Covered Homogeneous Hydrocarbon Reservoir}, url = {https://doi.org/10.1007/s11242-019-01349-0}, volume = 130, year = 2019 }
  Link
  https://doi.org/10.1007/s11242-019-01349-0
8. Zhuang, L., Hassanizadeh, S. M., van Duijn, C. J., Zimmermann, S., Zizina, I., & Helmig, R. (2019). Experimental and Numerical Studies of Saturation Overshoot during Infiltration into a Dry Soil. Vadose Zone Journal, 18, Article 1. https://doi.org/10.2136/vzj2018.09.0167
  - BibTeX
  - Link
  BibTeX
  @article{Helmig-Zuang-2019-01, author = {Zhuang, Luwen and Hassanizadeh, S. Majid and van Duijn, C.J. and Zimmermann, Susanne and Zizina, Irina and Helmig, Rainer}, doi = {10.2136/vzj2018.09.0167}, eprint = {https://acsess.onlinelibrary.wiley.com/doi/pdf/10.2136/vzj2018.09.0167}, journal = {Vadose Zone Journal}, month = {05}, number = 1, pages = 180167, title = {Experimental and Numerical Studies of Saturation Overshoot during Infiltration into a Dry Soil}, url = {https://acsess.onlinelibrary.wiley.com/doi/abs/10.2136/vzj2018.09.0167}, volume = 18, year = 2019 }
  Link
  https://acsess.onlinelibrary.wiley.com/doi/abs/10.2136/vzj2018.09.0167
9. Mitra, K., Köppl, T., Duijn, H. v., Pop, I. S., & Helmig, R. (2019). Fronts in two-phase porous media flow problems: the effects of hysteresis and dynamic capillarity. Studies in Applied Mathematics, 1906. https://research.tue.nl/en/publications/fronts-in-two-phase-porous-media-flow-problems-the-effects-of-hys
  - BibTeX
  - Link
  BibTeX
  @article{Helmig-Mitra-2019-01, author = {Mitra, Koondanibha and Köppl, Tobias and Duijn, Hans van and Pop, Iuliu Sorin and Helmig, Rainer}, issn = {0022-2526}, journal = {Studies in Applied Mathematics}, language = {English}, month = {07}, pages = {1906.08134}, publisher = {Wiley-Blackwell}, shorttitle = {Fronts in two-phase porous media flow problems}, title = {Fronts in two-phase porous media flow problems: the effects of hysteresis and dynamic capillarity}, url = {https://research.tue.nl/en/publications/fronts-in-two-phase-porous-media-flow-problems-the-effects-of-hys}, year = 2019 }
  Link
  https://research.tue.nl/en/publications/fronts-in-two-phase-porous-media-flow-problems-the-effects-of-hys
10. Beck, M., & Class, H. (2019). Modelling fault reactivation with characteristic stress-drop terms. Advances in Geosciences, 49, 1–7. https://doi.org/10.5194/adgeo-49-1-2019
  - BibTeX
  - Link
  BibTeX
  @article{Beck-2019-01, abstract = {Predicting shear failure that leads to the reactivation of faults during the injection of fluids in the subsurface is difficult since it inherently involves an enormous complexity of flow processes interacting with geomechanics. However, understanding and predicting induced seismicity is of great importance. Various approaches to modelling shear failure have been suggested recently. They are all dependent on the prediction of the pressure and stress field, which requires the solution of partial differential equations for flow and for geomechanics. Given a pressure and corresponding mechanical responses, shear slip can be detected using a failure criterion. We propose using characteristic values for stress drops occurring in a failure event as sinks in the geomechanical equation. This approach is discussed in this article and illustrated with an example.}, author = {Beck, Martin and Class, Holger}, booktitle = {Advances in {Geosciences}}, doi = {10.5194/adgeo-49-1-2019}, language = {English}, month = {07}, pages = {1--7}, publisher = {Copernicus GmbH}, title = {Modelling fault reactivation with characteristic stress-drop terms}, url = {https://www.adv-geosci.net/49/1/2019/}, volume = 49, year = 2019 }
  Link
  https://www.adv-geosci.net/49/1/2019/
11. Vidotto, Ettore., Koch, Timo., Köppl, Tobias., Helmig, Rainer., & Wohlmuth, Barbara. (2019). Hybrid Models for Simulating Blood Flow in Microvascular Networks. Multiscale Modeling & Simulation, 17, Article 3. https://doi.org/10.1137/18M1228712
  - BibTeX
  - Link
  BibTeX
  @article{Koch-Vidotto-2019-01, author = {Vidotto, Ettore. and Koch, Timo. and Köppl, Tobias. and Helmig, Rainer. and Wohlmuth, Barbara.}, doi = {10.1137/18M1228712}, issn = {1540-3459}, journal = {Multiscale Modeling \& Simulation}, month = {01}, number = 3, pages = {1076--1102}, title = {Hybrid {Models} for {Simulating} {Blood} {Flow} in {Microvascular} {Networks}}, url = {https://epubs.siam.org/doi/10.1137/18M1228712}, urldate = {2020-01-10}, volume = 17, year = 2019 }
  Link
  https://epubs.siam.org/doi/10.1137/18M1228712
12. Yang, G., Vaikuntanathan, V., Terzis, A., Cheng, X., Weigand, B., & Helmig, R. (2019). Impact of a linear array of hydrophilic and superhydrophobic spheres on a deep water pool. Colloids and Interfaces. https://doi.org/10.3390/colloids3010029
  - BibTeX
  BibTeX
  @article{NULL, author = {Yang, Guang and Vaikuntanathan, Visakh and Terzis, Alexandros and Cheng, Xin and Weigand, Bernhard and Helmig, Rainer}, doi = {10.3390/colloids3010029}, journal = {Colloids and Interfaces}, month = {01}, note = {, IWS2ID=4566 , Partnerinstitution: Institut für Thermodynamik der Luft- und Raumfahrt (ITLR), Shanghai Jiao Tong University , Partneraddress: }, title = {Impact of a linear array of hydrophilic and superhydrophobic spheres on a deep water pool}, year = 2019 }
13. Terzis, A., Zarikos, I., Weishaupt, K., Yang, G., Chu, X., Helmig, R., & Weigand, B. (2019). Microscopic velocity field measurements inside a regular porous medium adjacent to a low Reynolds number channel flow. Physics of Fluids, 31, Article 4. https://doi.org/10.1063/1.5092169
  - BibTeX
  - Link
  BibTeX
  @article{Weishaupt-Terzis-2019-01, author = {Terzis, A. and Zarikos, I. and Weishaupt, K. and Yang, G. and Chu, X. and Helmig, R. and Weigand, B.}, doi = {10.1063/1.5092169}, issn = {1070-6631}, journal = {Physics of Fluids}, month = {04}, number = 4, pages = 042001, publisher = {{AIP} Publishing}, title = {Microscopic velocity field measurements inside a regular porous medium adjacent to a low Reynolds number channel flow}, url = {https://aip.scitation.org/doi/full/10.1063/1.5092169}, urldate = {2020-01-10}, volume = 31, year = 2019 }
  Link
  https://aip.scitation.org/doi/full/10.1063/1.5092169
2018
1. Gao, B., Davarzani, H., Helmig, R., & Smits, K. M. (2018). Experimental and numerical study of evaporation from wavy surfaces by coupling free flow and porous media flow. Water Resources Research. https://doi.org/10.1029/2018WR023423
  - BibTeX
  BibTeX
  @article{NULL, author = {Gao, Bo and Davarzani, Hossein and Helmig, Rainer and Smits, Kathleen M.}, doi = {10.1029/2018WR023423}, journal = {Water Resources Research}, month = {11}, note = {, IWS2ID=4550 , Partnerinstitution: Colorado School of Mines, Bureau de Recherches Géologiques et Minières , Partneraddress: Golden, Colorado, USA, Orléans, Frankreich }, title = {Experimental and numerical study of evaporation from wavy surfaces by coupling free flow and porous media flow}, year = 2018 }
2. Schneider, M., Köppl, T., Helmig, R., Steinle, R., & Hilfer, R. (2018). Stable propagation of saturation overshoots for two-phase flow in porous media. Transport in Porous Media, 121, Article 3. https://doi.org/10.1007/s11242-017-0977-y
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Schneider, Martin and Köppl, Tobias and Helmig, Rainer and Steinle, Rouven and Hilfer, Rudolf}, doi = {10.1007/s11242-017-0977-y}, journal = {Transport in Porous Media}, month = {11}, note = {, IWS2ID=4489 , Partnerinstitution: Institut für Computerphysik }, number = 3, page = {621-641}, title = {Stable propagation of saturation overshoots for two-phase flow in porous media}, url = {https://doi.org/10.1007/s11242-017-0977-y}, volume = 121, year = 2018 }
  Link
  https://doi.org/10.1007/s11242-017-0977-y
3. Praditia, T., Helmig, R., & Hajibeygi, H. (2018). Multiscale formulation for coupled flow-heat equations arising from single-phase flow in fractured geothermal reservoirs. Computational Geosciences. https://doi.org/10.1007/s10596-018-9754-4
  - BibTeX
  BibTeX
  @article{NULL, author = {Praditia, Timothy and Helmig, Rainer and Hajibeygi, Hadi}, doi = {10.1007/s10596-018-9754-4}, journal = {Computational Geosciences}, month = {11}, note = {, IWS2ID=4491 , Partnerinstitution: Delft University of Technology }, title = {Multiscale formulation for coupled flow-heat equations arising from single-phase flow in fractured geothermal reservoirs}, year = 2018 }
4. Schneider, M., Gläser, D., Flemisch, B., & Helmig, R. (2018). Comparison of finite-volume schemes for diffusion problems. Oil & Gas Science and Technology – Revue d’IFP Energies Nouvelles, 73. https://ogst.ifpenergiesnouvelles.fr/articles/ogst/pdf/2018/01/ogst180050.pdf
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Schneider, Martin and Gläser, Dennis and Flemisch, Bernd and Helmig, Rainer}, journal = {Oil & Gas Science and Technology – Revue d'IFP Energies nouvelles}, month = {12}, note = {, IWS2ID=4565 , Partnerinstitution: IFP Energies nouvelles , Partneraddress: Rueil Malmaison }, title = {Comparison of finite-volume schemes for diffusion problems}, url = {https://ogst.ifpenergiesnouvelles.fr/articles/ogst/pdf/2018/01/ogst180050.pdf}, volume = 73, year = 2018 }
  Link
  https://ogst.ifpenergiesnouvelles.fr/articles/ogst/pdf/2018/01/ogst180050.pdf
5. Vidotto, E., Helmig, R., Schneider, M., & Wohlmuth, B. (2018). Streamline method for resolving sharp fronts for complex two-phase flow in porous media. Computational Geosciences, 22, Article 6. https://doi.org/10.1007/s10596-018-9767-z
  - BibTeX
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  BibTeX
  @article{Vidotto2018, abstract = {In this paper, we present a fast streamline-based numerical method for the two-phase flow equations in high-rate flooding scenarios for incompressible fluids in heterogeneous and anisotropic porous media. A fractional flow formulation is adopted and a discontinuous Galerkin method (DG) is employed to solve the pressure equation. Capillary effects can be neglected in high-rate flooding scenarios. This allows us to present an improved streamline approach in combination with the one-dimensional front tracking method to solve the transport equation. To handle the high computational costs of the DG approximation, domain decomposition is applied combined with an algebraic multigrid preconditioner to solve the linear system. Special care at the interior interfaces is required and the streamline tracer has to include a dynamic communication strategy. The method is validated in various two- and three-dimensional tests, where comparisons of the solutions in terms of approximation of flow front propagation with standard fully implicit finite-volume methods are provided.}, author = {Vidotto, Ettore and Helmig, Rainer and Schneider, Martin and Wohlmuth, Barbara}, day = 01, doi = {10.1007/s10596-018-9767-z}, issn = {1573-1499}, journal = {Computational Geosciences}, month = {12}, number = 6, pages = {1487--1502}, title = {Streamline method for resolving sharp fronts for complex two-phase flow in porous media}, url = {https://doi.org/10.1007/s10596-018-9767-z}, volume = 22, year = 2018 }
  Link
  https://doi.org/10.1007/s10596-018-9767-z
6. Schneider, M., Flemisch, B., Helmig, R., Terekhov, K., & Tchelepi, H. (2018). Monotone nonlinear finite-volume method for challenging grids. Computational Geosciences. https://doi.org/10.1007/s10596-017-9710-8
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Schneider, Martin and Flemisch, Bernd and Helmig, Rainer and Terekhov, Kirill and Tchelepi, Hamdi}, doi = {10.1007/s10596-017-9710-8}, journal = {Computational Geosciences}, month = {01}, note = {, IWS2ID=4426 , Partneraddress: Stanford, California, USA }, title = {Monotone nonlinear finite-volume method for challenging grids}, url = {https://doi.org/10.1007/s10596-017-9710-8}, year = 2018 }
  Link
  https://doi.org/10.1007/s10596-017-9710-8
7. Mohammadi, F., Kopmann, R., Guthke, A., Oladyshkin, S., & Nowak, W. (2018). Bayesian selection of hydro-morphodynamic models under computational time constraints. Advances in Water Resources, 117, 53–64. https://doi.org/10.1016/j.advwatres.2018.05.007
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  BibTeX
  @article{Mohammadi2018, abstract = {A variety of empirical formulas to predict river bed evolution with hydro-morphodynamic river models exists. Modelers lack objective guidance of how to select the most appropriate one for a specific application. Such guidance can be provided by Bayesian model selection (BMS). Its applicability is however limited by high computational costs. To transfer it to computationally expensive river modeling tasks, we propose to combine BMS with model reduction based on arbitrary Polynomial Chaos Expansion. To account for approximation errors in the reduced models, we introduce a novel correction factor that yields a reliable model ranking even under strong computational time constraints. We demonstrate our proposed approach on a case study for a 10-km stretch of the lower Rhine river. The correction factor may shield us from misleading model ranking results. In our case, the correction factor was shown to increase the confidence in model selection.}, author = {Mohammadi, Farid and Kopmann, Rebekka and Guthke, Anneli and Oladyshkin, Sergey and Nowak, Wolfgang}, doi = {10.1016/j.advwatres.2018.05.007}, issn = {0309-1708}, journal = {Advances in Water Resources}, month = {07}, pages = {53-64}, publisher = {Elsevier {BV}}, title = {Bayesian selection of hydro-morphodynamic models under computational time constraints}, url = {http://www.sciencedirect.com/science/article/pii/S0309170817311909}, volume = 117, year = 2018 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0309170817311909
8. Köppl, T., Fedoseyev, M., & Helmig, R. (2018). Simulation of surge reduction systems using dimensionally reduced models. Journal of Hydraulic Engineering. https://doi.org/10.1061/(ASCE)HY.1943-7900.0001553
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Köppl, Tobias and Fedoseyev, Mikhail and Helmig, Rainer}, doi = {10.1061/(ASCE)HY.1943-7900.0001553}, journal = {Journal of Hydraulic Engineering}, month = {12}, note = {, IWS2ID=4466 , Partnerinstitution: Gubkin Russian State University of Oil and Gas , Partneraddress: Moscow, Russia }, title = {Simulation of surge reduction systems using dimensionally reduced models}, url = {https://ascelibrary.org/doi/10.1061/%28ASCE%29HY.1943-7900.0001553}, year = 2018 }
  Link
  https://ascelibrary.org/doi/10.1061/%28ASCE%29HY.1943-7900.0001553
9. Becker, B., Guo, B., Bandilla, K., Celia, M. A., Flemisch, B., & Helmig, R. (2018). An adaptive multiphysics model coupling vertical equilibrium and full multidimensions for multiphase flow in porous media. Water Resources Research, 54. https://doi.org/10.1029/2017WR022303
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Becker, Beatrix and Guo, Bo and Bandilla, Karl and Celia, Michael A. and Flemisch, Bernd and Helmig, Rainer}, doi = {10.1029/2017WR022303}, journal = {Water Resources Research}, month = {05}, note = {, IWS2ID=4512 , Partnerinstitution: Stanford University, Dept. of Energy Resources Engineering, Princeton University, Dept. of Civil and Environmental Engineering }, page = {4347-4360}, title = {An adaptive multiphysics model coupling vertical equilibrium and full multidimensions for multiphase flow in porous media}, url = {https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2017WR022303}, volume = 54, year = 2018 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2017WR022303
10. Köppl, T., Vidotto, E., Wohlmuth, B. I., & Zunino, P. (2018). Mathematical modeling, analysis and numerical approximation of second order elliptic problems with inclusions. Mathematical Models and Methods in Applied Sciences, 28, Article 5. https://doi.org/10.1142/S0218202518500252
  - BibTeX
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  BibTeX
  @article{NULL, author = {Köppl, Tobias and Vidotto, Ettore and Wohlmuth, Barbara I. and Zunino, Paolo}, doi = {10.1142/S0218202518500252}, journal = {Mathematical Models and Methods in Applied Sciences}, month = {05}, note = {, IWS2ID=4463 , Partnerinstitution: MOX, Department of Mathematics, Politecnico di Milano, Lehrstuhl fuer Numerische Mathematik, TUM }, number = 5, page = {953-979}, title = {Mathematical modeling, analysis and numerical approximation of second order elliptic problems with inclusions}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2017/Becker_et_al-2017-Water_Resources_Research.pdf}, volume = 28, year = 2018 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2017/Becker_et_al-2017-Water_Resources_Research.pdf
11. Koch, T., Gläser, D., Weishaupt, K., Ackermann, S., Beck, M., Becker, B., Burbulla, S., Class, H., Coltman, E., Fetzer, T., Flemisch, B., Grüninger, C., Heck, K., Hommel, J., Kurz, T., Lipp, M., Mohammadi, F., Schneider, M., Seitz, G., et al. (2018). DuMuX 3.0.0. https://doi.org/10.5281/zenodo.2479595
  - BibTeX
  BibTeX
  @article{koch2018dumux, author = {Koch, Timo and Gläser, Dennis and Weishaupt, Kilian and Ackermann, Sina and Beck, Martin and Becker, Beatrix and Burbulla, S. and Class, Holger and Coltman, Edward and Fetzer, Thomas and Flemisch, Bernd and Grüninger, Christoph and Heck, Katharina and Hommel, Johannes and Kurz, Theresa and Lipp, Melanie and Mohammadi, Farid and Schneider, Martin and Seitz, Gabriele and Scholz, Simon and Weinhardt, Felix}, doi = {10.5281/zenodo.2479595}, title = {DuMuX 3.0.0}, year = 2018 }
12. Köppl, T., Santin, G., Haasdonk, B., & Helmig, R. (2018). Numerical modelling of a peripheral arterial stenosis using dimensionally reduced models and machine learning techniques. International Journal for Numerical Methods in Biomedical Engineering. https://doi.org/10.1002/cnm.3095
  - BibTeX
  BibTeX
  @article{NULL, author = {Köppl, Tobias and Santin, Gabriele and Haasdonk, Bernard and Helmig, Rainer}, doi = {10.1002/cnm.3095}, journal = {International Journal for Numerical Methods in Biomedical Engineering}, month = {12}, note = {, IWS2ID=4481 , Partnerinstitution: Institut für Angewandte Analysis und Numerische Simulation }, title = {Numerical modelling of a peripheral arterial stenosis using dimensionally reduced models and machine learning techniques}, year = 2018 }
13. Koch, T., Heck, K., Schröder, N., Class, H., & Helmig, R. (2018). A new simulation framework for soil-root interaction, evaporation, root growth, and solute transport. Vadose Zone Journal. https://doi.org/10.2136/vzj2017.12.0210
  - BibTeX
  BibTeX
  @article{NULL, author = {Koch, Timo and Heck, Katharina and Schröder, Natalie and Class, Holger and Helmig, Rainer}, doi = {10.2136/vzj2017.12.0210}, journal = {Vadose Zone Journal}, month = {08}, note = {, IWS2ID=4546 }, title = {A new simulation framework for soil-root interaction, evaporation, root growth, and solute transport}, year = 2018 }
14. Hommel, J., Coltman, E., & Class, H. (2018). Porosity-Permeability Relations for Evolving Pore Space: A Review with a Focus on (Bio-)geochemically Altered Porous Media. Transport in Porous Media, 2, Article 124. https://doi.org/10.1007/s11242-018-1086-2
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Hommel, Johannes and Coltman, Edward and Class, Holger}, doi = {10.1007/s11242-018-1086-2}, journal = {Transport in Porous Media}, month = {05}, note = {, IWS2ID=4501 }, number = 124, page = {589-629}, title = {Porosity-Permeability Relations for Evolving Pore Space: A Review with a Focus on (Bio-)geochemically Altered Porous Media}, url = {https://link.springer.com/article/10.1007%2Fs11242-018-1086-2}, volume = 2, year = 2018 }
  Link
  https://link.springer.com/article/10.1007%2Fs11242-018-1086-2
2017
1. Gläser, D., Helmig, R., Flemisch, B., & Class, H. (2017). A discrete fracture model for two-phase flow in fractured porous media. Advances in Water Resources, 110. https://doi.org/10.1016/j.advwatres.2017.10.031
  - BibTeX
  BibTeX
  @article{NULL, author = {Gläser, Dennis and Helmig, Rainer and Flemisch, Bernd and Class, Holger}, doi = {10.1016/j.advwatres.2017.10.031}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=4485 }, page = {335-348}, title = {A discrete fracture model for two-phase flow in fractured porous media}, volume = 110, year = 2017 }
2. Terzis, A., Roumeli, E., Weishaupt, K., Brack, S., Aslannejad, H., Groß, J., Hassanizadeh, S. M., Helmig, R., & Weigand, B. (2017). Heat release at the wetting front during capillary filling of cellulosic micro-substrates. Journal of Colloid and Interface Science. https://doi.org/10.1016/j.jcis.2017.06.027
  - BibTeX
  BibTeX
  @article{NULL, author = {Terzis, Alexandros and Roumeli, Eleftheria and Weishaupt, Kilian and Brack, Stefan and Aslannejad, Hamed and Groß, Joachim and Hassanizadeh, S. Majid and Helmig, Rainer and Weigand, Bernhard}, doi = {10.1016/j.jcis.2017.06.027}, journal = {Journal of Colloid and Interface Science}, month = {05}, note = {, IWS2ID=4458 }, title = {Heat release at the wetting front during capillary filling of cellulosic micro-substrates}, year = 2017 }
3. Kleinknecht, S., Class, H., & Braun, J. (2017). Experimental study on retardation of a heavy NAPL vapor in partially saturated porous media. Hydrol. Earth Syst. Sci. Discuss., 21.
  - BibTeX
  BibTeX
  @article{kleinknecht2017experimental, author = {Kleinknecht, Simon and Class, Holger and Braun, Jürgen}, journal = {Hydrol. Earth Syst. Sci. Discuss. }, month = {03}, note = {, IWSID=3459 }, page = {1381-1396}, title = {Experimental study on retardation of a heavy NAPL vapor in partially saturated porous media}, volume = 21, year = 2017 }
4. Jabbari, M., Shojaee Nasirabadi, P., Jambhekar, V. A., Hattel, J. H., & Helmig, R. (2017). Drying of a tape-cast layer: Numerical investigation of influencing parameters. International Journal of Heat and Mass Transfer, 108. https://doi.org/10.1016/j.ijheatmasstransfer.2017.01.074
  - BibTeX
  BibTeX
  @article{NULL, author = {Jabbari, Mirmasoud and Shojaee Nasirabadi, Parizad and Jambhekar, Vishal Arun and Hattel, Jesper Henri and Helmig, Rainer}, doi = {10.1016/j.ijheatmasstransfer.2017.01.074}, journal = {International Journal of Heat and Mass Transfer}, month = {10}, note = {, IWS2ID=4394 , Partnerinstitution: Warwick Manufacturing Group, University of Warwick and Dept. of Mechanical Engineering, TU Denmark }, page = {2229-2238}, title = {Drying of a tape-cast layer: Numerical investigation of influencing parameters}, volume = 108, year = 2017 }
5. Sander, O., Koch, T., Schröder, N., & Flemisch, B. (2017). The Dune FoamGrid implementation for surface and network grids. Archive of Numerical Software, 5. https://dx.doi.org/10.11588/ans.2017.1.28490
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Sander, Oliver and Koch, Timo and Schröder, Natalie and Flemisch, Bernd}, journal = {Archive of Numerical Software}, month = {03}, note = {, IWS2ID=4444 }, page = {217-244}, title = {The Dune FoamGrid implementation for surface and network grids}, url = {https://dx.doi.org/10.11588/ans.2017.1.28490}, volume = 5, year = 2017 }
  Link
  https://dx.doi.org/10.11588/ans.2017.1.28490
6. Gupta, S., Deusner, C., Haeckel, M., Helmig, R., & Wohlmuth, B. I. (2017). Testing a thermo-chemo-hydro-geomechanical model for gas hydrate bearing sediments using triaxial compression lab experiments. https://doi.org/10.1002/2017GC006901
  - BibTeX
  BibTeX
  @article{NULL, author = {Gupta, Shubhangi and Deusner, Christian and Haeckel, Matthias and Helmig, Rainer and Wohlmuth, Barbara I.}, doi = {10.1002/2017GC006901}, month = {07}, note = {, IWS2ID=4474 , Partnerinstitution: Helmholtz-Zentrum für Ozeanforschung, Kiel, Lehrstuhl für Numerische Mathematik, TU München }, title = {Testing a thermo-chemo-hydro-geomechanical model for gas hydrate bearing sediments using triaxial compression lab experiments}, year = 2017 }
7. Becker, B., Guo, B., Bandilla, K., Celia, M. A., Flemisch, B., & Helmig, R. (2017). A pseudo-vertical equilibrium model for slow gravity drainage dynamics. Water Resources Research, 53. https://doi.org/10.1002/2017WR021644
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Becker, Beatrix and Guo, Bo and Bandilla, Karl and Celia, Michael A. and Flemisch, Bernd and Helmig, Rainer}, doi = {10.1002/2017WR021644}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=4502 , Partnerinstitution: Stanford University, Dept. of Energy Resources Engineering, Princeton University, Dept. of Civil and Environmental Engineering , Partneraddress: Stanford, California, USA, Princeton, NJ, USA }, page = {10,491-10,507}, title = {A pseudo-vertical equilibrium model for slow gravity drainage dynamics}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2017/Becker_et_al-2017-Water_Resources_Research.pdf}, volume = 53, year = 2017 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2017/Becker_et_al-2017-Water_Resources_Research.pdf
8. Yang, G., Weigand, B., Terzis, A., Weishaupt, K., & Helmig, R. (2017). Numerical simulation of turbulent flow and heat transfer in a three-dimensional channel coupled with flow through porous structures. Transport in Porous Media, 120. https://doi.org/10.1007/s11242-017-0995-9
  - BibTeX
  BibTeX
  @article{NULL, author = {Yang, Guang and Weigand, Bernhard and Terzis, Alexandros and Weishaupt, Kilian and Helmig, Rainer}, doi = {10.1007/s11242-017-0995-9}, journal = {Transport in Porous Media}, month = {08}, note = {, IWS2ID=4472 , Partnerinstitution: Institut für Thermodynamik der Luft- und Raumfahrt (ITLR) , Partneraddress: Stuttgart }, page = {01--23}, title = {Numerical simulation of turbulent flow and heat transfer in a three-dimensional channel coupled with flow through porous structures}, volume = 120, year = 2017 }
9. Schneider, M., Agélas, L., Enchery, G., & Flemisch, B. (2017). Convergence of nonlinear finite volume schemes for heterogeneous anisotropic diffusion on general meshes. 351. https://doi.org/10.1016/j.jcp.2017.09.003
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Schneider, Martin and Agélas, Léo and Enchery, Guillaume and Flemisch, Bernd}, doi = {10.1016/j.jcp.2017.09.003}, month = {09}, note = {, IWS2ID=4462 }, page = {80-107}, title = {Convergence of nonlinear finite volume schemes for heterogeneous anisotropic diffusion on general meshes}, url = {https://authors.elsevier.com/a/1VoIE508Haegg}, volume = 351, year = 2017 }
  Link
  https://authors.elsevier.com/a/1VoIE508Haegg
10. Mejri, E., Bouhlila, R., & Helmig, R. (2017). Heterogeneity effects on evaporation-induced halite and gypsum co-precipitation in porous media. Transport in Porous Media. https://doi.org/10.1007/s111242-017-0846-8
  - BibTeX
  BibTeX
  @article{NULL, author = {Mejri, Emna and Bouhlila, Rachida and Helmig, Rainer}, doi = {10.1007/s111242-017-0846-8}, journal = {Transport in Porous Media}, month = {03}, note = {, IWS2ID=4427 }, title = {Heterogeneity effects on evaporation-induced halite and gypsum co-precipitation in porous media}, year = 2017 }
11. Neuweiler, I., & Helmig, R. (2017). Debates - Hypothesis testing in hydrology: a subsurface perspective. Water Resources Research, 53. https://doi.org/1002/2016WR020047
  - BibTeX
  BibTeX
  @article{NULL, author = {Neuweiler, Insa and Helmig, Rainer}, doi = {1002/2016WR020047}, journal = {Water Resources Research}, month = {03}, note = {, IWS2ID=4473 , Partnerinstitution: Institut für Strömungsmechanik und Umweltphysik im Bauwesen, Universität Hannover , Partneraddress: Hannover }, page = {1784-1791}, title = {Debates - Hypothesis testing in hydrology: a subsurface perspective}, volume = 53, year = 2017 }
12. Trautz, A., Illangasekare, T., Rodriguez-Iturbe, I., Heck, K., & Helmig, R. (2017). Development of an experimental approach to study coupled soil-plant-atmosphere processes using plant analogs. Water Resources Research, 53.
  - BibTeX
  BibTeX
  @article{NULL, author = {Trautz, Andrew and Illangasekare, Tissa and Rodriguez-Iturbe, Ignacio and Heck, Katharina and Helmig, Rainer}, journal = {Water Resources Research}, month = {04}, note = {, IWS2ID=4464 , Partneraddress: Golden, Colorado, USA }, page = {3319-3340}, title = {Development of an experimental approach to study coupled soil-plant-atmosphere processes using plant analogs}, volume = 53, year = 2017 }
13. Fetzer, T., Vanderborght, J., Mosthaf, K., Smits, K. M., & Helmig, R. (2017). Heat and water transport in soils and across the soil-atmosphere interface: 2. Numerical analysis. Water Resources Research, 53, Article 2. https://doi.org/10.1002/2016WR019983
  - BibTeX
  BibTeX
  @article{NULL, author = {Fetzer, Thomas and Vanderborght, Jan and Mosthaf, Klaus and Smits, Kathleen M. and Helmig, Rainer}, doi = {10.1002/2016WR019983}, journal = {Water Resources Research}, month = {10}, note = {, IWS2ID=4403 , Partnerinstitution: Forschungszentrum Jülich (FZJ), TU Denmark, Colorado School of Mines }, number = 2, page = {1080-1100}, title = {Heat and water transport in soils and across the soil-atmosphere interface: 2. Numerical analysis}, volume = 53, year = 2017 }
14. Vanderborght, J., Fetzer, T., Mosthaf, K., Smits, K. M., & Helmig, R. (2017). Heat and water transport in soils and across the soil-atmosphere interface: 1. Theory and different model concepts. Water Resources Research, 53, Article 2. https://doi.org/10.1002/2016WR019982
  - BibTeX
  BibTeX
  @article{NULL, author = {Vanderborght, Jan and Fetzer, Thomas and Mosthaf, Klaus and Smits, Kathleen M. and Helmig, Rainer}, doi = {10.1002/2016WR019982}, journal = {Water Resources Research}, month = {10}, note = {, IWS2ID=4402 , Partnerinstitution: Forschungszentrum Jülich (FZJ), TU Denmark, Colorado School of Mines }, number = 2, page = {1057-1079}, title = {Heat and water transport in soils and across the soil-atmosphere interface: 1. Theory and different model concepts}, volume = 53, year = 2017 }
15. Kempf, D., & Koch, T. (2017). System testing in scientific numerical software frameworks using the example of DUNE. Archive of Numerical Software, 5. https://dx.doi.org/10.11588/ans.2017.1.27447
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  - Link
  BibTeX
  @article{NULL, author = {Kempf, Dominic and Koch, Timo}, journal = {Archive of Numerical Software}, month = {03}, note = {, IWS2ID=4443 }, page = {151-168}, title = {System testing in scientific numerical software frameworks using the example of DUNE}, url = {https://dx.doi.org/10.11588/ans.2017.1.27447}, volume = 5, year = 2017 }
  Link
  https://dx.doi.org/10.11588/ans.2017.1.27447
16. Schneider, M., Flemisch, B., & Helmig, R. (2017). Monotone nonlinear finite-volume method for nonisothermal two-phase two-component flow in porous media. International Journal for Numerical Methods in Fluids, 84, Article 6. https://doi.org/10.1002/fld.4352
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Schneider, Martin and Flemisch, Bernd and Helmig, Rainer}, doi = {10.1002/fld.4352}, journal = {International Journal for Numerical Methods in Fluids}, month = {01}, note = {, IWS2ID=4354 }, number = 6, page = {352-381}, title = {Monotone nonlinear finite-volume method for nonisothermal two-phase two-component flow in porous media}, url = {https://onlinelibrary.wiley.com/doi/10.1002/fld.4352/full}, volume = 84, year = 2017 }
  Link
  https://onlinelibrary.wiley.com/doi/10.1002/fld.4352/full
2016
1. Fattahi, E., Waluga, C., Wohlmuth, B. I., Rüde, U., Manhard, M., & Helmig, R. (2016). Lattice Boltzmann methods in porous media simulations: laminar to turbulent flow. Computers and Fluids, 140.
  - BibTeX
  BibTeX
  @article{NULL, author = {Fattahi, Ehsan and Waluga, Christian and Wohlmuth, Barbara I. and Rüde, Ulrich and Manhard, Michael and Helmig, Rainer}, journal = {Computers and fluids}, month = {11}, note = {, IWS2ID=4405 }, page = {247-259}, title = {Lattice Boltzmann methods in porous media simulations: laminar to turbulent flow}, volume = 140, year = 2016 }
2. Hommel, J., Ebigbo, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2016). Finding a balance between accuracy and effort for modeling biomineralization. Energy Procedia, 97. https://doi.org/10.1016/j.egypro.2016.10.028
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Hommel, Johannes and Ebigbo, Anozie and Gerlach, Robin and Cunningham, Alfred B. and Helmig, Rainer and Class, Holger}, doi = {10.1016/j.egypro.2016.10.028}, journal = {Energy Procedia}, month = {11}, note = {, IWS2ID=4408 , Partnerinstitution: Montana State University }, page = {379-386}, title = {Finding a balance between accuracy and effort for modeling biomineralization}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2016/Hommel_EgyPro_2016.pdf}, volume = 97, year = 2016 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2016/Hommel_EgyPro_2016.pdf
3. Gupta, S., Wohlmuth, B. I., & Helmig, R. (2016). Multi-rate time stepping schemes for hydro-geomechanical model for subsurface methane hydrate reservoirs. Advances in Water Resources, 91. https://doi.org/10.1016/j.advwatres.2016.02.013
  - BibTeX
  BibTeX
  @article{NULL, author = {Gupta, Shubhangi and Wohlmuth, Barbara I. and Helmig, Rainer}, doi = {10.1016/j.advwatres.2016.02.013}, journal = {Advances in Water Resources}, month = {05}, note = {, IWS2ID=4370 , Partnerinstitution: Lehrstuhl für Numerische Mathematik , Partneraddress: TU München }, page = {78-87}, title = {Multi-rate time stepping schemes for hydro-geomechanical model for subsurface methane hydrate reservoirs}, volume = 91, year = 2016 }
4. Lindner, F., Nuske, P., Weishaupt, K., Helmig, R., Mundt, C., & Pfitzner, M. (2016). Transpiration cooling with local thermal nonequilibrium: Model comparison in multiphase flow in porous media. Journal of Porous Media, 19. https://doi.org/10.1615/JPorMedia.v19.i2.30
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Lindner, Franz and Nuske, Philipp and Weishaupt, Kilian and Helmig, Rainer and Mundt, Christian and Pfitzner, Michael}, doi = {10.1615/JPorMedia.v19.i2.30}, journal = {Journal of Porous Media}, month = {01}, note = {, IWS2ID=4373 }, page = {131-153}, title = {Transpiration cooling with local thermal nonequilibrium: Model comparison in multiphase flow in porous media}, url = {https://www.dl.begellhouse.com/journals/49dcde6d4c0809db,756c5cb610533dc8,29b3011f079da782.html}, volume = 19, year = 2016 }
  Link
  https://www.dl.begellhouse.com/journals/49dcde6d4c0809db,756c5cb610533dc8,29b3011f079da782.html
5. Jambhekar, V. A., Mejri, E., Schröder, N., Helmig, R., & Shokri, N. (2016). Kinetic Approach to Model Reactive Transport and Mixed Salt Precipitation in a Coupled Free-Flow–Porous-Media System. Transport in Porous Media. https://doi.org/10.1007/s11242-016-0665-3
  - BibTeX
  BibTeX
  @article{NULL, author = {Jambhekar, Vishal Arun and Mejri, Emna and Schröder, Natalie and Helmig, Rainer and Shokri, Nima}, doi = {10.1007/s11242-016-0665-3}, journal = {Transport in Porous Media}, month = {03}, note = {, IWS2ID=4347 }, title = {Kinetic Approach to Model Reactive Transport and Mixed Salt Precipitation in a Coupled Free-Flow–Porous-Media System}, year = 2016 }
6. Gläser, D., Dell’Oca, A., Tatomir, A., Bensabat, J., Class, H., Guadagnini, A., Helmig, R., McDermott, C., Riva, M., & Sauter, M. (2016). An Approach Towards a FEP-based Model for Risk Assessment for Hydraulic Fracturing Operations. Energy Procedia, 97, 387–394. https://doi.org/10.1016/j.egypro.2016.10.030
  - BibTeX
  - Link
  BibTeX
  @article{Glaeser-Glaeser-2016-01, author = {Gläser, D. and Dell’Oca, A. and Tatomir, A. and Bensabat, J. and Class, H. and Guadagnini, A. and Helmig, R. and McDermott, C. and Riva, M. and Sauter, M.}, doi = {10.1016/j.egypro.2016.10.030}, issn = {1876-6102}, journal = {Energy Procedia}, language = {en}, month = {11}, note = {European Geosciences Union General Assembly 2016, EGU Division Energy, Resources \& the Environment (ERE)}, pages = {387--394}, series = {European {Geosciences} {Union} {General} {Assembly} 2016, {EGU} {Division} {Energy}, {Resources} \& the {Environment} ({ERE})}, title = {An {Approach} {Towards} a {FEP}-based {Model} for {Risk} {Assessment} for {Hydraulic} {Fracturing} {Operations}}, url = {http://www.sciencedirect.com/science/article/pii/S187661021630978X}, urldate = {2020-01-14}, volume = 97, year = 2016 }
  Link
  http://www.sciencedirect.com/science/article/pii/S187661021630978X
7. Baber, K., Flemisch, B., & Helmig, R. (2016). Modelling drop dynamics at the interface between free and porous-medium flow using the mortar method. International Journal of Heat and Mass Transfer. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2014/SimTech_Preprint_Baber2014.pdf
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Baber, Katherina and Flemisch, Bernd and Helmig, Rainer}, journal = {International Journal of Heat and Mass Transfer}, month = {07}, note = {to appear, IWS2ID=2989 }, title = {Modelling drop dynamics at the interface between free and porous-medium flow using the mortar method}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2014/SimTech_Preprint_Baber2014.pdf}, year = 2016 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2014/SimTech_Preprint_Baber2014.pdf
8. Schmid, K. S., Alyafei, N., Geiger, S., & Blunt, M. (2016). Analytical Solutions for Spontaneous Imbibition: Fractional-Flow Theory and Experimental Analysis. SPE Journal. https://doi.org/10.2118/184393-PA
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Schmid, Karen Sophie and Alyafei, Nayef and Geiger, Sebastian and Blunt, Martin}, doi = {10.2118/184393-PA}, journal = {SPE Journal}, month = {08}, note = {, IWS2ID=2966 }, title = {Analytical Solutions for Spontaneous Imbibition: Fractional-Flow Theory and Experimental Analysis}, url = {https://www.onepetro.org/journal-paper/SPE-184393-PA}, year = 2016 }
  Link
  https://www.onepetro.org/journal-paper/SPE-184393-PA
9. Hommel, J., Lauchnor, E., Gerlach, R., Cunningham, A. B., Ebigbo, A., Helmig, R., & Class, H. (2016). Investigating the influence of the initial biomass distribution and injection strategies on biofilm-mediated calcite precipitation in porous media. Transport in Porous Media, 114, Article 2. https://doi.org/10.1007/s11242-015-0617-3
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Hommel, Johannes and Lauchnor, Ellen and Gerlach, Robin and Cunningham, Alfred B. and Ebigbo, Anozie and Helmig, Rainer and Class, Holger}, doi = {10.1007/s11242-015-0617-3}, journal = {Transport in Porous Media}, month = {12}, note = {, IWS2ID=3133 , Partnerinstitution: Montana State University , Partneraddress: Bozeman, Montana, USA }, number = 2, page = {557-579}, title = {Investigating the influence of the initial biomass distribution and injection strategies on biofilm-mediated calcite precipitation in porous media}, url = {http://rdcu.be/jUty}, volume = 114, year = 2016 }
  Link
  http://rdcu.be/jUty
10. Drzisga, D., Köppl, T., Pohl, U., Helmig, R., & Wohlmuth, B. I. (2016). Numerical modeling of compensation mechanisms for peripheral arterial stenoses. Computers in Biology and Medicine, Article 70.
  - BibTeX
  BibTeX
  @article{NULL, author = {Drzisga, Daniel and Köppl, Tobias and Pohl, Ulrich and Helmig, Rainer and Wohlmuth, Barbara I.}, journal = {Computers in Biology and Medicine}, month = {05}, note = {, IWS2ID=4336 , Partnerinstitution: Lehrstuhl für Numerische Mathematik , Partneraddress: TU München }, number = 70, page = {190-201}, title = {Numerical modeling of compensation mechanisms for peripheral arterial stenoses}, year = 2016 }
11. Weishaupt, K., Bordenave, A., Atteia, O., & Class, H. (2016). Numerical Investigation on the Benefits of Preheating for an Increased Thermal Radius of Influence During Steam Injection in Saturated Soil. Transport in Porous Media. https://doi.org/10.1007/s11242-016-0624-z
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Weishaupt, Kilian and Bordenave, Alexandre and Atteia, Olivier and Class, Holger}, doi = {10.1007/s11242-016-0624-z}, journal = {Transport in Porous Media}, month = {01}, note = {, IWS2ID=4343 }, title = {Numerical Investigation on the Benefits of Preheating for an Increased Thermal Radius of Influence During Steam Injection in Saturated Soil}, url = {http://link.springer.com/article/10.1007/s11242-016-0624-z}, year = 2016 }
  Link
  http://link.springer.com/article/10.1007/s11242-016-0624-z
12. Kissinger, A., Noack, V., Knopf, S., Konrad, W., Scheer, D., & Class, H. (2016). Regional-scale brine migration along vertical pathways due to CO2 injection - Part 2: a simulated case study in the North German Basin. Hydrology and Earth System Sciences (HESS).
  - BibTeX
  BibTeX
  @article{kissinger2016, author = {Kissinger, Alexander and Noack, Vera and Knopf, Stefan and Konrad, Wilfried and Scheer, Dirk and Class, Holger}, journal = {Hydrology and Earth System Sciences (HESS)}, month = {12}, note = {, IWS2ID=4412 , Partnerinstitution: Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Dialogik }, title = {Regional-scale brine migration along vertical pathways due to CO2 injection - Part 2: a simulated case study in the North German Basin}, year = 2016 }
13. Fetzer, T., Smits, K. M., & Helmig, R. (2016). Effect of Turbulence and Roughness on Coupled Porous-Medium/Free-Flow Exchange Processes. Transport in Porous Media, 114, Article 2. https://doi.org/10.1007/s11242-016-0654-6
  - BibTeX
  BibTeX
  @article{NULL, author = {Fetzer, Thomas and Smits, Kathleen M. and Helmig, Rainer}, doi = {10.1007/s11242-016-0654-6}, journal = {Transport in Porous Media}, month = {04}, note = {, IWS2ID=3053 }, number = 2, page = {395-424}, title = {Effect of Turbulence and Roughness on Coupled Porous-Medium/Free-Flow Exchange Processes}, volume = 114, year = 2016 }
14. Scheer, D., Konrad, W., Class, H., Kissinger, A., Knopf, S., & Noack, V. (2016). Regional-scale brine migration along vertical pathways due to CO2 injection - Part 1: the participatory modeling approach. Hydrology and Earth System Sciences (HESS).
  - BibTeX
  BibTeX
  @article{Scheer2017, author = {Scheer, Dirk and Konrad, Wilfried and Class, Holger and Kissinger, Alexander and Knopf, Stefan and Noack, Vera}, journal = {Hydrology and Earth System Sciences (HESS)}, month = {12}, note = {, IWS2ID=4413 , Partnerinstitution: Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Dialogik }, title = {Regional-scale brine migration along vertical pathways due to CO2 injection - Part 1: the participatory modeling approach}, year = 2016 }
15. Jabbari, M., Jambhekar, V. A., Hattel, J. H., & Helmig, R. (2016). Drying of a tape-cast layer: Numerical modelling of the evaporation process in a graded/layered material. International Journal of Heat and Mass Transfer, 103. https://doi.org/10.1016/j.ijheatmasstransfer.2016.08.073
  - BibTeX
  BibTeX
  @article{NULL, author = {Jabbari, Mirmasoud and Jambhekar, Vishal Arun and Hattel, Jesper Henri and Helmig, Rainer}, doi = {10.1016/j.ijheatmasstransfer.2016.08.073}, journal = {International Journal of Heat and Mass Transfer}, month = {12}, note = {, IWS2ID=4392 , Partnerinstitution: Warwick Manufacturing Group, University of Warwick and Dept. of Mechanical Engineering, TU Denmark , Partneraddress: Coventry, UK and Lyngby, Denmark }, page = {1144-1154}, title = {Drying of a tape-cast layer: Numerical modelling of the evaporation process in a graded/layered material}, volume = 103, year = 2016 }
16. Helmig, R., Hassanizadeh, S. M., & Dahle, H. K. (2016). Foreword. NUPUS: Porous media research has got a brand name. Transport in Porous Media, 114. https://doi.org/10.1007/s11242-016-0736-5
  - BibTeX
  BibTeX
  @article{NULL, author = {Helmig, Rainer and Hassanizadeh, S. Majid and Dahle, Helge K.}, doi = {10.1007/s11242-016-0736-5}, journal = {Transport in Porous Media}, month = {07}, note = {, IWS2ID=4390 }, page = {235-236}, title = {Foreword. NUPUS: Porous media research has got a brand name}, volume = 114, year = 2016 }
17. Szymanska, P., Tisler, W., Schütz, C., Szymkiewicz, A., Neuweiler, I., & Helmig, R. (2016). Experimental and numerical analysis of air trapping in a porous medium with coarse textured inclusions. Acta Geophysica, 64.
  - BibTeX
  BibTeX
  @article{NULL, author = {Szymanska, Paulina and Tisler, Witold and Schütz, Cindi and Szymkiewicz, Adam and Neuweiler, Insa and Helmig, Rainer}, journal = {Acta Geophysica}, month = {12}, note = {, IWS2ID=4417 , Partnerinstitution: Gdansk University of Technology und Institut für Strömungsmechanik und Umweltphysik im Bauwesen,Leibniz Universität Hannover }, page = {2487-2509}, title = {Experimental and numerical analysis of air trapping in a porous medium with coarse textured inclusions}, volume = 64, year = 2016 }
18. Fraundorf, P., & Lipp, M. (2016). Molar standards & information units in the ‘new-SI’. https://hal.archives-ouvertes.fr/hal-01381003/file/MolarStandardsAndInformationUnits.pdf
  - BibTeX
  - Link
  BibTeX
  @article{fraundorf:hal-01381003, author = {Fraundorf, Phil and Lipp, Melanie}, month = {10}, note = {hal-id: hal-01381003, v1}, title = {Molar standards & information units in the 'new-SI'}, url = {https://hal.archives-ouvertes.fr/hal-01381003/file/MolarStandardsAndInformationUnits.pdf}, year = 2016 }
  Link
  https://hal.archives-ouvertes.fr/hal-01381003/file/MolarStandardsAndInformationUnits.pdf
19. Blatt, M., Burchardt, A., Dedner, A., Engwer, C., Fahlke, J., Flemisch, B., Gersbacher, C., Gräser, C., Gruber, F., Grüninger, C., Kempf, D., Klöfkorn, R., Malkmus, T., Müthing, S., Nolte, M., Piatkowski, M., & Sander, O. (2016). The Distributed and Unified Numerics Environment, Version 2.4. Archive of Numerical Software, 4, Article 100. https://doi.org/10.11588/ans.2016.100.26526
  - BibTeX
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  BibTeX
  @article{dune2.4, author = {Blatt, Markus and Burchardt, Ansgar and Dedner, Andreas and Engwer, Christian and Fahlke, Jorrit and Flemisch, Bernd and Gersbacher, Christoph and Gräser, Carsten and Gruber, Felix and Grüninger, Christoph and Kempf, Dominic and Klöfkorn, Robert and Malkmus, Tobias and Müthing, Steffen and Nolte, Martin and Piatkowski, Marian and Sander, Oliver}, doi = {10.11588/ans.2016.100.26526}, journal = {Archive of Numerical Software}, month = {03}, note = {, IWS2ID=4348 }, number = 100, page = {13--29}, title = {The Distributed and Unified Numerics Environment, Version 2.4}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2016/26526-90825-1-PB.pdf}, volume = 4, year = 2016 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2016/26526-90825-1-PB.pdf
20. Beck, M., Seitz, G., & Class, H. (2016). Volume-Based Modelling of Fault Reactivation in Porous Media Using a Visco-Elastic Proxy Model. Transport in Porous Media.
  - BibTeX
  BibTeX
  @article{NULL, author = {Beck, Martin and Seitz, Gabriele and Class, Holger}, journal = {Transport in Porous Media}, month = {03}, note = {, IWS2ID=4366 }, page = {DOI10.1007/s11}, title = {Volume-Based Modelling of Fault Reactivation in Porous Media Using a Visco-Elastic Proxy Model}, year = 2016 }
21. Kissinger, A., Noack, V., Knopf, S., Konrad, W., Scheer, D., & Class, H. (2016). Brine migration along vertical pathways due to CO2 injection - a simulated case study in the North German Basin with stakeholder involvement. https://doi.org/10.5194/hess-2016-281
  - BibTeX
  BibTeX
  @article{Kissinger2016a, author = {Kissinger, Alexander and Noack, Vera and Knopf, Stefan and Konrad, Wilfried and Scheer, Dirk and Class, Holger}, doi = {10.5194/hess-2016-281}, month = {06}, note = {, IWS2ID=4379 , Partnerinstitution: Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Dialogik }, title = {Brine migration along vertical pathways due to CO2 injection - a simulated case study in the North German Basin with stakeholder involvement}, year = 2016 }
2015
1. Scheer, D., Konrad, W., Class, H., Kissinger, A., Knopf, S., & Noack, V. (2015). Expert involvement in science development: (re-)evaluation of an early screening tool for carbon storage site characterization. International Journal of Greenhouse Gas Control, 37.
  - BibTeX
  BibTeX
  @article{NULL, author = {Scheer, Dirk and Konrad, Wilfried and Class, Holger and Kissinger, Alexander and Knopf, Stefan and Noack, Vera}, journal = {International Journal of Greenhouse Gas Control}, month = {03}, note = {, IWS2ID=3054 , Partneraddress: St. Moritz, Schweiz }, page = {228-236}, title = {Expert involvement in science development: (re-)evaluation of an early screening tool for carbon storage site characterization}, volume = 37, year = 2015 }
2. Hommel, J., Lauchnor, E., Phillips, A., Gerlach, R., Cunningham, A. B., Helmig, R., Ebigbo, A., & Class, H. (2015). A revised model for microbially induced calcite precipitation: Improvements and new insights based on recent experiments. Water Resources Research, 51, Article 5. https://doi.org/10.1002/2014WR016503
  - BibTeX
  BibTeX
  @article{Hommel2015a, author = {Hommel, Johannes and Lauchnor, Ellen and Phillips, Adrienne and Gerlach, Robin and Cunningham, Alfred B. and Helmig, Rainer and Ebigbo, Anozie and Class, Holger}, doi = {10.1002/2014WR016503}, journal = {Water Resources Research}, month = {05}, note = {, IWS2ID=3059 , Partnerinstitution: Montana State University , Partneraddress: Bozeman, Montana, USA }, number = 5, page = {3695-3715}, title = {A revised model for microbially induced calcite precipitation: Improvements and new insights based on recent experiments}, volume = 51, year = 2015 }
3. Class, H., Mahl, L., Ahmed, W., Norden, B., Kühn, M., & Kempka, T. (2015). Matching Pressure Measurements and Observed CO2 Arrival Times with Static and Dynamic Modelling at the Ketzin Storage site. Energy Procedia, 76.
  - BibTeX
  BibTeX
  @article{NULL, author = {Class, Holger and Mahl, Lena and Ahmed, Waqas and Norden, Ben and Kühn, Michael and Kempka, Thomas}, journal = {Energy Procedia}, month = {08}, note = {, IWS2ID=3111 , Partnerinstitution: Geoforschungszentrum Potsdam , Partneraddress: Potsdam }, page = {623-632}, title = {Matching Pressure Measurements and Observed CO2 Arrival Times with Static and Dynamic Modelling at the Ketzin Storage site }, volume = 76, year = 2015 }
4. Kleinknecht, S., Class, H., & Braun, J. (2015). Density-Driven Migration of Heavy NAPL Vapor in the Unsaturated Zone. Vadose Zone Journal, 14.
  - BibTeX
  BibTeX
  @article{kleinknecht2015densitydriven, author = {Kleinknecht, Simon and Class, Holger and Braun, Jürgen}, journal = {Vadose Zone Journal}, month = {08}, note = {, IWSID=3146 }, title = {Density-Driven Migration of Heavy NAPL Vapor in the Unsaturated Zone}, volume = 14, year = 2015 }
5. Rybak, I., Magiera, J., Helmig, R., & Rohde, C. (2015). Multirate time integration for coupled saturated/unsaturated porous medium and free flow systems. Computational Geosciences. https://doi.org/10.1007/s10596-015-9469-8
  - BibTeX
  BibTeX
  @article{NULL, author = {Rybak, Iryna and Magiera, Jim and Helmig, Rainer and Rohde, Christian}, doi = {10.1007/s10596-015-9469-8}, journal = {Computational Geosciences}, month = {02}, note = {, IWS2ID=2990 , Partnerinstitution: Institut für Angewandte Analysis und Numerische Simulation }, title = {Multirate time integration for coupled saturated/unsaturated porous medium and free flow systems}, year = 2015 }
6. Schwenck, N., Flemisch, B., Helmig, R., & Wohlmuth, B. I. (2015). Dimensionally reduced flow models in fractured porous media: crossings and boundaries. Computational Geosciences, 19, Article 6. https://doi.org/10.1007/s10596-015-9536-1
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Schwenck, Nicolas and Flemisch, Bernd and Helmig, Rainer and Wohlmuth, Barbara I.}, doi = {10.1007/s10596-015-9536-1}, journal = {Computational Geosciences}, month = {09}, note = {, IWS2ID=3141 , Partnerinstitution: Lehrstuhl für Numerische Mathematik , Partneraddress: München }, number = 6, page = {1219-1230}, title = {Dimensionally reduced flow models in fractured porous media: crossings and boundaries}, url = {http://link.springer.com/article/10.1007/s10596-015-9536-1}, volume = 19, year = 2015 }
  Link
  http://link.springer.com/article/10.1007/s10596-015-9536-1
7. Nuske, P., Ronneberger, O., Karadimitriou, N., Helmig, R., & Hassanizadeh, S. M. (2015). Modelling Multi-Phase Flow in a Micro-Model with Local Thermal Non-Equilibrium on the Darcy Scale. International Journal of Heat and Mass Transfer, 88.
  - BibTeX
  BibTeX
  @article{NULL, author = {Nuske, Philipp and Ronneberger, Olaf and Karadimitriou, Nikos and Helmig, Rainer and Hassanizadeh, S. Majid}, journal = {International Journal of Heat and Mass Transfer}, month = {10}, note = {, IWS2ID=2995 }, page = {822-835}, title = {Modelling Multi-Phase Flow in a Micro-Model with Local Thermal Non-Equilibrium on the Darcy Scale}, volume = 88, year = 2015 }
8. Enzenhöfer, R., Nowak, W., & Binning, P. J. (2015). Stakeholder-Objective Risk Model (STORM): Assessing the risk of multiple contaminant sources in groundwater catchments for pumping well management. Advances in Water Resources, 83. https://doi.org/10.1016/j.advwatres.2015.05.015
  - BibTeX
  BibTeX
  @article{NULL, author = {Enzenhöfer, Rainer and Nowak, Wolfgang and Binning, Philip J.}, doi = {10.1016/j.advwatres.2015.05.015}, journal = {Advances in Water Resources}, month = {08}, note = {, IWS2ID=2986 }, page = {165-175}, title = {Stakeholder-Objective Risk Model (STORM): Assessing the risk of multiple contaminant sources in groundwater catchments for pumping well management}, volume = 83, year = 2015 }
9. Kaulmann, S., Flemisch, B., Haasdonk, B., Lie, K.-A., & Ohlberger, M. (2015). The localized reduced basis multiscale method for two-phase flows in porous media. International Journal of Numerical Methods in Engineering, 102. https://onlinelibrary.wiley.com/doi/10.1002/nme.4773/full
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Kaulmann, Sven and Flemisch, Bernd and Haasdonk, Bernard and Lie, Knut-Andreas and Ohlberger, Mario}, journal = {International Journal of Numerical Methods in Engineering}, month = {05}, note = {, IWS2ID=4350 }, page = {1018-1040}, title = {The localized reduced basis multiscale method for two-phase flows in porous media}, url = {https://onlinelibrary.wiley.com/doi/10.1002/nme.4773/full}, volume = 102, year = 2015 }
  Link
  https://onlinelibrary.wiley.com/doi/10.1002/nme.4773/full
10. Gerbersdorf, S. U., Cimatoribus, C., Class, H., Engesser, K.-H., Helbich, S., Hollert, H., Lange, C., Kranert, M., Metzger, J. W., Nowak, W., Seiler, T.-B., Steger, K., Steinmetz, H., & Wieprecht, S. (2015). Anthropogenic Trace Compounds (ATCs) in aquatic habitats - Research needs on sources, fate, detection and toxicity to ensure timely elimination strategies and risk management. Environment International, Vol.79.2015. https://doi.org/10.1016/j.envint.2015.03.011
  - BibTeX
  BibTeX
  @article{NULL, author = {Gerbersdorf, Sabine Ulrike and Cimatoribus, Carla and Class, Holger and Engesser, Karl-H. and Helbich, Steffen and Hollert, Henner and Lange, Claudia and Kranert, Martin and Metzger, Jörg W. and Nowak, Wolfgang and Seiler, Thomas-Benjamin and Steger, Kristin and Steinmetz, Heidrun and Wieprecht, Silke}, doi = {10.1016/j.envint.2015.03.011}, journal = {Environment International}, month = {06}, note = {, IWS2ID=3074 , Institution: Institut für Wasserbau , Address: Universität Stuttgart , Partnerinstitution: Institut für Siedlungswasserbau, Wassergüte- und Abfallwirtschaft }, page = {pp.85-105}, title = {Anthropogenic Trace Compounds (ATCs) in aquatic habitats - Research needs on sources, fate, detection and toxicity to ensure timely elimination strategies and risk management}, type = {Bericht}, volume = {Vol.79.2015}, year = 2015 }
11. Faigle, B., Elfeel, M. A., Helmig, R., Becker, B., Flemisch, B., & Geiger, S. (2015). Multi-physics modeling of non-isothermal compositional flow on adaptive grids. Computational Methods in Applied Mechanical Engineering, 292. https://doi.org/10.1016/j.cma.2014.11.030
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Faigle, Benjamin and Elfeel, Mohamed Ahmed and Helmig, Rainer and Becker, Beatrix and Flemisch, Bernd and Geiger, Sebastian}, doi = {10.1016/j.cma.2014.11.030}, journal = {Computational Methods in Applied Mechanical Engineering}, month = {12}, note = {, IWS2ID=3025 }, page = {16-34}, title = {Multi-physics modeling of non-isothermal compositional flow on adaptive grids}, url = {http://www.sciencedirect.com/science/article/pii/S0045782514004630}, volume = 292, year = 2015 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0045782514004630
12. Tatomir, A., Schaffer, M., Kissinger, A., Hommel, J., Nuske, P., Licha, T., Helmig, R., & Sauter, M. (2015). Novel approach for modeling kinetic interface-sensitive (KIS) tracers with respect to time-dependent interfacial area change for the optimization of supercritical carbon dioxide injection into deep saline aquifers. International Journal of Greenhouse Gas Control, 33. https://doi.org/10.1016/j.ijggc.2014.11.020
  - BibTeX
  BibTeX
  @article{NULL, author = {Tatomir, Alexandru and Schaffer, Mario and Kissinger, Alexander and Hommel, Johannes and Nuske, Philipp and Licha, Tobias and Helmig, Rainer and Sauter, Martin}, doi = {10.1016/j.ijggc.2014.11.020}, journal = {International Journal of Greenhouse Gas Control}, month = {12}, note = {, IWS2ID=3013 }, page = {145-153}, title = {Novel approach for modeling kinetic interface-sensitive (KIS) tracers with respect to time-dependent interfacial area change for the optimization of supercritical carbon dioxide injection into deep saline aquifers}, volume = 33, year = 2015 }
2014
1. Enzenhöfer, R., Bunk, T., & Nowak, W. (2014). Nine steps to risk-informed wellhead protection and management: A case study. Ground Water, 52. https://doi.org/10.1111/gwat.12161
  - BibTeX
  BibTeX
  @article{NULL, author = {Enzenhöfer, Rainer and Bunk, Tobias and Nowak, Wolfgang}, doi = {10.1111/gwat.12161}, journal = {Ground Water}, month = {02}, note = {, IWS2ID=2801 , Partnerinstitution: Zweckverband Landeswasserversorgung }, page = {161-174}, title = {Nine steps to risk-informed wellhead protection and management: A case study}, volume = 52, year = 2014 }
2. Lindner, F., Nuske, P., Helmig, R., Mundt, C., & Pfitzner, M. (2014). Transpiration Cooling with Local Thermal Non-Equilibrium: Model Comparison in Multiphase Flow in Porous Media. Journal of Porous Media.
  - BibTeX
  BibTeX
  @article{NULL, author = {Lindner, Franz and Nuske, Philipp and Helmig, Rainer and Mundt, Christian and Pfitzner, Michael}, journal = {Journal of Porous Media}, month = {04}, note = {accepted, IWS2ID=2927 }, title = {Transpiration Cooling with Local Thermal Non-Equilibrium: Model Comparison in Multiphase Flow in Porous Media}, year = 2014 }
3. Schaedle, P., Hubschwerlen, N., & Class, H. (2014). Optimizing the modeling performance for safety assessments of nuclear waste repositories by approximating two-phase flow and transport by single-phase transport simulations. Nuclear Technology, 187.
  - BibTeX
  BibTeX
  @article{NULL, author = {Schaedle, Philipp and Hubschwerlen, Nicolas and Class, Holger}, journal = {Nuclear Technology}, month = {08}, note = {, IWS2ID=3078 , Partnerinstitution: AF Consult, Schweiz }, page = {188-197}, title = {Optimizing the modeling performance for safety assessments of nuclear waste repositories by approximating two-phase flow and transport by single-phase transport simulations}, volume = 187, year = 2014 }
4. Huber, K., Vanderborght, J., Javaux, M., Schröder, N., Dodd, I. C., & Vereecken, H. (2014). Modelling the impact of heterogeneous rootzone water distribution on the regulation of transpiration by hormone transport and/or hydraulic pressures. Plant and Soil, 384. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/PS_Huber_2014.pdf
  - BibTeX
  - Link
  BibTeX
  @article{Huber2014, author = {Huber, Katrin and Vanderborght, Jan and Javaux, Mathieu and Schröder, Natalie and Dodd, Ian C. and Vereecken, Harry}, journal = {Plant and Soil}, month = {07}, note = {, IWS2ID=3122 , Partnerinstitution: Forschungszentrum Jülich (FZJ) , Partneraddress: Jülich }, page = {01--20}, title = {Modelling the impact of heterogeneous rootzone water distribution on the regulation of transpiration by hormone transport and/or hydraulic pressures}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/PS_Huber_2014.pdf}, volume = 384, year = 2014 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/PS_Huber_2014.pdf
5. Schmid, K. S., Groß, J., & Helmig, R. (2014). Chemical osmosis in two-phase flow and salinity-dependent capillary pressures in rocks with microporosity. Water Resources Research. https://doi.org/10.1002/2013WR013848
  - BibTeX
  BibTeX
  @article{NULL, author = {Schmid, Karen Sophie and Groß, Joachim and Helmig, Rainer}, doi = {10.1002/2013WR013848}, journal = {Water Resources Research}, month = {01}, note = {, IWS2ID=2906 }, title = {Chemical osmosis in two-phase flow and salinity-dependent capillary pressures in rocks with microporosity}, year = 2014 }
6. Kröker, I., Nowak, W., & Rohde, C. (2014). A stochastically and spatially adaptive parallel scheme for uncertain and non-linear two-phase flow problems. Computational Geosciences.
  - BibTeX
  BibTeX
  @article{NULL, author = {Kröker, Ilja and Nowak, Wolfgang and Rohde, Christian}, journal = {Computational Geosciences}, month = {08}, note = {, IWS2ID=2984 , Partnerinstitution: Institut für Angewandte Analysis und Numerische Simulation }, title = {A stochastically and spatially adaptive parallel scheme for uncertain and non-linear two-phase flow problems}, year = 2014 }
7. Maier, C., Schmid, K. S., Ahmed, M., & Geiger, S. (2014). Multi-Rate Mass-Transfer Dual-Porosity Modelling Using the Exact Analytical Solution for Spontaneous Imbibition. Society of Petroleum Engineers. https://doi.org/0.2118/164926-MS
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Maier, Christine and Schmid, Karen Sophie and Ahmed, Mohamed and Geiger, Sebastian}, doi = {0.2118/164926-MS}, journal = {Society of Petroleum Engineers}, month = {07}, note = {, IWS2ID=2967 }, title = {Multi-Rate Mass-Transfer Dual-Porosity Modelling Using the Exact Analytical Solution for Spontaneous Imbibition }, url = {https://www.onepetro.org/conference-paper/SPE-164926-MS}, year = 2014 }
  Link
  https://www.onepetro.org/conference-paper/SPE-164926-MS
8. Mosthaf, K., Helmig, R., & Or, D. (2014). Modeling and analysis of evaporation processes from porous media on the REV scale. Water Resources Research, 50. https://doi.org/10.1002/2013WR014442
  - BibTeX
  BibTeX
  @article{NULL, author = {Mosthaf, Klaus and Helmig, Rainer and Or, Dani}, doi = {10.1002/2013WR014442}, journal = {Water Resources Research}, month = {01}, note = {, IWS2ID=2858 }, page = {01--21}, title = {Modeling and analysis of evaporation processes from porous media on the REV scale }, volume = 50, year = 2014 }
9. Faigle, B., Helmig, R., Aavatsmark, I., & Flemisch, B. (2014). Efficient multiphysics modelling with adaptive grid-refinement using an MPFA method. Computational Geosciences, 18, Article 5. https://doi.org/10.1007/s10596-014-9407-1
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Faigle, Benjamin and Helmig, Rainer and Aavatsmark, Ivar and Flemisch, Bernd}, doi = {10.1007/s10596-014-9407-1}, journal = {Computational Geosciences}, month = {03}, note = {, IWS2ID=2893 }, number = 5, page = {625-636}, title = {Efficient multiphysics modelling with adaptive grid-refinement using an MPFA method}, url = {http://link.springer.com/article/10.1007/s10596-014-9407-1}, volume = 18, year = 2014 }
  Link
  http://link.springer.com/article/10.1007/s10596-014-9407-1
10. Schöniger, A., Wöhling, T., Samaniego, L., & Nowak, W. (2014). Model selection on solid ground: rigorous comparison of nine ways to evaluate Bayesian evidence. Water Resources Research.
  - BibTeX
  BibTeX
  @article{NULL, author = {Schöniger, Anneli and Wöhling, Thomas and Samaniego, L. and Nowak, Wolfgang}, journal = {Water Resources Research}, month = {08}, note = {, IWS2ID=2980 , Partnerinstitution: Universität Tübingen }, title = {Model selection on solid ground: rigorous comparison of nine ways to evaluate Bayesian evidence}, year = 2014 }
11. Nowak, W., Bode, F., & Loschko, M. (2014). A multi-objective optimization concept for risk-based early-warning monitoring networks in well catchments.
  - BibTeX
  BibTeX
  @article{NULL, author = {Nowak, Wolfgang and Bode, Felix and Loschko, Mathias}, month = {08}, note = {, IWS2ID=2981 }, title = {A multi-objective optimization concept for risk-based early-warning monitoring networks in well catchments}, year = 2014 }
12. Wöhling, T., Schöniger, A., & Nowak, W. (2014). Bayesian model averaging to explore the worth of data for maximum-confidence soil-plant model selection and prediction. Water Resources Research.
  - BibTeX
  BibTeX
  @article{NULL, author = {Wöhling, Thomas and Schöniger, Anneli and Nowak, Wolfgang}, journal = {Water Resources Research}, month = {08}, note = {, IWS2ID=2985 , Partnerinstitution: Universität Tübingen }, title = {Bayesian model averaging to explore the worth of data for maximum-confidence soil-plant model selection and prediction}, year = 2014 }
13. Nuske, P., Joekar-Niasar, V., & Helmig, R. (2014). Non-Equilibrium in Multiphase Multicomponent Flow in Porous Media: An Evaporation Example. International Journal of Heat and Mass Transfer. https://doi.org/10.1016/j.ijheatmasstransfer.2014.03.011
  - BibTeX
  BibTeX
  @article{NULL, author = {Nuske, Philipp and Joekar-Niasar, Vahid and Helmig, Rainer}, doi = {10.1016/j.ijheatmasstransfer.2014.03.011}, journal = {International Journal of Heat and Mass Transfer}, month = {05}, note = {, IWS2ID=2829 }, title = {Non-Equilibrium in Multiphase Multicomponent Flow in Porous Media: An Evaporation Example}, year = 2014 }
14. Koch, J., & Nowak, W. (2014). A method for implementing Dirichlet and third-type boundary conditions in PTRW simulations. Water Resources Research, 50, Article 2. https://doi.org/10.1002/2013WR013796
  - BibTeX
  BibTeX
  @article{NULL, author = {Koch, Jonas and Nowak, Wolfgang}, doi = {10.1002/2013WR013796}, journal = {Water Resources Research}, month = {01}, note = {, IWS2ID=2839 }, number = 2, page = {1374-1395}, title = {A method for implementing Dirichlet and third-type boundary conditions in PTRW simulations}, volume = 50, year = 2014 }
15. Karadimitriou, N., Nuske, P., Kleingeld, P., Hassanizadeh, S. M., & Helmig, R. (2014). Simultaneous thermal and optical imaging of two-phase flow in a micro-model. https://doi.org/10.1039/c4lc00321g
  - BibTeX
  BibTeX
  @article{NULL, author = {Karadimitriou, Nikos and Nuske, Philipp and Kleingeld, Pieter and Hassanizadeh, S. Majid and Helmig, Rainer}, doi = {10.1039/c4lc00321g}, month = {03}, note = {, IWS2ID=2929 , Partnerinstitution: University of Utrecht }, title = {Simultaneous thermal and optical imaging of two-phase flow in a micro-model}, year = 2014 }
16. Köppl, T., Schneider, M., Pohl, U., & Wohlmuth, B. I. (2014). The influence of an unilateral carotid artery stenosis on brain oxygenation. Medical Engineering and Physics, 36(7).
  - BibTeX
  BibTeX
  @article{NULL, author = {Köppl, Tobias and Schneider, Martin and Pohl, Ulrich and Wohlmuth, Barbara I.}, journal = {Medical Engineering and Physics}, month = {04}, note = {, IWS2ID=2979 }, page = {905-914}, title = {The influence of an unilateral carotid artery stenosis on brain oxygenation}, volume = {36(7)}, year = 2014 }
17. Szymkiewicz, A., Neuweiler, I., & Helmig, R. (2014). Influence of heterogeneous air entry pressure on large scale unsaturated flow in porous media. Computers in Biology and Medicine, 62. https://doi.org/10.2478/s11600-014-0224-7
  - BibTeX
  BibTeX
  @article{NULL, author = {Szymkiewicz, Adam and Neuweiler, Insa and Helmig, Rainer}, doi = {10.2478/s11600-014-0224-7}, journal = {Computers in Biology and Medicine}, month = {10}, note = {, IWS2ID=2987 , Partnerinstitution: Gdansk University of Technology , Partneraddress: Leibniz Universität Hannover }, page = {1179-1191}, title = {Influence of heterogeneous air entry pressure on large scale unsaturated flow in porous media}, volume = 62, year = 2014 }
18. Kissinger, A., Noack, V., Knopf, S., Scheer, D., Konrad, W., & Class, H. (2014). Characterization of reservoir conditions for CO2 storage using a dimensionless Gravitational Number applied to the North German Basin. Sustainable Energy Technologies and Assessments, 7. https://doi.org/10.1016/j.seta.2014.06.003
  - BibTeX
  BibTeX
  @article{NULL, author = {Kissinger, Alexander and Noack, Vera and Knopf, Stefan and Scheer, Dirk and Konrad, Wilfried and Class, Holger}, doi = {10.1016/j.seta.2014.06.003}, journal = {Sustainable Energy Technologies and Assessments}, month = {06}, note = {, IWS2ID=2965 , Partnerinstitution: Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Dialogik }, page = {209-220}, title = {Characterization of reservoir conditions for CO2 storage using a dimensionless Gravitational Number applied to the North German Basin}, volume = 7, year = 2014 }
2013
1. Kissinger, A., Helmig, R., Ebigbo, A., Class, H., Lange, T., Sauter, M., Heitfeld, M., Klünker, J., & Jahnke, W. (2013). Hydraulic fracturing in unconventional gas reservoirs: risks in the geological system, part 2. Environmental Earth Sciences. https://doi.org/10.1007/s12665-013-2578-6
  - BibTeX
  BibTeX
  @article{NULL, author = {Kissinger, Alexander and Helmig, Rainer and Ebigbo, Anozie and Class, Holger and Lange, Torsten and Sauter, Martin and Heitfeld, Michael and Klünker, Johannes and Jahnke, Wiebke}, doi = {10.1007/s12665-013-2578-6}, journal = {Environmental Earth Sciences}, month = {06}, note = {, IWS2ID=2846 }, title = {Hydraulic fracturing in unconventional gas reservoirs: risks in the geological system, part 2}, year = 2013 }
2. Nowak, W., & Litvinenko, A. (2013). Kriging accelerated by orders of magnitude: combining low-rank covariance approximations with FFT-techniques. Mathematical Geosciences, 45, Article 4. https://doi.org/10.1007/s11004-013-9453-6
  - BibTeX
  BibTeX
  @article{NULL, author = {Nowak, Wolfgang and Litvinenko, Alexander}, doi = {10.1007/s11004-013-9453-6}, journal = {Mathematical Geosciences}, month = {08}, note = {, IWS2ID=2758 , Partnerinstitution: Institute for Scientific Computing, Technical University of Braunschweig , Partneraddress: Braunschweig }, number = 4, page = {411-435}, title = {Kriging accelerated by orders of magnitude: combining low-rank covariance approximations with FFT-techniques}, volume = 45, year = 2013 }
3. Helmig, R., Flemisch, B., Wolff, M., Ebigbo, A., & Class, H. (2013). Model coupling for multiphase flow in porous media. Advances in Water Resources, 51. https://doi.org/10.1016/j.advwatres.2012.07.003
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Helmig, Rainer and Flemisch, Bernd and Wolff, Markus and Ebigbo, Anozie and Class, Holger}, doi = {10.1016/j.advwatres.2012.07.003}, journal = {Advances in Water Resources}, month = {07}, note = {, IWS2ID=2774 }, page = {52-66}, title = {Model coupling for multiphase flow in porous media}, url = {http://www.sciencedirect.com/science/article/pii/S0309170812001911}, volume = 51, year = 2013 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0309170812001911
4. Hommel, J., Cunningham, A. B., Helmig, R., Ebigbo, A., & Class, H. (2013). Numerical Investigation of Microbially Induced Calcite Precipitation as a Leakage Mitigation Technology. Energy Procedia, 40,2013. https://doi.org/10.1016/j.egypro.2013.08.045
  - BibTeX
  - Link
  BibTeX
  @article{Hommel2013a, author = {Hommel, Johannes and Cunningham, Alfred B. and Helmig, Rainer and Ebigbo, Anozie and Class, Holger}, doi = {10.1016/j.egypro.2013.08.045}, journal = {Energy Procedia}, month = {08}, note = {, date=09.04.2013, IWS2ID=2881 , Institution: European Geosciences Union }, page = {392-397}, title = {Numerical Investigation of Microbially Induced Calcite Precipitation as a Leakage Mitigation Technology}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2013/Hommel2013_EnergyProcedia.pdf}, volume = {40,2013}, year = 2013 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2013/Hommel2013_EnergyProcedia.pdf
5. Walter, L., Binning, P. J., & Class, H. (2013). Predicting salt intrusion into freshwater aquifers resulting from CO2 injection - a study on the influence of conservative assumptions. Advances in Water Resources, 62.
  - BibTeX
  BibTeX
  @article{NULL, author = {Walter, Lena and Binning, Philip J. and Class, Holger}, journal = {Advances in Water Resources}, month = {08}, note = {, IWS2ID=2854 }, page = {543-554}, title = {Predicting salt intrusion into freshwater aquifers resulting from CO2 injection - a study on the influence of conservative assumptions}, volume = 62, year = 2013 }
6. Kempka, T., Class, H., Görke, U.-J., Norden, B., Kolditz, O., Kühn, M., Walter, L., Wang, W., & Zehner, B. (2013). A dynamic flow simulation code intercomparison based on the revised static model of the Ketzin pilot site. Energy Procedia, 40.
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  BibTeX
  @article{NULL, author = {Kempka, Thomas and Class, Holger and Görke, Uwe-Jens and Norden, Ben and Kolditz, Olaf and Kühn, Michael and Walter, Lena and Wang, Wenqing and Zehner, Björn}, journal = {Energy Procedia}, month = {09}, note = {, IWS2ID=2853 }, page = {418-427}, title = {A dynamic flow simulation code intercomparison based on the revised static model of the Ketzin pilot site}, volume = 40, year = 2013 }
7. Pracht, U. S., Heintze, E., Clauss, C., Hafner, D., Bek, R., Werner, D., Gelhorn, S., Scheffler, M., Dressel, M., Sherman, D., Gorshunov, B., Il’in, K. S., Henrich, D., & Siegel, M. (2013). Electrodynamics of the Superconducting State in Ultra-Thin Films at THz Frequencies. IEEE Transactions on Terahertz Science and Technology, 3, Article 3. https://doi.org/10.1109/TTHZ.2013.2255047
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  BibTeX
  @article{6497687, abstract = {In this paper, we report on terahertz frequency-domain spectroscopy (THz-FDS) experiments in which we measure charge carrier dynamics and excitations of thin-film superconducting systems at low temperatures in the THz spectral range. The characteristics of the set-up and the experimental procedures are described comprehensively. We discuss the single-particle density of states and a theory of electrodynamic absorption and optical conductivity of conventional superconductors. We present the experimental performance of the setup at low temperatures for a broad spectral range from 3 to 38 cm-1(0.1-1.1 THz) by the example of ultra-thin films of weakly disordered superconductors niobium nitride (NbN) and tantalum nitride (TaN) with different values of critical temperaturesTc. Furthermore, we analyze and interpret our experimental data within the framework of conventional Bardeen-Cooper-Schrieffer (BCS) theory of superconductivity. By and large, we find the properties of our NbN and TaN thin films to be well described by the theory. Our results on NbN resemble tendencies towards anomalous behavior of the ratio 2Δ(0)/kBTcas a function ofTc.}, author = {{Pracht}, U. S. and {Heintze}, E. and {Clauss}, C. and {Hafner}, D. and {Bek}, R. and {Werner}, D. and {Gelhorn}, S. and {Scheffler}, M. and {Dressel}, M. and {Sherman}, D. and {Gorshunov}, B. and {Il'in}, K. S. and {Henrich}, D. and {Siegel}, M.}, doi = {10.1109/TTHZ.2013.2255047}, issn = {2156-3446}, journal = {IEEE Transactions on Terahertz Science and Technology}, month = {05}, number = 3, pages = {269-280}, title = {Electrodynamics of the Superconducting State in Ultra-Thin Films at THz Frequencies}, url = {https://ieeexplore.ieee.org/document/6497687/}, volume = 3, year = 2013 }
  Link
  https://ieeexplore.ieee.org/document/6497687/
8. Köppl, T., Wohlmuth, B. I., & Helmig, R. (2013). Reduced one-dimensional modelling and numerical simulation for mass transport in fluids. International Journal for Numerical Methods in Fluids, 72. https://doi.org/10.1002/fld.3728
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  @article{NULL, author = {Köppl, Tobias and Wohlmuth, Barbara I. and Helmig, Rainer}, doi = {10.1002/fld.3728}, journal = {International Journal for Numerical Methods in Fluids}, month = {03}, note = {, IWS2ID=2718 , Partnerinstitution: Lehrstuhl für Numerische Mathematik }, page = {135-156}, title = {Reduced one-dimensional modelling and numerical simulation for mass transport in fluids}, volume = 72, year = 2013 }
9. Wolff, M., Flemisch, B., & Helmig, R. (2013). An adaptive multi-scale approach for modeling two-phase flow in porous media including capillary pressure. Water Resources Research, 49, Article 12. https://onlinelibrary.wiley.com/doi/10.1002/2013WR013800/full
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  @article{NULL, author = {Wolff, Markus and Flemisch, Bernd and Helmig, Rainer}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2833 }, number = 12, page = {8139-8159}, title = {An adaptive multi-scale approach for modeling two-phase flow in porous media including capillary pressure}, url = {https://onlinelibrary.wiley.com/doi/10.1002/2013WR013800/full}, volume = 49, year = 2013 }
  Link
  https://onlinelibrary.wiley.com/doi/10.1002/2013WR013800/full
10. Juanes, R., & Class, H. (2013). Special issue on computational methods in geologic CO2 sequestration. Advances in Water Resources, 62. https://doi.org/10.1016/j.advwatres.2013.10.012
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  @article{NULL, author = {Juanes, Ruben and Class, Holger}, doi = {10.1016/j.advwatres.2013.10.012}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=3072 }, page = {353-355}, title = {Special issue on computational methods in geologic CO2 sequestration}, volume = 62, year = 2013 }
11. Schmid, K. S., & Geiger, S. (2013). Universal Scaling of Spontaneous Imbibition for Arbitrary Petrophysical Properties: Water-Wet and Mixed-Wet States and Handy’s Conjecture. Journal of Petroleum Science and Engineering, 101. https://doi.org/10.1016/j.petrol.2012.11.015
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  @article{NULL, author = {Schmid, Karen Sophie and Geiger, Sebastian}, doi = {10.1016/j.petrol.2012.11.015}, journal = {Journal of Petroleum Science and Engineering}, month = {04}, note = {, IWS2ID=2731 }, page = {44-61}, title = {Universal Scaling of Spontaneous Imbibition for Arbitrary Petrophysical Properties: Water-Wet and Mixed-Wet States and Handy's Conjecture}, volume = 101, year = 2013 }
12. Grathwohl, P., Rügner, H., Wöhling, T., Osenbrück, K., Schwientek, M., Gayler, S., Wollschläger, U., Selle, B., Pause, M., Delfs, J.-O., Grzeschik, M., Weller, U., Ivanov, M., Cirpka, O. A., Maier, A., Kuch, B., Nowak, W., Wulfmeyer, V., Warrach-Sagi, K., et al. (2013). Catchments as Reactors: A comprehensive approach for water fluxes and solute turn-over. Environmental Earth Sciences, 69.
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  @article{NULL, author = {Grathwohl, Peter and Rügner, Hermann and Wöhling, Thomas and Osenbrück, Karsten and Schwientek, Marc and Gayler, Sebastian and Wollschläger, Ute and Selle, Benny and Pause, Marion and Delfs, Jens-Olaf and Grzeschik, Matthias and Weller, Ulrich and Ivanov, Martin and Cirpka, Olaf Arie and Maier, Armin and Kuch, Bertram and Nowak, Wolfgang and Wulfmeyer, Volker and Warrach-Sagi, Kirsten and Streck, Thilo and Attinger, Sabine and Bilke, Lars and Dietrich, Peter and Fleckenstein, Jan H. and Kalbacher, Thomas and Manthey, Sabine}, journal = {Environmental Earth Sciences}, month = {05}, note = {, IWS2ID=2847 }, page = {317-333}, title = {Catchments as Reactors: A comprehensive approach for water fluxes and solute turn-over }, volume = 69, year = 2013 }
13. Oladyshkin, S., Schröder, P., Class, H., & Nowak, W. (2013). Chaos expansion based Bootstrap filter to calibrate CO2 injection models. Energy Procedia, Article 40. https://doi.org/10.1016/j.egypro.2013.08.046
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  @article{NULL, author = {Oladyshkin, Sergey and Schröder, Patrick and Class, Holger and Nowak, Wolfgang}, doi = {10.1016/j.egypro.2013.08.046}, journal = {Energy Procedia}, month = {06}, note = {, IWS2ID=2836 }, number = 40, page = {398-407}, title = {Chaos expansion based Bootstrap filter to calibrate CO2 injection models}, year = 2013 }
14. Ashraf, M., Oladyshkin, S., & Nowak, W. (2013). Geological storage of CO2: global sensitivity analysis and risk assessment using arbitrary polynomial chaos expansion. International Journal of Greenhouse Gas Control, 19. https://doi.org/10.1016/j.ijggc.2013.03.023
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  BibTeX
  @article{NULL, author = {Ashraf, Meisam and Oladyshkin, Sergey and Nowak, Wolfgang}, doi = {10.1016/j.ijggc.2013.03.023}, journal = {International Journal of Greenhouse Gas Control}, month = {03}, note = {, IWS2ID=2777 , Partnerinstitution: University of Bergen, CIPR , Partneraddress: Bergen, Norway }, page = {704-719}, title = {Geological storage of CO2: global sensitivity analysis and risk assessment using arbitrary polynomial chaos expansion}, volume = 19, year = 2013 }
15. Wöhling, T., Geiges, A., Nowak, W., Gayler, S., Högy, P., & Wizemann, H. D. (2013). Towards optimizing experiments for maximum-confidence model selection between different soil-plant models. 19. https://doi.org/10.1016/j.proenv.2013.06.058
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  BibTeX
  @article{NULL, author = {Wöhling, Thomas and Geiges, Andreas and Nowak, Wolfgang and Gayler, Sebastian and Högy, Peter and Wizemann, H.D.}, doi = {10.1016/j.proenv.2013.06.058}, month = {07}, note = {, IWS2ID=2974 , Partnerinstitution: Universität Tübingen }, page = {514?523}, title = {Towards optimizing experiments for maximum-confidence model selection between different soil-plant models}, volume = 19, year = 2013 }
16. Leube, P., de Barros, F. P. J., Nowak, W., & Rajagopal, R. (2013). Towards optimal allocation of computer resources: trade-offs between uncertainty quantification, discretization and model reduction. Environmental Modelling & Software, 50. https://doi.org/10.1016/j.envsoft.2013.08.008
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  @article{NULL, author = {Leube, Philipp and de Barros, Felipe P. J. and Nowak, Wolfgang and Rajagopal, Ram}, doi = {10.1016/j.envsoft.2013.08.008}, journal = {Environmental Modelling & Software}, month = {08}, note = {, IWS2ID=2788 }, page = {97-107}, title = {Towards optimal allocation of computer resources: trade-offs between uncertainty quantification, discretization and model reduction}, volume = 50, year = 2013 }
17. Oladyshkin, S., Class, H., & Nowak, W. (2013). Bayesian updating via Bootstrap filtering combined with data-driven polynomial chaos expansions: methodology and application to history matching for carbon dioxide storage in geological formations. Computational Geosciences, 17, Article 4. https://doi.org/10.1007/s10596-013-9350-6
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  @article{NULL, author = {Oladyshkin, Sergey and Class, Holger and Nowak, Wolfgang}, doi = {10.1007/s10596-013-9350-6}, journal = {Computational Geosciences}, month = {04}, note = {, IWS2ID=2778 }, number = 4, page = {671-687}, title = {Bayesian updating via Bootstrap filtering combined with data-driven polynomial chaos expansions: methodology and application to history matching for carbon dioxide storage in geological formations}, volume = 17, year = 2013 }
18. Lange, T., Sauter, M., Heitfeld, M., Schetelig, K., Brosig, K., Jahnke, W., Kissinger, A., Helmig, R., Ebigbo, A., & Class, H. (2013). Hydraulic fracturing in unconventional gas reservoirs: risks in the geological system, part 1. Environmental Earth Sciences. https://doi.org/10.1007/s12665-013-2803-3
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  BibTeX
  @article{NULL, author = {Lange, Torsten and Sauter, Martin and Heitfeld, Michael and Schetelig, Kurt and Brosig, Karolin and Jahnke, Wiebke and Kissinger, Alexander and Helmig, Rainer and Ebigbo, Anozie and Class, Holger}, doi = {10.1007/s12665-013-2803-3}, journal = {Environmental Earth Sciences}, month = {10}, note = {, IWS2ID=2882 }, title = {Hydraulic fracturing in unconventional gas reservoirs: risks in the geological system, part 1}, year = 2013 }
19. Schröder, N., Lazarovitch, N., Vanderborght, J., Vereecken, H., & Javaux, M. (2013). Linking transpiration reduction to rhizosphere salinity using a 3D coupled soil-plant model. Plant and Soil, 377. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/PS_Schroeder_2013.pdf
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  BibTeX
  @article{Schroeder2013, author = {Schröder, Natalie and Lazarovitch, Naftali and Vanderborght, Jan and Vereecken, Harry and Javaux, Mathieu}, journal = {Plant and Soil}, month = {12}, note = {, IWS2ID=3136 , Partnerinstitution: Forschungszentrum Jülich (FZJ) , Partneraddress: Jülich }, page = {277-293}, title = {Linking transpiration reduction to rhizosphere salinity using a 3D coupled soil-plant model}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/PS_Schroeder_2013.pdf}, volume = 377, year = 2013 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/PS_Schroeder_2013.pdf
2012
1. Stoverud, K. H., Darcis, M., Helmig, R., & Hassanizadeh, S. M. (2012). Modeling concentration distribution and deformation during convection-enhanced drug delivery into brain tissue. Transport in Porous Media, 92, Article 1.
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  @article{NULL, author = {Stoverud, Karen H. and Darcis, Melanie and Helmig, Rainer and Hassanizadeh, S. Majid}, journal = {Transport in Porous Media}, month = {12}, note = {, IWS2ID=2616 }, number = 1, page = {119-143}, title = {Modeling concentration distribution and deformation during convection-enhanced drug delivery into brain tissue}, volume = 92, year = 2012 }
2. Oladyshkin, S., & Nowak, W. (2012). Data-driven uncertainty quantification using the arbitrary polynomial chaos expansion. Reliability Engineering & System Safety, 106. https://doi.org/10.1016/j.ress.2012.05.002
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  BibTeX
  @article{NULL, author = {Oladyshkin, Sergey and Nowak, Wolfgang}, doi = {10.1016/j.ress.2012.05.002}, journal = {Reliability Engineering & System Safety}, month = {12}, note = {, IWS2ID=2534 }, page = {179-190}, title = {Data-driven uncertainty quantification using the arbitrary polynomial chaos expansion}, volume = 106, year = 2012 }
3. Leube, P., Nowak, W., & Schneider, G. (2012). Temporal Moments revisited: Why there is there no better way for physically-based model reduction in time. Water Resources Research, 48. https://doi.org/10.1029/2012WR011973
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  BibTeX
  @article{NULL, author = {Leube, Philipp and Nowak, Wolfgang and Schneider, Guido}, doi = {10.1029/2012WR011973}, journal = {Water Resources Research}, month = {05}, note = {, IWS2ID=2737 }, page = {14}, title = {Temporal Moments revisited: Why there is there no better way for physically-based model reduction in time}, volume = 48, year = 2012 }
4. de Barros, F. P. J., Dentz, M., Koch, J., & Nowak, W. (2012). Flow topology and scalar mixing in spatially heterogeneous flow fields. Geophysical Research Letters, 39, Article L08404. https://doi.org/10.1029/2012GL051302
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  BibTeX
  @article{NULL, author = {de Barros, Felipe P. J. and Dentz, Marco and Koch, Jonas and Nowak, Wolfgang}, doi = {10.1029/2012GL051302}, journal = {Geophysical Research Letters}, month = {02}, note = {, IWS2ID=2710 , Partnerinstitution: Dept. of Geotechnical Engineering and Geosciences, Technical University of Catalonia (UPC) and Spanish National Research Council, IDAEA-CSIC }, number = {L08404}, title = {Flow topology and scalar mixing in spatially heterogeneous flow fields}, volume = 39, year = 2012 }
5. Schmid, K. S., Geiger, S., & Sorbie, K. S. (2012). Analytical solutions for co- and countercurrent imbibition of sorbing, dispersive solutes in immiscible two-phase flow. Computational Geosciences, 16. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2012/Schmid_etal_AnalyticalSolutionsAdsorbing_COmpGEosc.pdf
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  @article{NULL, author = {Schmid, Karen Sophie and Geiger, Sebastian and Sorbie, Ken Stuart}, journal = {Computational Geosciences}, month = {03}, note = {, IWS2ID=2727 }, page = {351-366}, title = {Analytical solutions for co- and countercurrent imbibition of sorbing, dispersive solutes in immiscible two-phase flow}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2012/Schmid_etal_AnalyticalSolutionsAdsorbing_COmpGEosc.pdf}, volume = 16, year = 2012 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2012/Schmid_etal_AnalyticalSolutionsAdsorbing_COmpGEosc.pdf
6. Geiger, S., Schmid, K. S., & Zaretskiy, Y. (2012). Mathematical analysis and numerical simulation of multi-phase multi-component flow in heterogeneous porous media. Cambridge University Press, 17. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2012/geiger_etal2012_CurrOpinionReview.pdf
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Geiger, Sebastian and Schmid, Karen Sophie and Zaretskiy, Yan}, journal = {Cambridge University Press}, month = {04}, note = {, IWS2ID=2732 }, page = {147-155}, title = {Mathematical analysis and numerical simulation of multi-phase multi-component flow in heterogeneous porous media}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2012/geiger_etal2012_CurrOpinionReview.pdf}, volume = 17, year = 2012 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2012/geiger_etal2012_CurrOpinionReview.pdf
7. Schmid, K. S., Geiger, S., & Sorbie, K. S. (2012). Higher Order FE-FV Methods on Unstructured Grids for Transport and Two-Phase Flow with Variable Viscosity in Heterogeneous Porous Media. Journal of Computational Physics, 241. https://doi.org/10.1016/j.jcp.2012.12.017
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  @article{NULL, author = {Schmid, Karen Sophie and Geiger, Sebastian and Sorbie, Ken Stuart}, doi = {10.1016/j.jcp.2012.12.017}, journal = {Journal Of Computational Physics}, month = {04}, note = {, IWS2ID=2730 }, page = {416-444}, title = {Higher Order FE-FV Methods on Unstructured Grids for Transport and Two-Phase Flow with Variable Viscosity in Heterogeneous Porous Media}, volume = 241, year = 2012 }
8. Bauer, S., Class, H., Ebert, M., Feeser, V., Götze, H., Holzheid, A., Kolditz, O., Rosenbaum, S., Rabbel, W., Schäfer, D., & Dahmke, A. (2012). Modeling, parameterization and evaluation of monitoring methods for CO2 storage in deep saline formations: the CO2-MoPa project. Environmental Earth Sciences, 67. https://doi.org/10.1007/s12665-012-1707-y
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  BibTeX
  @article{NULL, author = {Bauer, Sebastian and Class, Holger and Ebert, Markus and Feeser, Volker and Götze, Hans and Holzheid, Astrid and Kolditz, Olaf and Rosenbaum, Sabine and Rabbel, Wolfgang and Schäfer, Dirk and Dahmke, Andreas}, doi = {10.1007/s12665-012-1707-y}, journal = {Environmental Earth Sciences}, month = {09}, note = {, IWS2ID=3076 , Partneraddress: Kiel }, page = {351-367}, title = {Modeling, parameterization and evaluation of monitoring methods for CO2 storage in deep saline formations: the CO2-MoPa project}, volume = 67, year = 2012 }
9. Wolff, M., Flemisch, B., Helmig, R., & Aavatsmark, I. (2012). Treatment of tensorial relative permeabilities with multipoint flux approximation. International Journal of Numerical Analysis & Modeling, 9, Article 3. https://www.math.ualberta.ca/ijnam/Volume-9-2012/No-3-12/2012-03-14.pdf
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  BibTeX
  @article{NULL, author = {Wolff, Markus and Flemisch, Bernd and Helmig, Rainer and Aavatsmark, Ivar}, journal = {International Journal of Numerical Analysis & Modeling}, month = {12}, note = {, IWS2ID=2601 , Partnerinstitution: University of Bergen, CIPR }, number = 3, page = {725-744}, title = {Treatment of tensorial relative permeabilities with multipoint flux approximation}, url = {https://www.math.ualberta.ca/ijnam/Volume-9-2012/No-3-12/2012-03-14.pdf}, volume = 9, year = 2012 }
  Link
  https://www.math.ualberta.ca/ijnam/Volume-9-2012/No-3-12/2012-03-14.pdf
10. Oladyshkin, S., de Barros, F. P. J., & Nowak, W. (2012). Global sensitivity analysis: a flexible and efficient framework with an example from stochastic hydrogeology. Advances in Water Resources, 37. https://doi.org/10.1016/j.advwatres.2011.11.001
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  BibTeX
  @article{NULL, author = {Oladyshkin, Sergey and de Barros, Felipe P. J. and Nowak, Wolfgang}, doi = {10.1016/j.advwatres.2011.11.001}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2621 }, page = {10--22}, title = {Global sensitivity analysis: a flexible and efficient framework with an example from stochastic hydrogeology}, volume = 37, year = 2012 }
11. Erbertseder, K., Reichold, J., Helmig, R., Jenny, P., & Flemisch, B. (2012). A coupled discrete / continuum model for describing cancer therapeutic transport in the lung. PloS ONE (Public Library of Science Online Journal), 7, Article 3. https://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0031966
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  BibTeX
  @article{NULL, author = {Erbertseder, Karin and Reichold, Johannes and Helmig, Rainer and Jenny, Patrick and Flemisch, Bernd}, journal = {PloS ONE (Public Library of Science Online Journal)}, month = {12}, note = {, IWS2ID=2588 , Institution: , Address: , Partnerinstitution: Institute of Fluid Dynamics, ETH , Partneraddress: Zürich, Schweiz }, number = 3, page = {e31966}, title = {A coupled discrete / continuum model for describing cancer therapeutic transport in the lung}, url = {https://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0031966}, volume = 7, year = 2012 }
  Link
  https://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0031966
12. Nowak, W., Rubin, Y., & de Barros, F. P. J. (2012). A Hypothesis-Driven Approach to Optimal Site Investigation. Water Resources Research. https://doi.org/10.1029/2011WR011016
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  BibTeX
  @article{NULL, author = {Nowak, Wolfgang and Rubin, Yoram and de Barros, Felipe P. J.}, doi = {10.1029/2011WR011016}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2624 , Institution: , Address: , Partnerinstitution: Civil and Environmental Engineering, University of California at Berkeley , Partneraddress: Berkeley, USA }, title = {A Hypothesis-Driven Approach to Optimal Site Investigation}, year = 2012 }
13. Jackson, A. S., Rybak, I., Helmig, R., Gray, W. G., & Miller, C. T. (2012). Thermodynamically constrained averaging theory approach for modeling flow and transport phenomena in porous medium systems: 9. Transition region model. Advances in Water Resources, 42. https://doi.org/10.1016/j.advwatres.2012.01.006
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  BibTeX
  @article{NULL, author = {Jackson, A. S. and Rybak, Iryna and Helmig, Rainer and Gray, William G. and Miller, Cass T.}, doi = {10.1016/j.advwatres.2012.01.006}, journal = {Advances in Water Resources}, month = {01}, note = {, IWS2ID=2707 , Partnerinstitution: Institut für Angewandte Analysis und Numerische Simulation und University of North Carolina , Partneraddress: Stuttgart und Chapel Hill, USA }, page = {71-90}, title = {Thermodynamically constrained averaging theory approach for modeling flow and transport phenomena in porous medium systems: 9. Transition region model}, volume = 42, year = 2012 }
14. Schmid, K. S., & Geiger, S. (2012). Universal Scaling of Spontaneous Imbibition for Water Wet Rocks. Water Resources Research, 48. https://doi.org/10.1029/2011WR011566
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Schmid, Karen Sophie and Geiger, Sebastian}, doi = {10.1029/2011WR011566}, journal = {Water Resources Research}, month = {03}, note = {, IWS2ID=2722 }, page = {01--13}, title = {Universal Scaling of Spontaneous Imbibition for Water Wet Rocks}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2012/SchmidGeigerWRR2012UniversalScalingSpontImbibition.pdf}, volume = 48, year = 2012 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2012/SchmidGeigerWRR2012UniversalScalingSpontImbibition.pdf
15. Sauter, M., Helmig, R., & Klünker, J. (2012). Risiken im Geologischen System bei der Fracking-Technologie: Abschätzung der Auswirkungen auf Grundwasservorkmmen. Wasser Und Abfall, Boden, Altlasten, Umweltschutz, 14.
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  @article{NULL, author = {Sauter, Martin and Helmig, Rainer and Klünker, Johannes}, journal = {Wasser und Abfall, Boden, Altlasten, Umweltschutz}, month = {06}, note = {, IWS2ID=2793 }, title = {Risiken im Geologischen System bei der Fracking-Technologie: Abschätzung der Auswirkungen auf Grundwasservorkmmen}, volume = 14, year = 2012 }
16. Richter, T., Rudlof, S., Adjibadji, B., Bernlöhr, H., Grüninger, C., Munz, C.-D., Stock, A., Rohde, C., & Helmig, R. (2012). ViPLab - A Virtual Programming Laboratory for Mathematics and Engineering. Interactive Technology and Smart Education, 9, Article 4. https://doi.org/10.1108/17415651211284039
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  BibTeX
  @article{NULL, author = {Richter, Thomas and Rudlof, Stephan and Adjibadji, Bankole and Bernlöhr, Heiko and Grüninger, Christoph and Munz, Claus-Dieter and Stock, Andreas and Rohde, Christian and Helmig, Rainer}, doi = {10.1108/17415651211284039}, journal = {Interactive Technology and Smart Education}, month = {09}, note = {, IWS2ID=2771 }, number = 4, page = {246-262}, title = {ViPLab - A Virtual Programming Laboratory for Mathematics and Engineering}, volume = 9, year = 2012 }
17. Drewes, J., Geist, J., Hegerl, G., Helmig, R., Huber, H., Jekel, M., Keller, J., Kinzelbach, W., Kögel-Knabner, I., Liebl, W., Manhard, M., Mauser, W., Meckenstock, R., Menzel, A., Mok, B., Nießner, R., Rutschmann, P., Schmidt, T., Wegener, J., et al. (2012). Integrierter Ansatz zur Wasserforschung und Technologieentwicklung. Korrespondenz Abwasser, 59.
  - BibTeX
  BibTeX
  @article{NULL, author = {Drewes, Jürgen and Geist, Jürgen and Hegerl, Gabriele and Helmig, Rainer and Huber, Hans and Jekel, Martin and Keller, Jurg and Kinzelbach, Wolfgang and Kögel-Knabner, Ingrid and Liebl, Wolfgang and Manhard, Michael and Mauser, Wolfram and Meckenstock, Rainer and Menzel, Annette and Mok, Bill and Nießner, Reinhard and Rutschmann, Peter and Schmidt, Torsten and Wegener, Joachim and Werner, Inge and Wilderer, Peter}, journal = {Korrespondenz Abwasser}, month = {10}, note = {, IWS2ID=2776 }, page = {907-911}, title = {Integrierter Ansatz zur Wasserforschung und Technologieentwicklung }, volume = 59, year = 2012 }
18. Oladyshkin, S., & Panfilov, M. (2012). Open thermodynamic model for compressible multicomponent two-phase flow in porous media. Journal of Petroleum Science and Engineering, 81. https://doi.org/10.1016/j.petrol.2011.12.001
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Oladyshkin, Sergey and Panfilov, Mikhail}, doi = {10.1016/j.petrol.2011.12.001}, journal = {Journal of Petroleum Science and Engineering}, month = {12}, note = {, IWS2ID=2680 }, page = {41-48}, title = {Open thermodynamic model for compressible multicomponent two-phase flow in porous media}, url = {http://dx.doi.org/10.1016/j.petrol.2011.12.001}, volume = 81, year = 2012 }
  Link
  http://dx.doi.org/10.1016/j.petrol.2011.12.001
19. Troldborg, M., Nowak, W., Lange, I., Santos, M., Binning, P. J., & Bjerg, P. L. (2012). Application of Bayesian geostatistics for evaluation of mass discharge uncertainty at contaminated sites. Water Resources Research, 48, Article W09535. https://doi.org/10.1029/2011WR011785
  - BibTeX
  BibTeX
  @article{NULL, author = {Troldborg, Mads and Nowak, Wolfgang and Lange, Ida and Santos, M. and Binning, Philip J. and Bjerg, Poul L.}, doi = {10.1029/2011WR011785}, journal = {Water Resources Research}, month = {08}, note = {, IWS2ID=2742 , Partnerinstitution: Dept. of Environmental Engineering, TU Denmark; The James Hutton Institute, UK , Partneraddress: Lyngby, Denmark; Aberdeen, United Kingdom }, number = {W09535}, title = {Application of Bayesian geostatistics for evaluation of mass discharge uncertainty at contaminated sites}, volume = 48, year = 2012 }
20. Nordbotten, J. M., Flemisch, B., Gasda, S. E., Nilsen, H. M., Fan, Y., Pickup, G. E., Wiese, B., Celia, M. A., Dahle, H. K., Eigestad, G. T., & Pruess, K. (2012). Uncertainties in practical simulation of CO2 storage. International Journal of Greenhouse Gas Control, 9. https://www.sciencedirect.com/science/article/pii/S1750583612000655
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Nordbotten, Jan M. and Flemisch, Bernd and Gasda, Sarah E. and Nilsen, H. M. and Fan, Yaqing and Pickup, G. E. and Wiese, B. and Celia, Michael A. and Dahle, Helge K. and Eigestad, G. T. and Pruess, Karsten}, journal = {International Journal of Greenhouse Gas Control}, month = {07}, note = {, IWS2ID=2740 }, page = {234-242}, title = {Uncertainties in practical simulation of CO2 storage}, url = {https://www.sciencedirect.com/science/article/pii/S1750583612000655}, volume = 9, year = 2012 }
  Link
  https://www.sciencedirect.com/science/article/pii/S1750583612000655
21. Schröder, N., Javaux, M., Vanderborght, J., Steffen, B., & Vereecken, H. (2012). Effect of Root Water and Solute Uptake on Apparent Soil Dispersivity: A Simulation Study. Vadose Zone Journal, 11. https://doi.org/10.2136/vzj2012.0009
  - BibTeX
  - Link
  BibTeX
  @article{schroeder2012, author = {Schröder, Natalie and Javaux, Mathieu and Vanderborght, Jan and Steffen, Bernhard and Vereecken, Harry}, doi = {10.2136/vzj2012.0009}, journal = {Vadose Zone Journal}, month = {09}, note = {, IWS2ID=3121 , Partnerinstitution: Forschungszentrum Jülich (FZJ) , Partneraddress: Jülich }, title = {Effect of Root Water and Solute Uptake on Apparent Soil Dispersivity: A Simulation Study}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/VDJ_Schroeder_2012.pdf}, volume = 11, year = 2012 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/VDJ_Schroeder_2012.pdf
22. Leube, P., Geiges, A., & Nowak, W. (2012). Bayesian assessment of the expected data impact on prediction confidence in optimal sampling design. Water Resources Research, 48. https://doi.org/10.1029/2010WR010137
  - BibTeX
  BibTeX
  @article{NULL, author = {Leube, Philipp and Geiges, Andreas and Nowak, Wolfgang}, doi = {10.1029/2010WR010137}, journal = {Water Resources Research}, month = {02}, note = {, IWS2ID=2560 }, page = {16}, title = {Bayesian assessment of the expected data impact on prediction confidence in optimal sampling design}, volume = 48, year = 2012 }
23. Schöniger, A., Nowak, W., & Hendricks Franssen, H.-J. (2012). Parameter estimation by ensemble Kalman filters with transformed data: Approach and application to hydraulic tomography. Water Resources Research, 48, Article W04502. https://doi.org/10.1029/2011WR010462
  - BibTeX
  BibTeX
  @article{NULL, author = {Schöniger, Anneli and Nowak, Wolfgang and Hendricks Franssen, Harrie-Jan}, doi = {10.1029/2011WR010462}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2577 , Partnerinstitution: Forschungszentrum Jülich (FZJ) , Partneraddress: Jülich }, number = {W04502}, title = {Parameter estimation by ensemble Kalman filters with transformed data: Approach and application to hydraulic tomography}, volume = 48, year = 2012 }
24. Baber, K., Mosthaf, K., Flemisch, B., Helmig, R., Müthing, S., & Wohlmuth, B. I. (2012). Numerical scheme for coupling two-phase compositional porous-media flow and one-phase compositional free flow. IMA Journal of Applied Mathematics, 77. https://doi.org/10.1093/imamat/hxs048
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Baber, Katherina and Mosthaf, Klaus and Flemisch, Bernd and Helmig, Rainer and Müthing, Steffen and Wohlmuth, Barbara I.}, doi = {10.1093/imamat/hxs048}, journal = {IMA Journal of Applied Mathematics}, month = {12}, note = {, IWS2ID=2618 , Partnerinstitution: Institut für Visualisierung und Interaktive Systeme , Partneraddress: Universität Stuttgart }, page = {887-909}, title = {Numerical scheme for coupling two-phase compositional porous-media flow and one-phase compositional free flow}, url = {http://imamat.oxfordjournals.org/content/77/6/887.abstract}, volume = 77, year = 2012 }
  Link
  http://imamat.oxfordjournals.org/content/77/6/887.abstract
25. Enzenhöfer, R., Nowak, W., & Helmig, R. (2012). Probabilistic exposure risk assessment with advective-dispersive well vulnerability criteria. Advances in Water Resources, 36. https://doi.org/10.1016/j.advatres.2011.04.018
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Enzenhöfer, Rainer and Nowak, Wolfgang and Helmig, Rainer}, doi = {10.1016/j.advatres.2011.04.018}, journal = {Advances in Water Resources}, month = {01}, note = {, IWS2ID=2557 }, page = {121-132}, title = {Probabilistic exposure risk assessment with advective-dispersive well vulnerability criteria}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/vortraege//ADWR_2010_Enzenhofer_online_vers.pdf}, volume = 36, year = 2012 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/vortraege//ADWR_2010_Enzenhofer_online_vers.pdf
26. Cirpka, O. A., Rolle, M., Chiogna, G., de Barros, F. P. J., & Nowak, W. (2012). Stochastic Evaluation of Mixing-Controlled Steady-State Plume Lengths in Two-Dimensional Heterogeneous Domains. Journal of Contaminant Hydrology, 138-139. https://doi.org/10.1016/j.jconhyd.2012.05.007
  - BibTeX
  BibTeX
  @article{NULL, author = {Cirpka, Olaf Arie and Rolle, M. and Chiogna, G. and de Barros, Felipe P. J. and Nowak, Wolfgang}, doi = {10.1016/j.jconhyd.2012.05.007}, journal = {Journal of Contaminant Hydrology}, month = {09}, note = {, IWS2ID=2706 , Partnerinstitution: Universität Tübingen , Partneraddress: Tübingen }, page = {22-39}, title = {Stochastic Evaluation of Mixing-Controlled Steady-State Plume Lengths in Two-Dimensional Heterogeneous Domains}, volume = {138-139}, year = 2012 }
27. Tartakovsky, D. M., Nowak, W., & Bolster, D. (2012). Introduction to the special issue on uncertainty quantification and risk assessment. Advances in Water Resources, 36.
  - BibTeX
  BibTeX
  @article{NULL, author = {Tartakovsky, Daniel M. and Nowak, Wolfgang and Bolster, Diogo}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2787 }, page = {01--02}, title = {Introduction to the special issue on uncertainty quantification and risk assessment}, volume = 36, year = 2012 }
28. Kuhlmann, A., Neuweiler, I., van der Zee, S. E. A. T. M., & Helmig, R. (2012). Influence of soil structure and root water uptake strategy on steady state unsaturated flow in heterogeneous media. Water Resources Research, 48, Article 2. https://doi.org/10.1029/2011WR010651
  - BibTeX
  BibTeX
  @article{NULL, author = {Kuhlmann, Anna and Neuweiler, Insa and van der Zee, S.E.A.T.M. and Helmig, Rainer}, doi = {10.1029/2011WR010651}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2652 }, number = 2, title = {Influence of soil structure and root water uptake strategy on steady state unsaturated flow in heterogeneous media}, volume = 48, year = 2012 }
29. Walter, L., Binning, P. J., Oladyshkin, S., Flemisch, B., & Class, H. (2012). Brine migration resulting from CO2 injection into saline aquifers - An approach to risk estimation including various levels of uncertainty. International Journal of Greenhouse Gas Control, 9. https://www.sciencedirect.com/science/article/pii/S1750583612001077
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Walter, Lena and Binning, Philip J. and Oladyshkin, Sergey and Flemisch, Bernd and Class, Holger}, journal = {International Journal of Greenhouse Gas Control}, month = {05}, note = {, IWS2ID=2743 }, page = {495-506}, title = {Brine migration resulting from CO2 injection into saline aquifers - An approach to risk estimation including various levels of uncertainty}, url = {https://www.sciencedirect.com/science/article/pii/S1750583612001077}, volume = 9, year = 2012 }
  Link
  https://www.sciencedirect.com/science/article/pii/S1750583612001077
30. Flemisch, B., Kaltenbacher, M., Triebenbacher, S., & Wohlmuth, B. I. (2012). Non-matching grids for a flexible discretization in computational acoustics. 11. https://doi.org/10.4208/cicp.141209.280810s
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Flemisch, Bernd and Kaltenbacher, Manfred and Triebenbacher, Simon and Wohlmuth, Barbara I.}, doi = {10.4208/cicp.141209.280810s}, month = {02}, note = {, IWS2ID=4351 }, page = {472-488}, title = {Non-matching grids for a flexible discretization in computational acoustics}, url = {https://www.global-sci.com/freedownload/v11_472.pdf}, volume = 11, year = 2012 }
  Link
  https://www.global-sci.com/freedownload/v11_472.pdf
2011
1. Flemisch, B., Darcis, M., Erbertseder, K., Faigle, B., Lauser, A., Mosthaf, K., Müthing, S., Nuske, P., Tatomir, A., Wolff, M., & Helmig, R. (2011). DUMUX: DUNE for multi-phase, component, scale, physics, ... flow and transport in porous media. Advances in Water Resources, 34, Article 9. https://doi.org/10.1016/j.advwaters.2011.03.007
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Flemisch, Bernd and Darcis, Melanie and Erbertseder, Karin and Faigle, Benjamin and Lauser, Andreas and Mosthaf, Klaus and Müthing, Steffen and Nuske, Philipp and Tatomir, Alexandru and Wolff, Markus and Helmig, Rainer}, doi = {10.1016/j.advwaters.2011.03.007}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2545 }, number = 9, page = {1102-1112}, title = {DUMUX: DUNE for multi-{phase, component, scale, physics, ...} flow and transport in porous media}, url = {http://www.sciencedirect.com/science/article/pii/S030917081100056X}, volume = 34, year = 2011 }
  Link
  http://www.sciencedirect.com/science/article/pii/S030917081100056X
2. Oladyshkin, S., Class, H., Helmig, R., & Nowak, W. (2011). A concept for data-driven uncertainty quantification and its application to carbon dioxide storage in geological formations. Advances in Water Resources, 34. https://doi.org/10.1016/j.advwatres.2011.08.005
  - BibTeX
  BibTeX
  @article{NULL, author = {Oladyshkin, Sergey and Class, Holger and Helmig, Rainer and Nowak, Wolfgang}, doi = {10.1016/j.advwatres.2011.08.005}, journal = {Advances in Water Resources}, month = {00}, note = {, IWS2ID=2559 }, page = {1508-1518}, title = {A concept for data-driven uncertainty quantification and its application to carbon dioxide storage in geological formations}, volume = 34, year = 2011 }
3. Lauser, A., Hager, C., Helmig, R., & Wohlmuth, B. I. (2011). A new approach for phase transitions in miscible multi-phase flow in porous media. Advances in Water Resources, 34, Article 8. https://doi.org/10.1016, j.advwaters.2011.04.021
  - BibTeX
  BibTeX
  @article{NULL, author = {Lauser, Andreas and Hager, Corinna and Helmig, Rainer and Wohlmuth, Barbara I.}, doi = {10.1016, j.advwaters.2011.04.021}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2530 , Partnerinstitution: Institut für Angewandte Analysis und Numerische Simulation , Partneraddress: Universität Stuttgart }, number = 8, page = {957-966}, title = {A new approach for phase transitions in miscible multi-phase flow in porous media}, volume = 34, year = 2011 }
4. Schäfer, F., Walter, L., Class, H., & Müller, C. (2011). The regional pressure impact of CO2 storage: a showcase study from the North German Basin. Environmental Earth Sciences. https://doi.org/10.1007/s12665-011-1184-8
  - BibTeX
  BibTeX
  @article{NULL, author = {Schäfer, Frauke and Walter, Lena and Class, Holger and Müller, Christian}, doi = {10.1007/s12665-011-1184-8}, journal = {Environmental Earth Sciences}, month = {12}, note = {, IWS2ID=2649 , Institution: Bundesanstalt für Geowissenschaften und Rohstoffe (BGR) , Address: Hannover }, title = {The regional pressure impact of CO2 storage: a showcase study from the North German Basin}, year = 2011 }
5. Cao, Y., Helmig, R., & Wohlmuth, B. I. (2011). A two-scale operator-splitting method for two-phase flow in porous media. Advances in Water Resources, 34, Article 12. https://doi.org/10.1016/j.advwatres.2011.07.002
  - BibTeX
  BibTeX
  @article{NULL, author = {Cao, Yufei and Helmig, Rainer and Wohlmuth, Barbara I.}, doi = {10.1016/j.advwatres.2011.07.002}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2632 , Partnerinstitution: Lehrstuhl für Numerische Mathematik }, number = 12, page = {1581-1596}, title = {A two-scale operator-splitting method for two-phase flow in porous media}, volume = 34, year = 2011 }
6. Szymkiewicz, A., Helmig, R., & Neuweiler, I. (2011). Upscaling unsaturated flow in binary porous media with air entry pressure effects. Water Resources Research, 48. https://doi.org/10.1029/2011WR010893
  - BibTeX
  BibTeX
  @article{NULL, author = {Szymkiewicz, Adam and Helmig, Rainer and Neuweiler, Insa}, doi = {10.1029/2011WR010893}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2642 }, title = {Upscaling unsaturated flow in binary porous media with air entry pressure effects}, volume = 48, year = 2011 }
7. Fritz, J., Flemisch, B., & Helmig, R. (2011). Decoupled and multiphysics models for non-isothermal compositional two-phase flow in porous media. International Journal of Numerical Analysis & Modeling, 9, Article 1. https://www.math.ualberta.ca/ijnam/Volume-9-2012/No-1-12/2012-01-02.pdf
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Fritz, Jochen and Flemisch, Bernd and Helmig, Rainer}, journal = {International Journal of Numerical Analysis & Modeling}, month = {12}, note = {, IWS2ID=2484 }, number = 1, page = {17-28}, title = {Decoupled and multiphysics models for non-isothermal compositional two-phase flow in porous media}, url = {https://www.math.ualberta.ca/ijnam/Volume-9-2012/No-1-12/2012-01-02.pdf}, volume = 9, year = 2011 }
  Link
  https://www.math.ualberta.ca/ijnam/Volume-9-2012/No-1-12/2012-01-02.pdf
8. Oladyshkin, S., Class, H., Helmig, R., & Nowak, W. (2011). An integrative approach to robust design and probabilistic risk assessment for CO2 storage in geological formations. Computational Geosciences, 15, Article 3. https://doi.org/10.1007/s10596-011-9224-8
  - BibTeX
  BibTeX
  @article{NULL, author = {Oladyshkin, Sergey and Class, Holger and Helmig, Rainer and Nowak, Wolfgang}, doi = {10.1007/s10596-011-9224-8}, journal = {Computational Geosciences}, month = {12}, note = {, IWS2ID=2503 }, number = 3, page = {565-577}, title = {An integrative approach to robust design and probabilistic risk assessment for CO2 storage in geological formations}, volume = 15, year = 2011 }
9. Cirpka, O. A., de Barros, F. P. J., Chiogna, G., & Nowak, W. (2011). Probability Density Function of Steady-State Concentration in Two-Dimensional Heterogeneous Porous Media. Water Resources Research, 47, Article W11523. https://doi.org/10.1029/2011WR010750
  - BibTeX
  BibTeX
  @article{NULL, author = {Cirpka, Olaf Arie and de Barros, Felipe P. J. and Chiogna, G. and Nowak, Wolfgang}, doi = {10.1029/2011WR010750}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2615 , Partnerinstitution: Universität Tübingen }, number = {W11523}, title = {Probability Density Function of Steady-State Concentration in Two-Dimensional Heterogeneous Porous Media}, volume = 47, year = 2011 }
10. Neuweiler, I., Papafotiou, A., Class, H., & Helmig, R. (2011). Estimation of effective parameters for a two-phase flow problem in non-Gaussian heterogeneous porous media. Journal of Contaminant Hydrology, 120-121, Article 1. https://doi.org/10.1016/j.jconhyd.2010.08.001
  - BibTeX
  BibTeX
  @article{NULL, author = {Neuweiler, Insa and Papafotiou, Alexandros and Class, Holger and Helmig, Rainer}, doi = {10.1016/j.jconhyd.2010.08.001}, journal = {Journal of Contaminant Hydrology}, month = {07}, note = {, IWS2ID=2544 , Partnerinstitution: Institut für Strömungsmechanik und Umweltphysik im Bauwesen, Universität Hannover , Partneraddress: Hannover }, number = 1, page = {141-156}, title = {Estimation of effective parameters for a two-phase flow problem in non-Gaussian heterogeneous porous media}, volume = {120-121}, year = 2011 }
11. Tatomir, A., Szymkiewicz, A., Class, H., & Helmig, R. (2011). Modeling two phase flow in large scale fractured porous media with an extended multiple interacting continua method. Computer Modeling in Engineering & Sciences.
  - BibTeX
  BibTeX
  @article{NULL, author = {Tatomir, Alexandru and Szymkiewicz, Adam and Class, Holger and Helmig, Rainer}, journal = {Computer Modeling in Engineering & Sciences}, month = {12}, note = {accepted, IWS2ID=2659 , Partnerinstitution: Gdansk University of Technology }, title = {Modeling two phase flow in large scale fractured porous media with an extended multiple interacting continua method}, year = 2011 }
12. Ahrenholz, B., Niessner, J., Helmig, R., & Krafczyk, M. (2011). Pore-scale determination of parameters for macro-scale modeling of evaporation processes in porous media. Water Resources Research, 47. https://doi.org/10.1029/2010WR009519
  - BibTeX
  BibTeX
  @article{NULL, author = {Ahrenholz, Benjamin and Niessner, Jennifer and Helmig, Rainer and Krafczyk, Manfred}, doi = {10.1029/2010WR009519}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2500 , Partnerinstitution: Institut für rechnergestützte Modellierung im Bauingenieurwesen , Partneraddress: Technische Universität Braunschweig }, title = {Pore-scale determination of parameters for macro-scale modeling of evaporation processes in porous media}, volume = 47, year = 2011 }
13. Cao, Y., Helmig, R., & Wohlmuth, B. I. (2011). Convergence of the multipoint flux approximation L-method for homogeneous media on uniform grids. Numerical Methods for Partial Differential Equations, 27, Article 2. https://doi.org/10.1002/num.20525
  - BibTeX
  BibTeX
  @article{NULL, author = {Cao, Yufei and Helmig, Rainer and Wohlmuth, Barbara I.}, doi = {10.1002/num.20525}, journal = {Numerical Methods for Partial Differential Equations}, month = {12}, note = {, IWS2ID=2502 , Partnerinstitution: Institut für Angewandte Analysis und Numerische Simulation , Partneraddress: Universität Stuttgart }, number = 2, page = {329-350}, title = {Convergence of the multipoint flux approximation L-method for homogeneous media on uniform grids}, volume = 27, year = 2011 }
14. Oladyshkin, S., & Panfilov, M. (2011). Hydrogen penetration in water through porous medium: application to a radioactive waste storage site. Environmental Earth Sciences, 64, Article 4. https://doi.org/10.1007/s12665-011-0916-0
  - BibTeX
  BibTeX
  @article{NULL, author = {Oladyshkin, Sergey and Panfilov, Mikhail}, doi = {10.1007/s12665-011-0916-0}, journal = {Environmental Earth Sciences}, month = {12}, note = {, IWS2ID=2573 }, number = 4, page = {989-999}, title = {Hydrogen penetration in water through porous medium: application to a radioactive waste storage site}, volume = 64, year = 2011 }
15. Szymkiewicz, A., & Helmig, R. (2011). Comparison of conductivity averaging methods for one-dimensional unsaturated flow in layered soils. Advances in Water Resources, 34, Article 8. https://doi.org/10.1016/j.advwatres.2011.05.011
  - BibTeX
  BibTeX
  @article{NULL, author = {Szymkiewicz, Adam and Helmig, Rainer}, doi = {10.1016/j.advwatres.2011.05.011}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2617 , Partnerinstitution: Gdansk University of Technology , Partneraddress: Gdansk }, number = 8, page = {1012-1025}, title = {Comparison of conductivity averaging methods for one-dimensional unsaturated flow in layered soils}, volume = 34, year = 2011 }
16. de Barros, F. P. J., Bolster, D., Sanchez-Vila, X., & Nowak, W. (2011). A Divide and Conquer Approach to Cope with Uncertainties, Human Health Risk and Decision Making in Contaminant Hydrology. Water Resources Research, 47, Article W05508. https://doi.org/10.1029/2010WR009954
  - BibTeX
  BibTeX
  @article{NULL, author = {de Barros, Felipe P. J. and Bolster, Diogo and Sanchez-Vila, Xavier and Nowak, Wolfgang}, doi = {10.1029/2010WR009954}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2551 }, number = {W05508}, title = {A Divide and Conquer Approach to Cope with Uncertainties, Human Health Risk and Decision Making in Contaminant Hydrology}, volume = 47, year = 2011 }
17. Darcis, M., Class, H., Flemisch, B., & Helmig, R. (2011). Sequential model coupling for feasibility studies of CO2 storage in deep saline aquifers. Oil & Gas Science and Technology-Revue de l’IFP, 66, Article 1. https://doi.org/10.2516/ogst/2010037
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Darcis, Melanie and Class, Holger and Flemisch, Bernd and Helmig, Rainer}, doi = {10.2516/ogst/2010037}, journal = {Oil & Gas Science and Technology-Revue de l'IFP}, month = {12}, note = {, IWS2ID=2558 }, number = 1, page = {93-103}, title = {Sequential model coupling for feasibility studies of CO2 storage in deep saline aquifers}, url = {http://ogst.ifpenergiesnouvelles.fr/index.php?option=com_article&access=doi&doi=10.2516/ogst/2010037&Itemid=129}, volume = 66, year = 2011 }
  Link
  http://ogst.ifpenergiesnouvelles.fr/index.php?option=com_article&access=doi&doi=10.2516/ogst/2010037&Itemid=129
18. Heiss, V., Neuweiler, I., Ochs, S. O., & Färber, A. (2011). Experimental investigation on front morphology for two-phase flow in heterogeneous porous media. Water Resources Research, Article W10528. https://doi.org/10.1029/2011WR010612
  - BibTeX
  BibTeX
  @article{NULL, author = {Heiss, Veronica and Neuweiler, Insa and Ochs, Steffen Oliver and Färber, Arne}, doi = {10.1029/2011WR010612}, journal = {Water Resources Research}, month = {10}, note = {, IWS2ID=2335 }, number = {W10528}, title = {Experimental investigation on front morphology for two-phase flow in heterogeneous porous media}, year = 2011 }
19. Niessner, J., Berg, S., & Hassanizadeh, S. M. (2011). Comparison of two-phase Darcy’s law with a thermodynamically consistent approach. Transport in Porous Media.
  - BibTeX
  BibTeX
  @article{NULL, author = {Niessner, Jennifer and Berg, Steffen and Hassanizadeh, S. Majid}, journal = {Transport in Porous Media}, month = {12}, note = {accepted, IWS2ID=2576 }, title = {Comparison of two-phase Darcy's law with a thermodynamically consistent approach}, year = 2011 }
20. Mosthaf, K., Baber, K., Flemisch, B., Helmig, R., Leijnse, T., Rybak, I., & Wohlmuth, B. I. (2011). A coupling concept for two-phase compositional porous-medium and single-phase compositional free flow. Water Resources Research, 47. https://onlinelibrary.wiley.com/doi/10.1029/2011WR010685/abstract
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Mosthaf, Klaus and Baber, Katherina and Flemisch, Bernd and Helmig, Rainer and Leijnse, Toon and Rybak, Iryna and Wohlmuth, Barbara I.}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2589 }, page = {W10522}, title = {A coupling concept for two-phase compositional porous-medium and single-phase compositional free flow}, url = {https://onlinelibrary.wiley.com/doi/10.1029/2011WR010685/abstract}, volume = 47, year = 2011 }
  Link
  https://onlinelibrary.wiley.com/doi/10.1029/2011WR010685/abstract
21. Hlawatsch, M., Leube, P., Nowak, W., & Weiskopf, D. (2011). Flow Radar Glyphs - Static Visualization of Unsteady Flow with Uncertainty. IEEE Transactions on Visualization and Computer Graphics, 17, Article 12. https://doi.org/10.1109/TVCG.2011.203
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  BibTeX
  @article{NULL, author = {Hlawatsch, Marcel and Leube, Philipp and Nowak, Wolfgang and Weiskopf, Daniel}, doi = {10.1109/TVCG.2011.203}, journal = {IEEE Transactions on Visualization and Computer Graphics}, month = {12}, note = {, IWS2ID=2656 , Partnerinstitution: Institut für Visualisierung und Interaktive Systeme , Partneraddress: Stuttgart }, number = 12, page = {1949-1958}, title = {Flow Radar Glyphs - Static Visualization of Unsteady Flow with Uncertainty}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2011/FlowRadarGlyphs_small.pdf}, volume = 17, year = 2011 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2011/FlowRadarGlyphs_small.pdf
22. Walter, L., Oladyshkin, S., Class, H., Darcis, M., & Helmig, R. (2011). A study on pressure evolution in a sand channel system during CO2 injection. Energy Procedia, 4.
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  BibTeX
  @article{NULL, author = {Walter, Lena and Oladyshkin, Sergey and Class, Holger and Darcis, Melanie and Helmig, Rainer}, journal = {Energy Procedia}, month = {06}, note = {, IWS2ID=2875 }, page = {3722-3729}, title = {A study on pressure evolution in a sand channel system during CO2 injection}, volume = 4, year = 2011 }
23. Szymkiewicz, A., Helmig, R., & Kuhnke, H. (2011). Two phase flow in heterogeneous porous media with non-wetting phase trapping. Transport in Porous Media, 86, Article 1. https://doi.org/10.1007/s11242-010-9604-x
  - BibTeX
  BibTeX
  @article{NULL, author = {Szymkiewicz, Adam and Helmig, Rainer and Kuhnke, Hartmut}, doi = {10.1007/s11242-010-9604-x}, journal = {Transport in Porous Media}, month = {05}, note = {, IWS2ID=2521 , Partnerinstitution: Gdansk University of Technology }, number = 1, page = {27-47}, title = {Two phase flow in heterogeneous porous media with non-wetting phase trapping}, volume = 86, year = 2011 }
24. Cirpka, O. A., de Barros, F. P. J., Chiogna, G., Rolle, M., & Nowak, W. (2011). Stochastic Flux-Related Analysis of Transverse Mixing in Two-Dimensional Heterogeneous Porous Media. Water Resources Research, 47, Article W06515. https://doi.org/10.1029/2010WR010279
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Cirpka, Olaf Arie and de Barros, Felipe P. J. and Chiogna, G. and Rolle, M. and Nowak, Wolfgang}, doi = {10.1029/2010WR010279}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2582 , Partnerinstitution: Universität Tübingen }, number = {W06515}, title = {Stochastic Flux-Related Analysis of Transverse Mixing in Two-Dimensional Heterogeneous Porous Media}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/papers/2011/Cirpka_al_2011WRR_Mixing_Enhancement.pdf}, volume = 47, year = 2011 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/papers/2011/Cirpka_al_2011WRR_Mixing_Enhancement.pdf
25. Schmid, K. S., Geiger, S., & Sorbie, K. S. (2011). Semianalytical solutions for cocurrent and countercurrent imbibitionand dispersion of solutes in immiscible two-phase flow. Water Resources Research, 47. https://doi.org/10.1029/2010WR009686
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Schmid, Karen Sophie and Geiger, Sebastian and Sorbie, Ken Stuart}, doi = {10.1029/2010WR009686}, journal = {Water Resources Research}, month = {01}, note = {, IWS2ID=2733 }, page = {01--16}, title = {Semianalytical solutions for cocurrent and countercurrent imbibitionand dispersion of solutes in immiscible two-phase flow}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2012/final_schmid_etal2010_wrr.pdf}, volume = 47, year = 2011 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2012/final_schmid_etal2010_wrr.pdf
2010
1. Nowak, W., de Barros, F. P. J., & Rubin, Y. (2010). Bayesian Geostatistical Design: Task-driven optimal Site Investigation When the Geostatistical Model is Uncertain. Water Resources Research, 46, Article W03535. https://doi.org/10.1029/2009WR008312
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  BibTeX
  @article{NULL, author = {Nowak, Wolfgang and de Barros, Felipe P. J. and Rubin, Yoram}, doi = {10.1029/2009WR008312}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2373 }, number = {W03535}, title = {Bayesian Geostatistical Design: Task-driven optimal Site Investigation When the Geostatistical Model is Uncertain}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Nowak_deBarros_Rubin_WRR2009_FINAL VERSION.pdf}, volume = 46, year = 2010 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Nowak_deBarros_Rubin_WRR2009_FINAL VERSION.pdf
2. de Barros, F. P. J., & Nowak, W. (2010). On the Link Between Contaminant Source Release Conditions and Plume Prediction Uncertainty. Journal of Contaminant Hydrology, 116. https://doi.org/10.1016/j.jconhyd.2010.05.004
  - BibTeX
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  BibTeX
  @article{NULL, author = {de Barros, Felipe P. J. and Nowak, Wolfgang}, doi = {10.1016/j.jconhyd.2010.05.004}, journal = {Journal of Contaminant Hydrology}, month = {12}, note = {, IWS2ID=2517 }, page = {24-34}, title = {On the Link Between Contaminant Source Release Conditions and Plume Prediction Uncertainty}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/deBarros_Nowak_2010JCH_Source_Width_Public.pdf}, volume = 116, year = 2010 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/deBarros_Nowak_2010JCH_Source_Width_Public.pdf
3. van Noorden, T. L., Pop, I. S., Ebigbo, A., & Helmig, R. (2010). An upscaled model for biofilm growth in a thin strip. Water Resources Research, 46. https://doi.org/10.1029/2009WR008217
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  BibTeX
  @article{NULL, author = {van Noorden, Tycho L. and Pop, Iuliu Sorin and Ebigbo, Anozie and Helmig, Rainer}, doi = {10.1029/2009WR008217}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2492 }, page = {W06505}, title = {An upscaled model for biofilm growth in a thin strip}, volume = 46, year = 2010 }
4. Flemisch, B., Kaltenbacher, M., Triebenbacher, S., & Wohlmuth, B. I. (2010). The equivalence of standard and mixed finite element methods in applications to elasto-acoustic interaction. SIAM Journal on Scientific Computing, 32, Article 4. https://epubs.siam.org/doi/abs/10.1137/090758507
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Flemisch, Bernd and Kaltenbacher, Manfred and Triebenbacher, Simon and Wohlmuth, Barbara I.}, journal = {SIAM Journal on Scientific Computing}, month = {12}, note = {, IWS2ID=2480 }, number = 4, page = {1980-2006}, title = {The equivalence of standard and mixed finite element methods in applications to elasto-acoustic interaction}, url = {https://epubs.siam.org/doi/abs/10.1137/090758507}, volume = 32, year = 2010 }
  Link
  https://epubs.siam.org/doi/abs/10.1137/090758507
5. Papafotiou, A., Sheta, H., & Helmig, R. (2010). Numerical modeling of two-phase hysteresis combined with an interface condition for heterogeneous porous media. Computational Geosciences, 14, Article 2. https://doi.org/10.1007/s10596-009-9151-0
  - BibTeX
  BibTeX
  @article{NULL, author = {Papafotiou, Alexandros and Sheta, Hussam and Helmig, Rainer}, doi = {10.1007/s10596-009-9151-0}, journal = {Computational Geosciences}, month = {12}, note = {, IWS2ID=2471 , Partnerinstitution: Institut für Strömungsmechanik und Umweltphysik im Bauwesen, Universität Hannover , Partneraddress: Hannover }, number = 2, page = {273-287}, title = {Numerical modeling of two-phase hysteresis combined with an interface condition for heterogeneous porous media}, volume = 14, year = 2010 }
6. Triebenbacher, S., Kaltenbacher, M., Wohlmuth, B. I., & Flemisch, B. (2010). Applications of the Mortar Finite Element Method in Vibroacoustics and Flow Induced Noise Computations. Acustica, 96. https://www.ingentaconnect.com/content/dav/aaua/2010/00000096/00000003/art00013
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Triebenbacher, Simon and Kaltenbacher, Manfred and Wohlmuth, Barbara I. and Flemisch, Bernd}, journal = {Acustica}, month = {12}, note = {, IWS2ID=2543 }, page = {536-553}, title = {Applications of the Mortar Finite Element Method in Vibroacoustics and Flow Induced Noise Computations}, url = {https://www.ingentaconnect.com/content/dav/aaua/2010/00000096/00000003/art00013}, volume = 96, year = 2010 }
  Link
  https://www.ingentaconnect.com/content/dav/aaua/2010/00000096/00000003/art00013
7. Kopp, A., Binning, P. J., Johannsen, K., Helmig, R., & Class, H. (2010). A contribution to risk analysis for leakage through abandoned wells in geological CO2 storage. Advances in Water Resources, 33, Article 8. https://doi.org/10.1016/j.advwatres.2010.05.001
  - BibTeX
  BibTeX
  @article{NULL, author = {Kopp, Andreas and Binning, Philip J. and Johannsen, Klaus and Helmig, Rainer and Class, Holger}, doi = {10.1016/j.advwatres.2010.05.001}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2437 }, number = 8, page = {867-879}, title = {A contribution to risk analysis for leakage through abandoned wells in geological CO2 storage}, volume = 33, year = 2010 }
8. Ochs, S. O., Class, H., Färber, A., & Helmig, R. (2010). Methods for predicting the spreading of steam below the water table during subsurface remediation. Water Resources Research, 46. https://doi.org/10.1029/2007WR006401
  - BibTeX
  BibTeX
  @article{NULL, author = {Ochs, Steffen Oliver and Class, Holger and Färber, Arne and Helmig, Rainer}, doi = {10.1029/2007WR006401}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2501 }, page = {W05520}, title = {Methods for predicting the spreading of steam below the water table during subsurface remediation}, volume = 46, year = 2010 }
9. Skjælaaen, I., Ebigbo, A., Espedal, M., & Helmig, R. (2010). A model for transport of hydrogen sulfide in oil- and water-saturated porous media. Computing and Visualization in Science, 13, Article 6. https://doi.org/10.1007/s00791-010-0143-3
  - BibTeX
  BibTeX
  @article{NULL, author = {Skjælaaen, Inge and Ebigbo, Anozie and Espedal, Magne and Helmig, Rainer}, doi = {10.1007/s00791-010-0143-3}, journal = {Computing and Visualization in Science}, month = {12}, note = {, IWS2ID=2548 }, number = 6, page = {265-273}, title = {A model for transport of hydrogen sulfide in oil- and water-saturated porous media}, volume = 13, year = 2010 }
10. Nuske, P., Faigle, B., Helmig, R., Niessner, J., & Neuweiler, I. (2010). Modeling gas-water processes in fractures with fracture flow properties obtained through upscaling. Water Resources Research, 46. https://doi.org/10.1029/2009WR008076
  - BibTeX
  BibTeX
  @article{NULL, author = {Nuske, Philipp and Faigle, Benjamin and Helmig, Rainer and Niessner, Jennifer and Neuweiler, Insa}, doi = {10.1029/2009WR008076}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2554 , Partnerinstitution: Institut für Strömungsmechanik und Umweltphysik im Bauwesen, Universität Hannover }, page = {W09528}, title = {Modeling gas-water processes in fractures with fracture flow properties obtained through upscaling}, volume = 46, year = 2010 }
11. Kempka, T., Kühn, M., Class, H., Frykman, P., Kopp, A., Nielsen, C. M., & Probst, P. (2010). Modelling of CO2 arrival time at Ketzin - Part I. International Journal of Greenhouse Gas Control, 4. https://doi.org/10.1016/j.ijggc.2010.07.005
  - BibTeX
  BibTeX
  @article{NULL, author = {Kempka, Thomas and Kühn, Michael and Class, Holger and Frykman, Peter and Kopp, Andreas and Nielsen, C.M. and Probst, Peter}, doi = {10.1016/j.ijggc.2010.07.005}, journal = {International Journal of Greenhouse Gas Control}, month = {12}, note = {, IWS2ID=3075 }, page = {1007-1015}, title = {Modelling of CO2 arrival time at Ketzin - Part I}, volume = 4, year = 2010 }
12. Troldborg, M., Nowak, W., Tuxen, N., Bjerg, P. L., Helmig, R., & Binning, P. J. (2010). Uncertainty evaluation of mass discharge estimates from a contaminated site using a fully Bayesian framework. Water Resources Research, 46, Article W12552. https://doi.org/10.1029/2010WR009227
  - BibTeX
  BibTeX
  @article{NULL, author = {Troldborg, Mads and Nowak, Wolfgang and Tuxen, Nina and Bjerg, Poul L. and Helmig, Rainer and Binning, Philip J.}, doi = {10.1029/2010WR009227}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2549 , Partnerinstitution: Dept. of Environmental Engineering, TU Denmark, 2800 Kgs. Lyngby; Orbicon A/S, Roskilde , Partneraddress: Denmark }, number = {W12552}, title = {Uncertainty evaluation of mass discharge estimates from a contaminated site using a fully Bayesian framework}, volume = 46, year = 2010 }
13. Nowak, W. (2010). Measures of Parameter Uncertainty in Geostatistical Estimation and Geostatistical Optimal Design. Mathematical Geosciences, 42, Article 2. https://doi.org/10.1007/s11004-009-9245-1
  - BibTeX
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  BibTeX
  @article{NULL, author = {Nowak, Wolfgang}, doi = {10.1007/s11004-009-9245-1}, journal = {Mathematical Geosciences}, month = {12}, note = {, IWS2ID=2371 }, number = 2, page = {199-221}, title = {Measures of Parameter Uncertainty in Geostatistical Estimation and Geostatistical Optimal Design}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Nowak_2009MG_Scalar_Measures_Optimal_Design.pdf}, volume = 42, year = 2010 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Nowak_2009MG_Scalar_Measures_Optimal_Design.pdf
14. Ebigbo, A., Helmig, R., Cunningham, A. B., Class, H., & Gerlach, R. (2010). Modelling biofilm growth in the presence of carbon dioxide and water flow in the subsurface. Advances in Water Resources, 33, Article 7. https://doi.org/10.1016/j.advwatres.2010.04.004
  - BibTeX
  BibTeX
  @article{NULL, author = {Ebigbo, Anozie and Helmig, Rainer and Cunningham, Alfred B. and Class, Holger and Gerlach, Robin}, doi = {10.1016/j.advwatres.2010.04.004}, journal = {Advances in Water Resources}, month = {00}, note = {, IWS2ID=2520 }, number = 7, page = {762-781}, title = {Modelling biofilm growth in the presence of carbon dioxide and water flow in the subsurface}, volume = 33, year = 2010 }
2009
1. Niessner, J., & Hassanizadeh, S. M. (2009). Modeling kinetic interphase mass transfer for two-phase flow in porous media including fluid - fluid interfacial area. Transport in Porous Media. https://doi.org/10.1007/s11242-009-9
  - BibTeX
  BibTeX
  @article{NULL, author = {Niessner, Jennifer and Hassanizadeh, S. Majid}, doi = {10.1007/s11242-009-9}, journal = {Transport in Porous Media}, month = {12}, note = {, IWS2ID=2309 }, title = {Modeling kinetic interphase mass transfer for two-phase flow in porous media including fluid - fluid interfacial area}, year = 2009 }
2. Ernst, R., Flemisch, B., & Wohlmuth, B. I. (2009). A multiplicative Schwarz method and its application to nonlinear acoustic-structure interaction. Mathematical Modelling and Numerical Analysis, Article 43. https://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8194552&fileId=S0764583X09000107
  - BibTeX
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  BibTeX
  @article{NULL, author = {Ernst, Roland and Flemisch, Bernd and Wohlmuth, Barbara I.}, journal = {Mathematical Modelling and Numerical Analysis}, month = {12}, note = {, IWS2ID=2362 }, number = 43, page = {487-506}, title = {A multiplicative Schwarz method and its application to nonlinear acoustic-structure interaction}, url = {https://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8194552&fileId=S0764583X09000107}, year = 2009 }
  Link
  https://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8194552&fileId=S0764583X09000107
3. Niessner, J., & Hassanizadeh, S. M. (2009). Non-equilibrium interphase heat and mass transfer during two-phase flow in porous media-theoretical considerations and modeling. Advances in Water Resources, 32.
  - BibTeX
  BibTeX
  @article{NULL, author = {Niessner, Jennifer and Hassanizadeh, S. Majid}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2443 }, page = {1756-1766}, title = {Non-equilibrium interphase heat and mass transfer during two-phase flow in porous media-theoretical considerations and modeling}, volume = 32, year = 2009 }
4. Helmig, R., Weiss, A., & Wohlmuth, B. I. (2009). Variational inequalities for modeling flow in heterogeneous porous media with entry pressure. Computational Geosciences, 13, Article 3. https://doi.org/10.1007/s10596-008-9125-7
  - BibTeX
  BibTeX
  @article{NULL, author = {Helmig, Rainer and Weiss, Alexander and Wohlmuth, Barbara I.}, doi = {10.1007/s10596-008-9125-7}, journal = {Computational Geosciences}, month = {12}, note = {, IWS2ID=2450 , Partnerinstitution: Institut für Angewandte Analysis und Numerische Simulation , Partneraddress: Universität Stuttgart }, number = 3, page = {373-389}, title = {Variational inequalities for modeling flow in heterogeneous porous media with entry pressure}, volume = 13, year = 2009 }
5. Kurz, S., Auchmann, B., & Flemisch, B. (2009). Dimensional reduction of field problems in a differential-forms framework. Compel, 28, Article 4. https://www.emeraldinsight.com/doi/abs/10.1108/03321640910959008
  - BibTeX
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  BibTeX
  @article{NULL, author = {Kurz, Stefan and Auchmann, Bernhard and Flemisch, Bernd}, journal = {COMPEL}, month = {12}, note = {, IWS2ID=2481 }, number = 4, page = {907-921}, title = {Dimensional reduction of field problems in a differential-forms framework}, url = {https://www.emeraldinsight.com/doi/abs/10.1108/03321640910959008}, volume = 28, year = 2009 }
  Link
  https://www.emeraldinsight.com/doi/abs/10.1108/03321640910959008
6. Darcis, M., Class, H., & Flemisch, B. (2009). Coupling Models of Different Complexity for the Simulation of CO2 Storage in Saline Aquifers. Energy Procedia, 1. https://www.sciencedirect.com/science/article/pii/S187661020900232X
  - BibTeX
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  BibTeX
  @article{NULL, author = {Darcis, Melanie and Class, Holger and Flemisch, Bernd}, journal = {Energy Procedia}, month = {01}, note = {, IWS2ID=2454 }, page = {1767-1774}, title = {Coupling Models of Different Complexity for the Simulation of CO2 Storage in Saline Aquifers}, url = {https://www.sciencedirect.com/science/article/pii/S187661020900232X}, volume = 1, year = 2009 }
  Link
  https://www.sciencedirect.com/science/article/pii/S187661020900232X
7. Class, H., Ebigbo, A., Helmig, R., Dahle, H. K., Nordbotten, J. M., Celia, M. A., Audigane, P., Darcis, M., Ennis-King, J., Fan, Y., Flemisch, B., Gasda, S. E., Jin, M., Krug, S., Labregere, D., Naderi Beni, A., Pawar, R. J., Sbai, A., Thomas, S. G., et al. (2009). A benchmark study on problems related to CO2 storage in geologic formations: Summary and discussion of the results. Computational Geosciences, 13, Article 4. https://doi.org/10.1007/s10596-009-9146-x
  - BibTeX
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  BibTeX
  @article{NULL, author = {Class, Holger and Ebigbo, Anozie and Helmig, Rainer and Dahle, Helge K. and Nordbotten, Jan M. and Celia, Michael A. and Audigane, Pascal and Darcis, Melanie and Ennis-King, Jonathan and Fan, Yaqing and Flemisch, Bernd and Gasda, Sarah E. and Jin, Min and Krug, Stefanie and Labregere, Diane and Naderi Beni, Ali and Pawar, Rajesh J. and Sbai, Adil and Thomas, Sunil G. and Trenty, Laurent and Wei, Lingli}, doi = {10.1007/s10596-009-9146-x}, journal = {Computational Geosciences}, month = {12}, note = {, IWS2ID=2473 }, number = 4, page = {409-434}, title = {A benchmark study on problems related to CO2 storage in geologic formations: Summary and discussion of the results}, url = {https://link.springer.com/article/10.1007%2Fs10596-009-9146-x?LI=true}, volume = 13, year = 2009 }
  Link
  https://link.springer.com/article/10.1007%2Fs10596-009-9146-x?LI=true
8. Sudharsan, N. M., Jambhekar, V. A., & Babu, V. (2009). A validation study of OpenFOAM using the supersonic flow in a mixed compression intake. Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 224(6). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2012/JAER0651_Final_Accepted.pdf
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Sudharsan, N. M. and Jambhekar, Vishal Arun and Babu, V.}, journal = {Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering}, month = {11}, note = {, IWS2ID=2712 }, page = {673-679}, title = {A validation study of OpenFOAM using the supersonic flow in a mixed compression intake}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2012/JAER0651_Final_Accepted.pdf}, volume = {224(6)}, year = 2009 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2012/JAER0651_Final_Accepted.pdf
9. Kopp, A., Ebigbo, A., Bielinski, A., Class, H., & Helmig, R. (2009). Numerical simulation of temperature changes caused by CO2 injection in geological reservoirs. Carbon Dioxide Sequestration in Geological Media - State of the Science, Article 59.
  - BibTeX
  BibTeX
  @article{NULL, author = {Kopp, Andreas and Ebigbo, Anozie and Bielinski, Andreas and Class, Holger and Helmig, Rainer}, booktitle = {Carbon dioxide sequestration in geological media - State of the science}, editor = {Grobe, M. and Pashin, J. C. and Dodge, R. L.}, month = {12}, note = {, IWS2ID=2101 , Address: Edmonton, USA }, number = 59, page = {439-456}, title = {Numerical simulation of temperature changes caused by CO2 injection in geological reservoirs}, year = 2009 }
10. Kopp, A., Class, H., & Helmig, R. (2009). Investigations on CO2 storage capacity in saline aquifers - Part 1: Dimensional analysis of flow processes and reservoir characteristics. International Journal of Greenhouse Gas Control, 3, Article 3. https://doi.org/10.1016/j.ijggc.2008.10.002
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Kopp, Andreas and Class, Holger and Helmig, Rainer}, doi = {10.1016/j.ijggc.2008.10.002}, journal = {International Journal of Greenhouse Gas Control}, month = {12}, note = {, IWS2ID=2384 }, number = 3, page = {263-276}, title = {Investigations on CO2 storage capacity in saline aquifers - Part 1: Dimensional analysis of flow processes and reservoir characteristics}, url = {http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B83WP-4V1MFNV-1-R&_cdi=33792&_user=479010&_orig=search&_coverDate=05%2F31%2F2009&_sk=999969996&view=c&wchp=dGLzVlz-zSkWz&md5=0b150c61434f46d53f6ce05466fa9d31&ie=/sdarticle.pdf}, volume = 3, year = 2009 }
  Link
  http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B83WP-4V1MFNV-1-R&_cdi=33792&_user=479010&_orig=search&_coverDate=05%2F31%2F2009&_sk=999969996&view=c&wchp=dGLzVlz-zSkWz&md5=0b150c61434f46d53f6ce05466fa9d31&ie=/sdarticle.pdf
11. Geiger, S., Matthäi, S., Niessner, J., & Helmig, R. (2009). Black-oil simulations for three-component - three-phase flow in fractured porous media. SPE Journal, 14, Article 2. https://doi.org/10.2118/107485-PA
  - BibTeX
  BibTeX
  @article{NULL, author = {Geiger, Sebastian and Matthäi, Stephan and Niessner, Jennifer and Helmig, Rainer}, doi = {10.2118/107485-PA}, journal = {SPE Journal}, month = {12}, note = {, IWS2ID=2112 }, number = 2, page = {338-354}, title = {Black-oil simulations for three-component - three-phase flow in fractured porous media}, volume = 14, year = 2009 }
12. Nowak, W. (2009). Best Unbiased Ensemble Linearization and the Quasi-Linear Kalman Ensemble Generator. Water Resources Research, 45, Article W04431. https://doi.org/10.1029/2008WR007328
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Nowak, Wolfgang}, doi = {10.1029/2008WR007328}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2372 }, number = {W04431}, title = {Best Unbiased Ensemble Linearization and the Quasi-Linear Kalman Ensemble Generator}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2008WR007328.pdf}, volume = 45, year = 2009 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2008WR007328.pdf
13. Kopp, A., Class, H., & Helmig, R. (2009). Investigations on CO2 storage capacity in saline aquifers - Part 2: Estimation of storage capacity coefficients. International Journal of Greenhouse Gas Control, 3, Article 3. https://doi.org/10.1016/j.ijggc.2008.10.001
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  - Link
  BibTeX
  @article{NULL, author = {Kopp, Andreas and Class, Holger and Helmig, Rainer}, doi = {10.1016/j.ijggc.2008.10.001}, journal = {International Journal of Greenhouse Gas Control}, month = {12}, note = {, IWS2ID=2385 }, number = 3, page = {277-287}, title = {Investigations on CO2 storage capacity in saline aquifers - Part 2: Estimation of storage capacity coefficients}, url = {http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B83WP-4V1D7WW-1-F&_cdi=33792&_user=479010&_orig=search&_coverDate=05%2F31%2F2009&_sk=999969996&view=c&wchp=dGLzVlz-zSkWz&md5=0fcbb46a64e634f1c9644b3a3078a21f&ie=/sdarticle.pdf}, volume = 3, year = 2009 }
  Link
  http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B83WP-4V1D7WW-1-F&_cdi=33792&_user=479010&_orig=search&_coverDate=05%2F31%2F2009&_sk=999969996&view=c&wchp=dGLzVlz-zSkWz&md5=0fcbb46a64e634f1c9644b3a3078a21f&ie=/sdarticle.pdf
14. Fritz, J., Nowak, W., & Neuweiler, I. (2009). Application of FFT-based Algorithms for Large-Scale Universal Kriging Problems. Mathematical Geosciences, Article 41. https://doi.org/10.1007/s11004-009-9220-x
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  BibTeX
  @article{NULL, author = {Fritz, Jochen and Nowak, Wolfgang and Neuweiler, Insa}, doi = {10.1007/s11004-009-9220-x}, journal = {Mathematical Geosciences}, month = {12}, note = {, IWS2ID=2346 }, number = 41, page = {509-533}, title = {Application of FFT-based Algorithms for Large-Scale Universal Kriging Problems}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/MATG188.pdf}, year = 2009 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/MATG188.pdf
15. Kopp, A., Probst, P., Class, H., Hurter, S., & Helmig, R. (2009). Estimation of CO2 storage capacity coefficients in geologic formations. Energy Procedia, 1, Article 1. https://doi.org/10.1016/j.egypro.2009.02.060
  - BibTeX
  BibTeX
  @article{NULL, author = {Kopp, Andreas and Probst, Peter and Class, Holger and Hurter, Suzanne and Helmig, Rainer}, doi = {10.1016/j.egypro.2009.02.060}, journal = {Energy Procedia}, month = {12}, note = {, IWS2ID=2451 }, number = 1, page = {2863-2870}, title = {Estimation of CO2 storage capacity coefficients in geologic formations}, volume = 1, year = 2009 }
16. Class, H., Dahle, H. K., & Helmig, R. (2009). Preface (to the Special Issue). Computational Geosciences, 13. https://doi.org/10.1007/s10596-009-9160-z
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  BibTeX
  @article{NULL, author = {Class, Holger and Dahle, Helge K. and Helmig, Rainer}, doi = {10.1007/s10596-009-9160-z}, journal = {Computational Geosciences}, month = {12}, note = {, IWS2ID=3077 }, page = {405-407}, title = {Preface (to the Special Issue)}, volume = 13, year = 2009 }
17. Freiboth, S., Class, H., Helmig, R., Graf, T., Ehlers, W., Schwarz, V., & Vrettos, C. (2009). A model for multiphase flow and transport in porous media including a phenomenological approach to account for deformation - a model concept and its validation within a code intercomparison study (No. 3). 13, Article 3. https://doi.org/10.1007/s10596-008-9118-6
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  BibTeX
  @article{Freiboth/etal, author = {Freiboth, Sandra and Class, Holger and Helmig, Rainer and Graf, Tobias and Ehlers, Wolfgang and Schwarz, Viktoria and Vrettos, Christos}, doi = {10.1007/s10596-008-9118-6}, month = {12}, note = {, IWS2ID=2224 , Partnerinstitution: Institut für Mechanik (Bauwesen) , Partneraddress: Universität Stuttgart }, number = 3, page = {281-300}, publisher = {Computational Geosciences}, title = {A model for multiphase flow and transport in porous media including a phenomenological approach to account for deformation - a model concept and its validation within a code intercomparison study}, volume = 13, year = 2009 }
18. Pop, I. S., van Duijn, C. J., Niessner, J., & Hassanizadeh, S. M. (2009). Horizontal redistribution of fluids in a porous medium: the role of interfacial area in modeling hysteresis. Advances in Water Resources, 32, Article 3. https://doi.org/10.1016/j.advwatres.2008.12.006
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  @article{NULL, author = {Pop, Iuliu Sorin and van Duijn, Cornelis Johannes and Niessner, Jennifer and Hassanizadeh, S. Majid}, doi = {10.1016/j.advwatres.2008.12.006}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2322 }, number = 3, page = {383-390}, title = {Horizontal redistribution of fluids in a porous medium: the role of interfacial area in modeling hysteresis}, volume = 32, year = 2009 }
19. Cao, Y., Helmig, R., & Wohlmuth, B. I. (2009). Geometrical interpretation of the multipoint flux approximation L-method. International Journal for Numerical Methods in Fluids, 60, Article 11. https://doi.org/10.1002/fld.1926
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  @article{NULL, author = {Cao, Yufei and Helmig, Rainer and Wohlmuth, Barbara I.}, doi = {10.1002/fld.1926}, journal = {International Journal for Numerical Methods in Fluids}, month = {12}, note = {, IWS2ID=2379 }, number = 11, page = {1173-1199}, title = {Geometrical interpretation of the multipoint flux approximation L-method}, volume = 60, year = 2009 }
20. Niessner, J., & Helmig, R. (2009). Multi-physics modeling of flow and transport in porous media using a downscaling approach. Advances in Water Resources, 32, Article 6. https://doi.org/10.1016/j.advwatres.2009.02.007
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  BibTeX
  @article{NULL, author = {Niessner, Jennifer and Helmig, Rainer}, doi = {10.1016/j.advwatres.2009.02.007}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2430 }, number = 6, page = {845-850}, title = {Multi-physics modeling of flow and transport in porous media using a downscaling approach}, volume = 32, year = 2009 }
21. Dogan, M. O., Class, H., & Helmig, R. (2009). Different concepts for the coupling of porous-media flow with lower-dimensional pipe flow. Computer Modeling in Engineering & Sciences, 53, Article 3. https://doi.org/10.3970/cmes.2009.053.207
  - BibTeX
  BibTeX
  @article{NULL, author = {Dogan, Mehmet Onur and Class, Holger and Helmig, Rainer}, doi = {10.3970/cmes.2009.053.207}, journal = {Computer Modeling in Engineering & Sciences}, month = {00}, note = {, IWS2ID=2513 }, number = 3, page = {207-233}, title = {Different concepts for the coupling of porous-media flow with lower-dimensional pipe flow}, volume = 53, year = 2009 }
22. Haegland, H., Assteerawatt, A., Dahle, H. K., Eigestad, G. T., & Helmig, R. (2009). Comparison of cell- and vertex-centered discretization methods for flow in a two-dimensional discrete-fracture-matrix system. Advances in Water Resources, 32.
  - BibTeX
  BibTeX
  @article{NULL, author = {Haegland, Hakonh and Assteerawatt, Anongnart and Dahle, Helge K. and Eigestad, G. T. and Helmig, Rainer}, journal = {Advances in Water Resources}, month = {10}, note = {, IWS2ID=2713 , Partnerinstitution: RMS, London; Department of Mathematics and CIPR, University of Bergen; Perecon AS, Bergen , Partneraddress: }, page = {1740-1755}, title = {Comparison of cell- and vertex-centered discretization methods for flow in a two-dimensional discrete-fracture-matrix system}, volume = 32, year = 2009 }
2008
1. Papafotiou, A., Helmig, R., Schaap, J., Lehmann, P., Kaestner, A., Flühler, H., Neuweiler, I., Hassanein, R., Ahrenholz, B., Tölke, J., Peters, A., & Durner, W. (2008). From the pore scale to the lab scale: 3D lab experiment and numerical simulation of drainage in heterogeneous porous media. Advances in Water Resources, 31, Article 9. https://doi.org/10.1016/j.advwatres.2007.09.006
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  BibTeX
  @article{NULL, author = {Papafotiou, Alexandros and Helmig, Rainer and Schaap, Joris and Lehmann, Peter and Kaestner, Anders and Flühler, Hannes and Neuweiler, Insa and Hassanein, Rene and Ahrenholz, Benjamin and Tölke, Jonas and Peters, Andre and Durner, Wolfgang}, doi = {10.1016/j.advwatres.2007.09.006}, journal = {Advances in Water Resources}, month = {09}, note = {, IWS2ID=2148 }, number = 9, page = {1253-1268}, title = {From the pore scale to the lab scale: 3D lab experiment and numerical simulation of drainage in heterogeneous porous media}, url = {http://dx.doi.org/10.1016/j.advwatres.2007.09.006}, volume = 31, year = 2008 }
  Link
  http://dx.doi.org/10.1016/j.advwatres.2007.09.006
2. Class, H., Helmig, R., & Neuweiler, I. (2008). Sequential coupling of models for contaminant spreading in the vadose zone. Vadose Zone Journal, 7, Article 2. https://doi.org/10.2136/vzj2007.0056
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  BibTeX
  @article{NULL, author = {Class, Holger and Helmig, Rainer and Neuweiler, Insa}, doi = {10.2136/vzj2007.0056}, journal = {Vadose Zone Journal}, month = {12}, note = {, IWS2ID=2195 }, number = 2, page = {721-731}, title = {Sequential coupling of models for contaminant spreading in the vadose zone}, volume = 7, year = 2008 }
3. Oladyshkin, S., Royer, J.-J., & Panfilov, M. (2008). Effective solution through the streamline technique and HT-splitting for the 3D dynamic analysis of the compositional flows in oil reservoirs. Transport in Porous Media, 74,No.3.
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  BibTeX
  @article{NULL, author = {Oladyshkin, Sergey and Royer, Jean-Jacques and Panfilov, Mikhail}, journal = {Transport in Porous Media}, month = {01}, note = {, IWS2ID=2874 }, page = {311-329}, title = {Effective solution through the streamline technique and HT-splitting for the 3D dynamic analysis of the compositional flows in oil reservoirs}, volume = {74,No.3}, year = 2008 }
4. Manthey, S., Hassanizadeh, S. M., Helmig, R., & Hilfer, R. (2008). Dimensional analysis of two-phase flow including a rate-dependent capillary pressure-saturation relationship. Advances in Water Resources, 31, Article 9. https://doi.org/10.1016/j.advwatres.2008.01.021
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  BibTeX
  @article{NULL, author = {Manthey, Sabine and Hassanizadeh, S. Majid and Helmig, Rainer and Hilfer, Rudolf}, doi = {10.1016/j.advwatres.2008.01.021}, journal = {Advances in Water Resources}, month = {09}, note = {, IWS2ID=2423 }, number = 9, page = {1137-1150}, title = {Dimensional analysis of two-phase flow including a rate-dependent capillary pressure-saturation relationship}, url = {http://dx.doi.org/10.1016/j.advwatres.2008.01.021}, volume = 31, year = 2008 }
  Link
  http://dx.doi.org/10.1016/j.advwatres.2008.01.021
5. Schwede, R., Cirpka, O. A., Nowak, W., & Neuweiler, I. (2008). Impact of Sampling Volume on the Probability Density Function of Steady-State Concentration. Water Resources Research, 44, Article W12433. https://doi.org/10.1029/2007WR006668
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  BibTeX
  @article{NULL, author = {Schwede, Ronnie and Cirpka, Olaf Arie and Nowak, Wolfgang and Neuweiler, Insa}, doi = {10.1029/2007WR006668}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2262 }, number = {W12433}, title = {Impact of Sampling Volume on the Probability Density Function of Steady-State Concentration}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Schwede_al_2008WRR_concentration_pdf.pdf}, volume = 44, year = 2008 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Schwede_al_2008WRR_concentration_pdf.pdf
6. Nowak, W., Schwede, R., Cirpka, O. A., & Neuweiler, I. (2008). Probability density functions of hydraulic head and velocity in three-dimensional heterogeneous porous media. Water Resources Research, 44, Article W08452. https://doi.org/10.1029/2007WR006383
  - BibTeX
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  BibTeX
  @article{NULL, author = {Nowak, Wolfgang and Schwede, Ronnie and Cirpka, Olaf Arie and Neuweiler, Insa}, doi = {10.1029/2007WR006383}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2261 }, number = {W08452}, title = {Probability density functions of hydraulic head and velocity in three-dimensional heterogeneous porous media}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Nowak_al_2008_velocity_statistics.pdf}, volume = 44, year = 2008 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Nowak_al_2008_velocity_statistics.pdf
7. Bielinski, A., Kopp, A., Schütt, H., & Class, H. (2008). Monitoring of CO2 plumes during storage in geological formations using temperature signals: numerical investigation (No. 2). Article 2. https://doi.org/10.1016/j.ijggc.2008.02.008
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  BibTeX
  @article{NULL, author = {Bielinski, Andreas and Kopp, Andreas and Schütt, Hartmut and Class, Holger}, doi = {10.1016/j.ijggc.2008.02.008}, editor = {Gale, J.}, month = {04}, note = {, IWS2ID=2233 , Address: IEA Greenhouse Gas R&D Programme, Gloucestershire, UK }, number = 2, page = {319-328}, publisher = {International Journal of Greenhouse Gas Control}, title = {Monitoring of CO2 plumes during storage in geological formations using temperature signals: numerical investigation}, year = 2008 }
8. Niessner, J., & Hassanizadeh, S. M. (2008). A model for two-phase flow in porous media including fluid-fluid interfacial area. Water Resources Research, 44, Article W08439. https://doi.org/10.1029/2007WR006721
  - BibTeX
  BibTeX
  @article{NULL, author = {Niessner, Jennifer and Hassanizadeh, S. Majid}, doi = {10.1029/2007WR006721}, journal = {Water Resources Research}, month = {08}, note = {, IWS2ID=2196 }, number = {W08439}, title = {A model for two-phase flow in porous media including fluid-fluid interfacial area}, volume = 44, year = 2008 }
9. Vasin, M., Lehmann, P., Kaestner, A., Hassanein, R., Nowak, W., Helmig, R., & Neuweiler, I. (2008). Drainage in heterogeneous sand columns with different geometric structures. Advances in Water Resources, 31, Article 9. https://doi.org/10.1016/j.advwatres.2008.01.004
  - BibTeX
  BibTeX
  @article{NULL, author = {Vasin, Milos and Lehmann, Peter and Kaestner, Anders and Hassanein, Rene and Nowak, Wolfgang and Helmig, Rainer and Neuweiler, Insa}, doi = {10.1016/j.advwatres.2008.01.004}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2433 }, number = 9, page = {1205-1220}, title = {Drainage in heterogeneous sand columns with different geometric structures}, volume = 31, year = 2008 }
10. Johannsen, K., Kopp, A., Tourunen, O., & Kleist, J. (2008). Studying CO2 Sequestration with the Power of Supercomputing. European Research Consortium for Informatics and Mathematics (ERCIM), 74.
  - BibTeX
  BibTeX
  @article{NULL, author = {Johannsen, Klaus and Kopp, Andreas and Tourunen, Olli and Kleist, Josva}, journal = {European Research Consortium for Informatics and Mathematics (ERCIM)}, month = {07}, note = {, IWS2ID=2321 }, page = {17-18}, title = {Studying CO2 Sequestration with the Power of Supercomputing}, volume = 74, year = 2008 }
11. Eder, M., Kobus, H., & Helmig, R. (2008). Dreidimensionale Modellierung der Hydrodynamik im Bodensee. Wasserwirtschaft, 98,1.
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  @article{NULL, author = {Eder, Magdalena and Kobus, Helmut and Helmig, Rainer}, journal = {Wasserwirtschaft}, month = {12}, note = {, IWS2ID=2387 }, page = {16-21}, title = {Dreidimensionale Modellierung der Hydrodynamik im Bodensee}, volume = {98,1}, year = 2008 }
2007
1. Oladyshkin, S., & Panfilov, M. (2007). Limit thermodynamic model for compositional gas-liquid systems moving in a porous medium. Transport in Porous Media, 70,No.2.
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  BibTeX
  @article{NULL, author = {Oladyshkin, Sergey and Panfilov, Mikhail}, journal = {Transport in Porous Media}, month = {01}, note = {, IWS2ID=2871 }, page = {147-165}, title = {Limit thermodynamic model for compositional gas-liquid systems moving in a porous medium}, volume = {70,No.2}, year = 2007 }
2. Niessner, J., & Helmig, R. (2007). Multi-scale modeling of three-phase--three-component processes in heterogeneous porous media. Advances in Water Resources, 30, Article 11. https://doi.org/10.1016/j.advwatres.2007.05.008
  - BibTeX
  BibTeX
  @article{NULL, author = {Niessner, Jennifer and Helmig, Rainer}, doi = {10.1016/j.advwatres.2007.05.008}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2015 }, number = 11, page = {2309-2325}, title = {Multi-scale modeling of three-phase--three-component processes in heterogeneous porous media}, volume = 30, year = 2007 }
3. Neuweiler, I., & Vogel, H.-J. (2007). Upscaling for unsaturated flow for non-Gaussian heterogeneous porous media. Water Resources Research, 43.
  - BibTeX
  BibTeX
  @article{NULL, author = {Neuweiler, Insa and Vogel, Hans-Jörg}, journal = {Water Resources Research}, month = {03}, note = {, IWS2ID=2258 }, page = {doi:10.1029/200}, title = {Upscaling for unsaturated flow for non-Gaussian heterogeneous porous media}, volume = 43, year = 2007 }
4. Oladyshkin, S., Skachkov, S., Panfilova, I., & Panfilov, M. (2007). Upscaling fractured media and streamline HT-splitting in compositional reservoir simulation. Oil & Gas Science and Technology-Revue de l’IFP, 62,No.2.
  - BibTeX
  BibTeX
  @article{NULL, author = {Oladyshkin, Sergey and Skachkov, Sergey and Panfilova, Irina and Panfilov, Mikhail}, journal = {Oil & Gas Science and Technology-Revue de l'IFP}, month = {07}, note = {, IWS2ID=2873 }, page = {137-146}, title = {Upscaling fractured media and streamline HT-splitting in compositional reservoir simulation }, volume = {62,No.2}, year = 2007 }
5. Helmig, R., Weiss, A., & Wohlmuth, B. I. (2007). Dynamic capillary effects in heterogeneous porous media (No. 3). 11, Article 3. https://doi.org/10.1007/s10596-007-9050-1
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  BibTeX
  @article{NULL, author = {Helmig, Rainer and Weiss, Alexander and Wohlmuth, Barbara I.}, doi = {10.1007/s10596-007-9050-1}, month = {12}, note = {, IWS2ID=2142 }, number = 3, page = {261-274}, publisher = {Computational Geosciences}, title = {Dynamic capillary effects in heterogeneous porous media}, volume = 11, year = 2007 }
6. Hurter, S., Garnett, A., Bielinski, A., & Kopp, A. (2007). Thermal Signature of Free-Phase CO2 in Porous Rocks: Detectability of CO2 by Temperature Logging (No. SPE109007). Article SPE109007.
  - BibTeX
  BibTeX
  @article{NULL, author = {Hurter, Suzanne and Garnett, Alf and Bielinski, Andreas and Kopp, Andreas}, month = {09}, note = { presentation at Offshore Europe 2007, held in Aberdeen, Scotland, U.K., 4-7 September 2007, IWS2ID=2106 }, number = {SPE109007}, publisher = {Society of Petroleum Engineers}, title = {Thermal Signature of Free-Phase CO2 in Porous Rocks: Detectability of CO2 by Temperature Logging}, year = 2007 }
7. Kobayashi, K., Hinkelmann, R., Helmig, R., Takara, K., & Tamai, N. (2007). A numerical experiment with two-phase and two-phase/three-component models for the methane migration in the subsurface aquifer (No. 2). 63, Article 2.
  - BibTeX
  BibTeX
  @article{NULL, author = {Kobayashi, Kenichiro and Hinkelmann, Reinhard and Helmig, Rainer and Takara, Kaoru and Tamai, Nobuyuki}, month = {05}, note = {Journal of Hydraulic, Coastal and Environmental Engineering, IWS2ID=2103 }, number = 2, page = {120-133}, publisher = {Japan Society of Civil Engineers, Doboku Gakkai Ronbunshuu B}, title = {A numerical experiment with two-phase and two-phase/three-component models for the methane migration in the subsurface aquifer}, volume = 63, year = 2007 }
8. Oladyshkin, S., & Panfilov, M. (2007). Streamline splitting between thermodynamics and hydrodynamics in compositional gas-liquid flow through porous media. 335,No.1.
  - BibTeX
  BibTeX
  @article{NULL, author = {Oladyshkin, Sergey and Panfilov, Mikhail}, month = {01}, note = {, IWS2ID=2872 }, page = {07--12}, title = {Streamline splitting between thermodynamics and hydrodynamics in compositional gas-liquid flow through porous media}, volume = {335,No.1}, year = 2007 }
9. Ebigbo, A., Class, H., & Helmig, R. (2007). CO2 leakage through an abandoned well: Problem-oriented benchmarks (No. 2). 11, Article 2. https://doi.org/10.1007/s10596-006-9033-7
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Ebigbo, Anozie and Class, Holger and Helmig, Rainer}, doi = {10.1007/s10596-006-9033-7}, month = {12}, note = {, IWS2ID=1966 }, number = 2, page = {103-115}, publisher = {Computational Geosciences}, title = {CO2 leakage through an abandoned well: Problem-oriented benchmarks}, url = {http://dx.doi.org/10.1007/s10596-006-9033-7}, volume = 11, year = 2007 }
  Link
  http://dx.doi.org/10.1007/s10596-006-9033-7
10. van Duijn, C. J., Eichel, H., Helmig, R., & Pop, I. S. (2007). Effective equations for two-phase flow in porous media: the effect of trapping on the microscale. Transport in Porous Media, 69, Article 3. https://doi.org/10.1007/s11242-006-9089-9
  - BibTeX
  BibTeX
  @article{NULL, author = {van Duijn, Cornelis Johannes and Eichel, Hartmut and Helmig, Rainer and Pop, Iuliu Sorin}, doi = {10.1007/s11242-006-9089-9}, journal = {Transport in Porous Media}, month = {12}, note = {, IWS2ID=2141 }, number = 3, page = {411-428}, title = {Effective equations for two-phase flow in porous media: the effect of trapping on the microscale}, volume = 69, year = 2007 }
11. Flemisch, B., & Wohlmuth, B. I. (2007). Stable Lagrange multipliers for quadrilateral meshes of curved interfaces in 3D. Computational Methods in Applied Mechanical Engineering, 196. https://doi.org/10.1016/j.cma.2006.03.022
  - BibTeX
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  BibTeX
  @article{NULL, author = {Flemisch, Bernd and Wohlmuth, Barbara I.}, doi = {10.1016/j.cma.2006.03.022}, journal = {Computational Methods in Applied Mechanical Engineering}, month = {12}, note = {, IWS2ID=2359 }, page = {1589-1602}, title = {Stable Lagrange multipliers for quadrilateral meshes of curved interfaces in 3D}, url = {http://www.sciencedirect.com/science/article/pii/S0045782506002866}, volume = 196, year = 2007 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0045782506002866
2006
1. Nowak, W., & Cirpka, O. A. (2006). Geostatistical inference of hydraulic conductivity and dispersivities from hydraulic heads and tracer data (No. W08416). 42, Article W08416. https://doi.org/10.1029/2005WR004832
  - BibTeX
  - Link
  BibTeX
  @article{nowak2006geostatistical, author = {Nowak, Wolfgang and Cirpka, Olaf Arie}, doi = {10.1029/2005WR004832}, month = {12}, note = {, IWS2ID=1150 }, number = {W08416}, publisher = {Water Resources Research}, title = {Geostatistical inference of hydraulic conductivity and dispersivities from hydraulic heads and tracer data}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Nowak_Cirpka_2006WR_LogD_method.pdf}, volume = 42, year = 2006 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Nowak_Cirpka_2006WR_LogD_method.pdf
2. Reichenberger, V., Jakobs, H., Bastian, P., & Helmig, R. (2006). A mixed-dimensional finite volume method for two-phase flow in fractured porous media. Advances in Water Resources, 29, Article 7. https://doi.org/10.1016/j.advwatres.2005.09.001
  - BibTeX
  BibTeX
  @article{NULL, author = {Reichenberger, Volker and Jakobs, Hartmut and Bastian, Peter and Helmig, Rainer}, doi = {10.1016/j.advwatres.2005.09.001}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2447 , Partnerinstitution: Institut für Wissenschaftliches Rechnen , Partneraddress: Heidelberg }, number = 7, page = {1020-1036}, title = {A mixed-dimensional finite volume method for two-phase flow in fractured porous media }, volume = 29, year = 2006 }
3. Acosta, M., Merten, C., Eigenberger, G., Class, H., Helmig, R., Thoben, B., & Müller-Steinhagen, H. (2006). Modeling non-isothermal two-phase multicomponent flow in the cathode of PEM fuel cells (No. 2). Article 2. https://doi.org/10.1016/j.jpowsour.2005.12.068
  - BibTeX
  BibTeX
  @article{acostaetal:2005, author = {Acosta, Maria and Merten, Clemens and Eigenberger, Gerhart and Class, Holger and Helmig, Rainer and Thoben, Birgit and Müller-Steinhagen, Hans}, doi = {10.1016/j.jpowsour.2005.12.068}, month = {09}, note = {, IWS2ID=1369 }, number = 2, page = {1123-1141}, publisher = {Journal of Power Sources}, title = {Modeling non-isothermal two-phase multicomponent flow in the cathode of PEM fuel cells}, year = 2006 }
4. Neuweiler, I., & Vogel, H.-J. (2006). Upscaling of unsaturated flow considering connectivity.
  - BibTeX
  BibTeX
  @article{NULL, author = {Neuweiler, Insa and Vogel, Hans-Jörg}, month = {12}, note = {accepted, IWS2ID=1806 , Partnerinstitution: UFZ-Umweltforschungszentrum Leipzig-Halle GmbH }, publisher = {Water Resources Research}, title = {Upscaling of unsaturated flow considering connectivity}, year = 2006 }
5. Niessner, J., & Helmig, R. (2006). Multi-scale modeling of two-phase - two-component processes in heterogeneous porous media. Numerical Linear Algebra with Applications, 13, Article 9. https://doi.org/10.1002/nla.497
  - BibTeX
  BibTeX
  @article{NULL, author = {Niessner, Jennifer and Helmig, Rainer}, booktitle = {Numerical Linear Algebra with Applications}, doi = {10.1002/nla.497}, journal = {Numerical Linear Algebra with Applications}, month = {12}, note = {, IWS2ID=1822 }, number = 9, page = {699-715}, title = {Multi-scale modeling of two-phase - two-component processes in heterogeneous porous media}, volume = 13, year = 2006 }
6. Kopp, A., & Sheta, H. (2006). Grid Generation for Complex Geological Systems in Mining Areas. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/kopp21-AB.pdf
  - BibTeX
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  BibTeX
  @article{NULL, author = {Kopp, Andreas and Sheta, Hussam}, month = {10}, note = {, IWS2ID=1952 , Institution: European Union Marie Curie Conferences and Training Courses }, title = {Grid Generation for Complex Geological Systems in Mining Areas}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/kopp21-AB.pdf}, year = 2006 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/kopp21-AB.pdf
7. Flemisch, B., Kaltenbacher, M., & Wohlmuth, B. I. (2006). Elasto-acoustic and acoustic-acoustic coupling on nonmatching grids. International Journal of Numerical Methods in Engineering, 67. https://doi.org/10.1002/nme.1669
  - BibTeX
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  BibTeX
  @article{NULL, author = {Flemisch, Bernd and Kaltenbacher, Manfred and Wohlmuth, Barbara I.}, doi = {10.1002/nme.1669}, journal = {International Journal of Numerical Methods in Engineering}, month = {12}, note = {, IWS2ID=2358 }, page = {1791-1810}, title = {Elasto-acoustic and acoustic-acoustic coupling on nonmatching grids}, url = {http://onlinelibrary.wiley.com/doi/10.1002/nme.1669/full}, volume = 67, year = 2006 }
  Link
  http://onlinelibrary.wiley.com/doi/10.1002/nme.1669/full
8. Neuweiler, I., & Eichel, H. (2006). Effective parameter functions for Richards equation in layered porous media (No. 5). Article 5.
  - BibTeX
  BibTeX
  @article{NULL, author = {Neuweiler, Insa and Eichel, Hartmut}, month = {12}, note = {, IWS2ID=1788 }, number = 5, page = {963-977}, publisher = {Vadose Zone Journal}, title = {Effective parameter functions for Richards equation in layered porous media}, year = 2006 }
9. Helmig, R., Sheta, H., Meiners, H., & Kunz, E. (2006). Numerische Simulation von Gasströmen im Grubengebäude und im Gebirge (No. 01_02). 142, Article 01_02.
  - BibTeX
  BibTeX
  @article{NULL, author = {Helmig, Rainer and Sheta, Hussam and Meiners, Heribert and Kunz, Erwin}, month = {01}, note = {, IWS2ID=1824 }, number = {01_02}, page = {37-44}, publisher = {Glückauf}, title = {Numerische Simulation von Gasströmen im Grubengebäude und im Gebirge}, volume = 142, year = 2006 }
10. Class, H., Bielinski, A., Helmig, R., Kopp, A., & Ebigbo, A. (2006). Numerische Simulation der Speicherung von CO2 in geologischen Formationen (No. 4). 78, Article 4.
  - BibTeX
  BibTeX
  @article{classetal:2006, author = {Class, Holger and Bielinski, Andreas and Helmig, Rainer and Kopp, Andreas and Ebigbo, Anozie}, editor = {{Arlt, W. & Kreysa}, G.}, month = {03}, note = {, IWS2ID=1872 , Address: Weinheim }, number = 4, page = {445-452}, publisher = {Chemie Ingenieur Technik, Wiley-VCH}, title = {Numerische Simulation der Speicherung von CO2 in geologischen Formationen}, volume = 78, year = 2006 }
11. Helmig, R., Niessner, J., & Class, H. (2006). Recent advances in finite element methods for multi-phase flow processes in porous media (No. 03_04). 20, Article 03_04. https://doi.org/10.1080/00036810600792154
  - BibTeX
  BibTeX
  @article{NULL, author = {Helmig, Rainer and Niessner, Jennifer and Class, Holger}, doi = {10.1080/00036810600792154}, month = {12}, note = {, IWS2ID=1957 }, number = {03_04}, page = {245-252}, publisher = {International Journal of Computational Fluid Dynamics}, title = {Recent advances in finite element methods for multi-phase flow processes in porous media}, volume = 20, year = 2006 }
2005
1. Flemisch, B., Melenk, J. M., & Wohlmuth, B. I. (2005). Mortar methods with curved interfaces. Applied Numerical Mathematics, 54. https://doi.org/10.1016/j.apnum.2004.09.007
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  BibTeX
  @article{NULL, author = {Flemisch, Bernd and Melenk, Jens M. and Wohlmuth, Barbara I.}, doi = {10.1016/j.apnum.2004.09.007}, journal = {Applied Numerical Mathematics}, month = {12}, note = {, IWS2ID=2356 }, page = {339-361}, title = {Mortar methods with curved interfaces}, url = {http://www.sciencedirect.com/science/article/pii/S0168927404001837}, volume = 54, year = 2005 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0168927404001837
2. Niessner, J., Helmig, R., Jakobs, H., & Roberts, J. (2005). Interface condition and linearization schemes in the Newton iterations for two-phase flow in heterogeneous porous media (No. 7). 28, Article 7. https://doi.org/10.1016/j.advwatres.2005.01.006
  - BibTeX
  BibTeX
  @article{NULL, author = {Niessner, Jennifer and Helmig, Rainer and Jakobs, Hartmut and Roberts, Jean}, doi = {10.1016/j.advwatres.2005.01.006}, editor = {Barry, D.A and Krajewski, W.F. & C.T. Miller}, month = {01}, note = {, IWS2ID=1319 }, number = 7, page = {671-687}, publisher = {Advances in Water Resources}, title = {Interface condition and linearization schemes in the Newton iterations for two-phase flow in heterogeneous porous media}, volume = 28, year = 2005 }
3. Li, W., Nowak, W., & Cirpka, O. A. (2005). Geostatistical inverse modeling of transient pumping tests using temporal moments of drawdown (No. W08403). 41, Article W08403. https://doi.org/10.1029/2004WR003874
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Li, Wei and Nowak, Wolfgang and Cirpka, Olaf Arie}, doi = {10.1029/2004WR003874}, month = {12}, note = {, IWS2ID=1953 }, number = {W08403}, publisher = {Water Resources Research}, title = {Geostatistical inverse modeling of transient pumping tests using temporal moments of drawdown}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Li_Nowak_Cirpka_2005_Pumping_test_inverse_moments.pdf}, volume = 41, year = 2005 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Li_Nowak_Cirpka_2005_Pumping_test_inverse_moments.pdf
4. Braun, C., Helmig, R., & Manthey, S. (2005). Macro-scale effective constitutive relationships for two-phase flow processes in heterogeneous porous media with emphasis on the relative permeability-saturation-relationship (No. 01_02). 76, Article 01_02. https://doi.org/10.1016/j.jconhyd.2004.07.009
  - BibTeX
  BibTeX
  @article{braun2005macroscale, author = {Braun, Christopherus and Helmig, Rainer and Manthey, Sabine}, doi = {10.1016/j.jconhyd.2004.07.009}, month = {01}, note = {, IWS2ID=1283 }, number = {01_02}, page = {47-85}, publisher = {Journal of Contaminant Hydrology}, title = {Macro-scale effective constitutive relationships for two-phase flow processes in heterogeneous porous media with emphasis on the relative permeability-saturation-relationship}, volume = 76, year = 2005 }
5. Flemisch, B., Puso, M. A., & Wohlmuth, B. I. (2005). A new dual mortar method for curved interfaces: 2D elasticity. International Journal of Numerical Methods in Engineering, 63. https://doi.org/10.1002/nme.1300
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Flemisch, Bernd and Puso, Michael A. and Wohlmuth, Barbara I.}, doi = {10.1002/nme.1300}, journal = {International Journal of Numerical Methods in Engineering}, month = {12}, note = {, IWS2ID=2357 }, page = {813-832}, title = {A new dual mortar method for curved interfaces: 2D elasticity}, url = {http://onlinelibrary.wiley.com/doi/10.1002/nme.1300/full}, volume = 63, year = 2005 }
  Link
  http://onlinelibrary.wiley.com/doi/10.1002/nme.1300/full
6. Neuweiler, I., & Cirpka, O. A. (2005). Homogenization of Richards Equation in Permeability Fields with Different Connectivities (No. 2). 41, Article 2. https://doi.org/10.1029/2004WR003329
  - BibTeX
  BibTeX
  @article{NULL, author = {Neuweiler, Insa and Cirpka, Olaf Arie}, doi = {10.1029/2004WR003329}, month = {02}, note = {, IWS2ID=805 }, number = 2, publisher = {Water Resources Research}, title = {Homogenization of Richards Equation in Permeability Fields with Different Connectivities}, volume = 41, year = 2005 }
7. Rahman, A. Md., Jose Chackiath, S., Nowak, W., & Cirpka, O. A. (2005). Experiments on vertical transverse mixing in a large-scale heterogeneous model aquifer (No. 80). 03_04, Article 80. https://doi.org/10.1016/j.jconhyd.2005.06.010
  - BibTeX
  BibTeX
  @article{rahman2005experiments, author = {Rahman, Arifur Md. and Jose Chackiath, Surabhin and Nowak, Wolfgang and Cirpka, Olaf Arie}, doi = {10.1016/j.jconhyd.2005.06.010}, month = {12}, note = {, IWS2ID=1036 }, number = 80, page = {130-148}, publisher = {Journal of Contaminant Hydrology}, title = {Experiments on vertical transverse mixing in a large-scale heterogeneous model aquifer}, volume = {03_04}, year = 2005 }
8. Mödinger, J., & Kobus, H. (2005). Approach and Methods for the Assessment of Sustainable Groundwater Management in the Rhine-Neckar-Region, Germany (No. 3). 21, Article 3.
  - BibTeX
  BibTeX
  @article{NULL, author = {Mödinger, Jens and Kobus, Helmut}, editor = {Biswas, Asit K.}, month = {09}, note = {, IWS2ID=1706 }, number = 3, page = {437-451}, publisher = {International Journal of Water Resources Development}, title = {Approach and Methods for the Assessment of Sustainable Groundwater Management in the Rhine-Neckar-Region, Germany}, volume = 21, year = 2005 }
9. Flemisch, B., Maday, Y., Rapetti, F., & Wohlmuth, B. I. (2005). Scalar and vector potentials’ coupling on nonmatching grids for the simulation of an electromagnetic brake. Compel, 24. https://doi.org/10.1108/03321640510571246
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Flemisch, Bernd and Maday, Yvon and Rapetti, Francesca and Wohlmuth, Barbara I.}, doi = {10.1108/03321640510571246}, journal = {COMPEL}, month = {12}, note = {, IWS2ID=2365 }, page = {1061-1070}, title = {Scalar and vector potentials' coupling on nonmatching grids for the simulation of an electromagnetic brake}, url = {http://www.emeraldinsight.com/doi/abs/10.1108/03321640510571246}, volume = 24, year = 2005 }
  Link
  http://www.emeraldinsight.com/doi/abs/10.1108/03321640510571246
10. Haas, T. (2005). Wir sind nun Orientalen geworden. Die Anfänge der Kreuzfahrerherrschaften. 11_05.
  - BibTeX
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  @article{NULL, author = {Haas, Thomas}, month = {11}, note = {, IWS2ID=3018 }, page = {14-21}, title = {Wir sind nun Orientalen geworden. Die Anfänge der Kreuzfahrerherrschaften}, volume = {11_05}, year = 2005 }
11. Manthey, S., Hassanizadeh, S. M., & Helmig, R. (2005). Macro-scale dynamic effects in homogeneous and heterogeneous porous media (No. 01_02). 58, Article 01_02. https://doi.org/10.1007/s11242-004-5472-6
  - BibTeX
  BibTeX
  @article{NULL, author = {Manthey, Sabine and Hassanizadeh, S. Majid and Helmig, Rainer}, doi = {10.1007/s11242-004-5472-6}, month = {12}, note = {, IWS2ID=1673 }, number = {01_02}, page = {121-145}, publisher = {Transport in Porous Media}, title = {Macro-scale dynamic effects in homogeneous and heterogeneous porous media}, volume = 58, year = 2005 }
2004
1. Cirpka, O. A., & Nowak, W. (2004). First-Order Variance of Travel Time in Non-Stationary Formations (No. W03507(3)). 40, Article W03507(3). https://doi.org/10.1029/2003WR002851
  - BibTeX
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  BibTeX
  @article{cirpka2004firstorder, author = {Cirpka, Olaf Arie and Nowak, Wolfgang}, doi = {10.1029/2003WR002851}, month = {12}, note = {, IWS2ID=581 }, number = {W03507(3)}, publisher = {Water Resources Research}, title = {First-Order Variance of Travel Time in Non-Stationary Formations}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Cirpka_Nowak_2004_Traveltime_Moments.pdf}, volume = 40, year = 2004 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Cirpka_Nowak_2004_Traveltime_Moments.pdf
2. Nowak, W., & Cirpka, O. A. (2004). A Modified Levenberg-Marquardt Algorithm for Quasi-Linear Geostatistical Inversing (No. 27). 7, Article 27. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Nowak_Cirpka_2004_LM.pdf
  - BibTeX
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  BibTeX
  @article{Nowak2003b, author = {Nowak, Wolfgang and Cirpka, Olaf Arie}, month = {12}, note = {, IWS2ID=198 }, number = 27, page = {737-750}, publisher = {Advances in Water Resources}, title = {A Modified Levenberg-Marquardt Algorithm for Quasi-Linear Geostatistical Inversing}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Nowak_Cirpka_2004_LM.pdf}, volume = 7, year = 2004 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Nowak_Cirpka_2004_LM.pdf
3. Hilfer, R., & Helmig, R. (2004). Dimensional analysis and upscaling of two-phase flow in porous media with piecewise constant heterogeneities (No. 10). 27, Article 10. https://doi.org/10.1016/j.advwatres.2004.07.003
  - BibTeX
  BibTeX
  @article{hilfer2004dimensional, author = {Hilfer, Rudolf and Helmig, Rainer}, doi = {10.1016/j.advwatres.2004.07.003}, month = {10}, note = {, IWS2ID=1205 }, number = 10, page = {1033-1040}, publisher = {Advances in Water Resources}, title = {Dimensional analysis and upscaling of two-phase flow in porous media with piecewise constant heterogeneities }, volume = 27, year = 2004 }
4. Mödinger, J., Kobus, H., Schnitzler, S., & Lehn, H. (2004). Ansätze für eine nachhaltige Grundwasserbewirtschaftung und -nutzung im Rhein-Neckar-Raum bei konkurrierenden Interessen. 94.
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  @article{modinger2004anstze, author = {Mödinger, Jens and Kobus, Helmut and Schnitzler, Sebastian and Lehn, Helmut}, month = {12}, note = {, IWS2ID=1705 }, page = {40-45}, publisher = {Wasserwirtschaft}, title = {Ansätze für eine nachhaltige Grundwasserbewirtschaftung und -nutzung im Rhein-Neckar-Raum bei konkurrierenden Interessen}, volume = 94, year = 2004 }
5. Hazra, S. B., Class, H., Helmig, R., & Schulz, V. (2004). Forward and inverse problems in modeling of multiphase flow and transport through porous media (No. 1). 8, Article 1. https://doi.org/10.1023/B:COMG.0000024445.39048.21
  - BibTeX
  BibTeX
  @article{subhendu:2004, author = {Hazra, Subhendu Bikash and Class, Holger and Helmig, Rainer and Schulz, Volker}, doi = {10.1023/B:COMG.0000024445.39048.21}, month = {12}, note = {, IWS2ID=796 }, number = 1, page = {21-47}, publisher = {Computational Geosciences}, title = {Forward and inverse problems in modeling of multiphase flow and transport through porous media}, volume = 8, year = 2004 }
6. Cirpka, O. A., Bürger, C. M., Nowak, W., & Finkel, M. (2004). Uncertainty and data worth analysis for the hydraulic design of funnel-and-gate systems in heterogeneous aquifers (No. 40). W11502, Article 40. https://doi.org/10.1029/2004WR003352
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Cirpka, Olaf Arie and Bürger, Claudius M. and Nowak, Wolfgang and Finkel, Michael}, doi = {10.1029/2004WR003352}, month = {12}, note = {, IWS2ID=809 , Partnerinstitution: Zentrum für angewandte Geowissenschaften , Partneraddress: Universität Tübingen }, number = 40, publisher = {Water Resources Research}, title = {Uncertainty and data worth analysis for the hydraulic design of funnel-and-gate systems in heterogeneous aquifers}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Cirpka_al_2004WRR_Data_Worth.pdf}, volume = {W11502}, year = 2004 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Cirpka_al_2004WRR_Data_Worth.pdf
7. Findikatis, A., Helmig, R., Kitanidis, P. K., Nimmo, J., Pruess, K., Rubin, Y., Stauffer, F., & Tsang, C.-F. (2004). Summary of a panel discussion at the International Groundwater Symposium held onMarch 25-28. 2002 Berkeley, Califorina, USA (No. 03_04). 42, Article 03_04.
  - BibTeX
  BibTeX
  @article{findikatis2004summary, author = {Findikatis, Angelos and Helmig, Rainer and Kitanidis, Peter K. and Nimmo, J. and Pruess, Karsten and Rubin, Yoram and Stauffer, Fritz and Tsang, Chin-Fu}, month = {03}, note = {, IWS2ID=1284 }, number = {03_04}, publisher = {Journal of Hydraulic Research}, title = {Summary of a panel discussion at the International Groundwater Symposium held onMarch 25-28. 2002 Berkeley, Califorina, USA}, volume = 42, year = 2004 }
8. Jose Chackiath, S., Rahman, A. Md., & Cirpka, O. A. (2004). Large-scale sandbox experiment on longitudinal effective dispersion in heterogeneous porous media. https://onlinelibrary.wiley.com/doi/10.1029/2004WR003363/full
  - BibTeX
  - Link
  BibTeX
  @article{josechackiath2004largescale, author = {Jose Chackiath, Surabhin and Rahman, Arifur Md. and Cirpka, Olaf Arie}, month = {12}, note = {, IWS2ID=811 }, publisher = {Water Resources Research}, title = {Large-scale sandbox experiment on longitudinal effective dispersion in heterogeneous porous media}, url = {https://onlinelibrary.wiley.com/doi/10.1029/2004WR003363/full}, year = 2004 }
  Link
  https://onlinelibrary.wiley.com/doi/10.1029/2004WR003363/full
9. Benekos, I., Cirpka, O. A., Rahman, A. Md., & Kitanidis, P. K. (2004). Experimental determination of transverse dispersion parameters in a helical device.
  - BibTeX
  BibTeX
  @article{benekos2004experimental, author = {Benekos, Ioannis and Cirpka, Olaf Arie and Rahman, Arifur Md. and Kitanidis, Peter K.}, month = {12}, note = {, IWS2ID=810 , Partnerinstitution: Stanford University, Department of Civil & Environmental Engineering , Partneraddress: Stanford, California, USA }, publisher = {Water Resources Research}, title = {Experimental determination of transverse dispersion parameters in a helical device}, year = 2004 }
10. Neuweiler, I., Sorensen, I., & Kinzelbach, W. (2004). Experimental and theoretical investigations of drainage in horizontal rough-walled fractures with different correlation structures (No. 12). 27, Article 12.
  - BibTeX
  BibTeX
  @article{neuweiler2004experimental, author = {Neuweiler, Insa and Sorensen, Ivan and Kinzelbach, Wolfgang}, month = {12}, note = {, IWS2ID=804 }, number = 12, page = {1217-1231}, publisher = {Advances in Water Resources}, title = {Experimental and theoretical investigations of drainage in horizontal rough-walled fractures with different correlation structures}, volume = 27, year = 2004 }
11. Cirpka, O. A., Olsson, Ĺ., Ju, Q., Rahman, A. Md., & Grathwohl, P. (2004). Length of Reactive Plumes Controlled by Transverse Dispersion. https://www.ncbi.nlm.nih.gov/pubmed/16556203
  - BibTeX
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  BibTeX
  @article{cirpka2004length, author = {Cirpka, Olaf Arie and Olsson, Ĺsa and Ju, Qingsong and Rahman, Arifur Md. and Grathwohl, Peter}, month = {12}, note = {, IWS2ID=792 , Institution: Institut für Wasserbau , Address: Universität Stuttgart , Partnerinstitution: Zentrum für angewandte Geowissenschaften , Partneraddress: Universität Tübingen }, publisher = {Environmental Science & Technology}, title = {Length of Reactive Plumes Controlled by Transverse Dispersion}, url = {https://www.ncbi.nlm.nih.gov/pubmed/16556203}, year = 2004 }
  Link
  https://www.ncbi.nlm.nih.gov/pubmed/16556203
12. Flemisch, B., Maday, Y., Rapetti, F., & Wohlmuth, B. I. (2004). Coupling scalar and vector potentials on non-matching grids for eddy currents modelling in a moving conductor. Journal of Computational and Applied Mathematics, 168. https://doi.org/10.1016/j.cam.2003.05.017
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Flemisch, Bernd and Maday, Yvon and Rapetti, Francesca and Wohlmuth, Barbara I.}, doi = {10.1016/j.cam.2003.05.017}, journal = {Journal of Computational and Applied Mathematics}, month = {12}, note = {, IWS2ID=2363 }, page = {192-205}, title = {Coupling scalar and vector potentials on non-matching grids for eddy currents modelling in a moving conductor}, url = {http://www.sciencedirect.com/science/article/pii/S0377042703009774}, volume = 168, year = 2004 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0377042703009774
13. Flemisch, B., & Wohlmuth, B. I. (2004). A domain decomposition method on nested domains and nonmatching grids. Numerical Methods for Partial Differential Equations, 20. https://doi.org/10.1002/num.10095
  - BibTeX
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  BibTeX
  @article{NULL, author = {Flemisch, Bernd and Wohlmuth, Barbara I.}, doi = {10.1002/num.10095}, journal = {Numerical Methods for Partial Differential Equations}, month = {12}, note = {, IWS2ID=2355 }, page = {374-387}, title = {A domain decomposition method on nested domains and nonmatching grids}, url = {http://onlinelibrary.wiley.com/doi/10.1002/num.10095/abstract}, volume = 20, year = 2004 }
  Link
  http://onlinelibrary.wiley.com/doi/10.1002/num.10095/abstract
14. Hinkelmann, R., Paul, M., Helmig, R., & Breiting, T. (2004). New media in environmental and water-related engineering education (No. 2). 13, Article 2.
  - BibTeX
  BibTeX
  @article{Hinkelmann:2004a, author = {Hinkelmann, Reinhard and Paul, Maren and Helmig, Rainer and Breiting, Thomas}, month = {12}, note = {Indexed in Chemical Abstracts and AJOL www.ajol.info, ISSN 1019-1593, IWS2ID=645 }, number = 2, publisher = {Botswana Journal of Technology}, title = {New media in environmental and water-related engineering education}, volume = 13, year = 2004 }
15. Jose Chackiath, S., & Cirpka, O. A. (2004). Measurement of Mixing-Controlled Reactive Transport in Homogeneous Porous Media and its Prediction from Conservative Tracer Test Data (No. 38). 7, Article 38.
  - BibTeX
  BibTeX
  @article{Surabin:2003, author = {Jose Chackiath, Surabhin and Cirpka, Olaf Arie}, month = {12}, note = {, IWS2ID=264 }, number = 38, page = {2089-2096}, publisher = {Environmental Science & Technology}, title = {Measurement of Mixing-Controlled Reactive Transport in Homogeneous Porous Media and its Prediction from Conservative Tracer Test Data}, volume = 7, year = 2004 }
2003
1. Neuweiler, I., Attinger, S., Kinzelbach, W., & King, P. (2003). Large scale mixing for immiscible displacement in heterogeneous porous media. 51.
  - BibTeX
  BibTeX
  @article{neuweiler2003large, author = {Neuweiler, Insa and Attinger, Sabine and Kinzelbach, Wolfgang and King, Peter}, month = {12}, note = {, IWS2ID=798 }, page = {287-314}, publisher = {Transport in Porous Media}, title = {Large scale mixing for immiscible displacement in heterogeneous porous media}, volume = 51, year = 2003 }
2. Nowak, W., Tenkleve, S., & Cirpka, O. A. (2003). Efficient Computation of Linearized Cross-Covariance and Auto-Covariance Matrices of Interdependent Quantities (No. 1). 35, Article 1. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Nowak_Tenkleve_Cirpka_2003MG_Spectral_Methods.pdf
  - BibTeX
  - Link
  BibTeX
  @article{Nowak2003, author = {Nowak, Wolfgang and Tenkleve, Sascha and Cirpka, Olaf Arie}, month = {12}, note = {, IWS2ID=197 }, number = 1, page = {53-66}, publisher = {Mathematical Geology}, title = {Efficient Computation of Linearized Cross-Covariance and Auto-Covariance Matrices of Interdependent Quantities}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Nowak_Tenkleve_Cirpka_2003MG_Spectral_Methods.pdf}, volume = 35, year = 2003 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Nowak_Tenkleve_Cirpka_2003MG_Spectral_Methods.pdf
3. Cirpka, O. A., & Nowak, W. (2003). Dispersion on kriged hydraulic conductivity fields (No. 2). 39, Article 2. https://doi.org/10.1029/2001WR000598
  - BibTeX
  - Link
  BibTeX
  @article{krig_disp, author = {Cirpka, Olaf Arie and Nowak, Wolfgang}, doi = {10.1029/2001WR000598}, month = {12}, note = {, IWS2ID=194 }, number = 2, page = {1027}, publisher = {Water Resources Research}, title = {Dispersion on kriged hydraulic conductivity fields}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Cirpka_Nowak_2003_Krig_Disp.pdf}, volume = 39, year = 2003 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Cirpka_Nowak_2003_Krig_Disp.pdf
4. Ochs, S. O., Hodges, R. A., Falta, R. W., Kmetz, T. F., Kupar, J. J., Brown, N. N., & Parkinson, D. L. (2003). Predicted Heating Patterns During Steam Flooding of Coastal Plain Sediments at the Savannah River Site. 1.
  - BibTeX
  BibTeX
  @article{Ochs:2003, author = {Ochs, Steffen Oliver and Hodges, Rex A. and Falta, Ron W. and Kmetz, Thomas F. and Kupar, James J. and Brown, Norman N. and Parkinson, David L.}, month = {02}, note = {, IWS2ID=193 }, page = {51-69}, publisher = {Environmental & Engineering Geoscience}, title = {Predicted Heating Patterns During Steam Flooding of Coastal Plain Sediments at the Savannah River Site}, volume = 1, year = 2003 }
5. Neuweiler, I., Sorensen, I., & Kinzelbach, W. (2003). Impact of correlation structure on drainage in open rough-walled fractures (No. 3). 1, Article 3.
  - BibTeX
  BibTeX
  @article{neuweiler2003impact, author = {Neuweiler, Insa and Sorensen, Ivan and Kinzelbach, Wolfgang}, month = {12}, note = {, IWS2ID=1202 }, number = 3, page = {28-31}, publisher = {Applied Mathematic and Mechanic}, title = {Impact of correlation structure on drainage in open rough-walled fractures}, volume = 1, year = 2003 }
6. Cirpka, O. A., & Attinger, S. (2003). Effective Dispersion in Heterogeneous Media under Random Transient Flow Conditions (No. 9). 39, Article 9. https://doi.org/10.1029/2002WR001931
  - BibTeX
  BibTeX
  @article{transdiss, author = {Cirpka, Olaf Arie and Attinger, Sabine}, doi = {10.1029/2002WR001931}, month = {12}, note = {, IWS2ID=199 }, number = 9, page = {1257}, publisher = {Water Resources Research}, title = {Effective Dispersion in Heterogeneous Media under Random Transient Flow Conditions}, volume = 39, year = 2003 }
2002
1. Class, H., & Helmig, R. (2002). Numerical simulation of nonisothermal multiphase multicomponent processes in porous media - 2. Applications for the injection of steam and air (No. 5). 25, Article 5. https://doi.org/10.1016/S0309-1708(02)00015-5
  - BibTeX
  BibTeX
  @article{Class:2002b, author = {Class, Holger and Helmig, Rainer}, doi = {10.1016/S0309-1708(02)00015-5}, month = {12}, note = {, IWS2ID=132 }, number = 5, page = {551-564}, publisher = {Advances in Water Resources}, title = {Numerical simulation of nonisothermal multiphase multicomponent processes in porous media - 2. Applications for the injection of steam and air}, volume = 25, year = 2002 }
2. Class, H., Helmig, R., & Bastian, P. (2002). Numerical simulation of nonisothermal multiphase multicomponent processes in porous media - 1. An efficient solution technique (No. 5). 25, Article 5. https://doi.org/10.1016/S0309-1708(02)00014-3
  - BibTeX
  BibTeX
  @article{Class:2002a, author = {Class, Holger and Helmig, Rainer and Bastian, Peter}, doi = {10.1016/S0309-1708(02)00014-3}, month = {12}, note = {, IWS2ID=131 }, number = 5, page = {533-550}, publisher = {Advances in Water Resources}, title = {Numerical simulation of nonisothermal multiphase multicomponent processes in porous media - 1. An efficient solution technique}, volume = 25, year = 2002 }
3. Cirpka, O. A. (2002). Choice of Dispersion Coefficients in Reactive Transport Calculations on Smoothed Fields (No. 03_04). 58, Article 03_04.
  - BibTeX
  BibTeX
  @article{smoothreac, author = {Cirpka, Olaf Arie}, month = {12}, note = {, IWS2ID=200 }, number = {03_04}, page = {261-282}, publisher = {Journal of Contaminant Hydrology}, title = {Choice of Dispersion Coefficients in Reactive Transport Calculations on Smoothed Fields}, volume = 58, year = 2002 }
4. King, P., & Neuweiler, I. (2002). Probability upscaling. 6.
  - BibTeX
  BibTeX
  @article{king2002probability, author = {King, Peter and Neuweiler, Insa}, month = {12}, note = {, IWS2ID=799 }, page = {101-114}, publisher = {Computational Geosciences}, title = {Probability upscaling}, volume = 6, year = 2002 }
5. Burchardi, F., & Memminger, B. (2002). Monetarisierung von umweltrelevanten Sachverhalten bei der Verkehrswertermittlung eines aktiven Produktionsstandortes - ein Praxisfall (No. 4). Article 4.
  - BibTeX
  BibTeX
  @article{burchardi2002monetarisierung, author = {Burchardi, Frank and Memminger, Birgit}, month = {12}, note = {, IWS2ID=1065 , Address: Berlin }, number = 4, page = {165-174}, publisher = {Altlasten Spektrum (Ingenieurtechnischer Verband Altlasten e.V.)}, title = {Monetarisierung von umweltrelevanten Sachverhalten bei der Verkehrswertermittlung eines aktiven Produktionsstandortes - ein Praxisfall}, year = 2002 }
6. Cirpka, O. A., & Kitanidis, P. K. (2002). Numerical evaluation of solute dispersion and dilution in unsaturated heterogeneous media (No. 11). 38, Article 11. https://doi.org/10.1029/2001WR001262
  - BibTeX
  BibTeX
  @article{unsat, author = {Cirpka, Olaf Arie and Kitanidis, Peter K.}, doi = {10.1029/2001WR001262}, month = {12}, note = {, IWS2ID=201 , Partnerinstitution: Stanford University, Department of Civil & Environmental Engineering , Partneraddress: Stanford, California, USA }, number = 11, page = {1220}, publisher = {Water Resources Research}, title = {Numerical evaluation of solute dispersion and dilution in unsaturated heterogeneous media}, volume = 38, year = 2002 }
2001
1. Neuweiler, I., Attinger, S., & Kinzelbach, W. (2001). Macrodispersion in a radially diverging flow field with finite Peclet numbers, 1.: Perturbation theory approach (No. 3). 37, Article 3.
  - BibTeX
  BibTeX
  @article{neuweiler2001macrodispersion, author = {Neuweiler, Insa and Attinger, Sabine and Kinzelbach, Wolfgang}, month = {12}, note = {, IWS2ID=800 }, number = 3, page = {481-493}, publisher = {Water Resources Research}, title = {Macrodispersion in a radially diverging flow field with finite Peclet numbers, 1.: Perturbation theory approach}, volume = 37, year = 2001 }
2. Attinger, S., Neuweiler, I., & Kinzelbach, W. (2001). Macrodispersion in a radially diverging flow field with finite Peclet numbers, 2.: Homogenization theory approach (No. 3). 37, Article 3.
  - BibTeX
  BibTeX
  @article{attinger2001macrodispersion, author = {Attinger, Sabine and Neuweiler, Insa and Kinzelbach, Wolfgang}, month = {12}, note = {, IWS2ID=801 }, number = 3, page = {495-505}, publisher = {Water Resources Research}, title = {Macrodispersion in a radially diverging flow field with finite Peclet numbers, 2.: Homogenization theory approach}, volume = 37, year = 2001 }
3. Cirpka, O. A., & Kitanidis, P. K. (2001). Theoretical basis for the measurement of local transverse dispersion in isotropic porous media (No. 2). 37, Article 2.
  - BibTeX
  BibTeX
  @article{ringmom1, author = {Cirpka, Olaf Arie and Kitanidis, Peter K.}, month = {12}, note = {, IWS2ID=205 , Partnerinstitution: Stanford University, Department of Civil & Environmental Engineering , Partneraddress: Stanford, California, USA }, number = 2, page = {243-252}, publisher = {Water Resources Research}, title = {Theoretical basis for the measurement of local transverse dispersion in isotropic porous media}, volume = 37, year = 2001 }
4. Cirpka, O. A., & Kitanidis, P. K. (2001). Transport of volatile compounds in porous media in the presence of a trapped gas phase (No. 03_04). 49, Article 03_04.
  - BibTeX
  BibTeX
  @article{gaspart, author = {Cirpka, Olaf Arie and Kitanidis, Peter K.}, month = {12}, note = {, IWS2ID=204 , Partnerinstitution: Stanford University, Department of Civil & Environmental Engineering , Partneraddress: Stanford, California, USA }, number = {03_04}, page = {263-285}, publisher = {Journal of Contaminant Hydrology}, title = {Transport of volatile compounds in porous media in the presence of a trapped gas phase}, volume = 49, year = 2001 }
5. Schlicher, T., Schrenk, V., & Barczewski, B. (2001). Projekt “EDV Tool”. Entwicklung einer EDV gestützten Bewertungsmatrix und Datenbank zur Ableitung übertragbarer Kriterien für ein systematisiertes Flächenrecycling in Baden Württemberg (BWC 99003).
  - BibTeX
  BibTeX
  @article{schlicher2001projekt, author = {Schlicher, Thomas and Schrenk, Volker and Barczewski, Baldur}, month = {02}, note = {, IWS2ID=622 , Address: Karlsruhe }, page = {28-32}, publisher = {Altlasten und Bodennews}, title = {Projekt "EDV Tool". Entwicklung einer EDV gestützten Bewertungsmatrix und Datenbank zur Ableitung übertragbarer Kriterien für ein systematisiertes Flächenrecycling in Baden Württemberg (BWC 99003)}, year = 2001 }
6. Schrenk, V., Schlicher, T., & Barczewski, B. (2001). Arbeitsgruppe FIGURA stellt sich vor. Flächenrecycling, Industriebrachen, Grundwasserschutz - Umweltgerechte Revitalisierung von Altstandorten.
  - BibTeX
  BibTeX
  @article{schrenk2001arbeitsgruppe, author = {Schrenk, Volker and Schlicher, Thomas and Barczewski, Baldur}, month = {02}, note = {, IWS2ID=627 , Address: Karlsruhe }, page = {10--14}, publisher = {Altlasten und Bodennews}, title = {Arbeitsgruppe FIGURA stellt sich vor. Flächenrecycling, Industriebrachen, Grundwasserschutz - Umweltgerechte Revitalisierung von Altstandorten}, year = 2001 }
7. Cirpka, O. A., & Kitanidis, P. K. (2001). Travel-time based model of bioremediation using circulation wells (No. 3). 39, Article 3.
  - BibTeX
  BibTeX
  @article{circwell, author = {Cirpka, Olaf Arie and Kitanidis, Peter K.}, month = {12}, note = {, IWS2ID=202 , Partnerinstitution: Stanford University, Department of Civil & Environmental Engineering , Partneraddress: Stanford, California, USA }, number = 3, page = {422-432}, publisher = {Ground Water}, title = {Travel-time based model of bioremediation using circulation wells}, volume = 39, year = 2001 }
8. Kobus, H. (2001). Forschungsbericht 1994 - 2002 des Lehrstuhls für Hydraulik und Grundwasser.
  - BibTeX
  BibTeX
  @article{kobus2001forschungsbericht, author = {Kobus, Helmut}, editor = {Kobus, H.}, month = {11}, note = {, IWS2ID=426 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, title = {Forschungsbericht 1994 - 2002 des Lehrstuhls für Hydraulik und Grundwasser}, type = {Bericht}, year = 2001 }
9. Schrenk, V., Schlicher, T., & Barczewski, B. (2001). Interdisciplinary Research Activities in Brownfield Redevelopment in the Federal State of Baden Württemberg, Germany. Brownfields 2001.
  - BibTeX
  BibTeX
  @article{schrenk2001interdisciplinary, author = {Schrenk, Volker and Schlicher, Thomas and Barczewski, Baldur}, booktitle = {Brownfields 2001}, month = {12}, note = {, IWS2ID=628 , Address: Chicago, USA }, title = {Interdisciplinary Research Activities in Brownfield Redevelopment in the Federal State of Baden Württemberg, Germany}, year = 2001 }
2000
1. Barczewski, B., Batereau, K., Juckenack, C. C., Klaas, N., Schlicher, T., & Schrenk, V. (2000). Strukturierung von Flächenrecycling in Baden-Württemberg. Erste Vorhaben des Projektverbundes FIGURA starten.
  - BibTeX
  BibTeX
  @article{barczewski2000strukturierung, author = {Barczewski, Baldur and Batereau, Katrin and Juckenack, Christian C. and Klaas, Norbert and Schlicher, Thomas and Schrenk, Volker}, month = {02}, note = {, IWS2ID=610 , Address: Mainz }, page = {48-53}, publisher = {Terra Tech (Zeitschrift für Altlasten und Bodenschutz)}, title = {Strukturierung von Flächenrecycling in Baden-Württemberg. Erste Vorhaben des Projektverbundes FIGURA starten}, year = 2000 }
2. Juckenack, C. C., Barczewski, B., & Schrenk, V. (2000). Flächenressourcen-Management in Baden-Württemberg (No. 5). Article 5.
  - BibTeX
  BibTeX
  @article{juckenack2000flchenressourcenmanagement, author = {Juckenack, Christian C. and Barczewski, Baldur and Schrenk, Volker}, month = {12}, note = {, IWS2ID=621 , Address: Berlin }, number = 5, page = {257-258}, publisher = {Altlasten Spektrum (Ingenieurtechnischer Verband Altlasten e.V.)}, title = {Flächenressourcen-Management in Baden-Württemberg}, type = {Editorial}, year = 2000 }
3. Cirpka, O. A., & Kitanidis, P. K. (2000). Sensitivities of temporal moments calculated by the adjoint-state method and joint inversing of head and tracer data (No. 1). 24, Article 1.
  - BibTeX
  BibTeX
  @article{invmom, author = {Cirpka, Olaf Arie and Kitanidis, Peter K.}, month = {12}, note = {, IWS2ID=208 , Partnerinstitution: Stanford University, Department of Civil & Environmental Engineering , Partneraddress: Stanford, California, USA }, number = 1, page = {89-103}, publisher = {Advances in Water Resources}, title = {Sensitivities of temporal moments calculated by the adjoint-state method and joint inversing of head and tracer data}, volume = 24, year = 2000 }
4. Juckenack, C. C., Barczewski, B., & Schrenk, V. (2000). Recycling Derelict Land and Site Management in Agglomerations - the Cooperative FIGURA.
  - BibTeX
  BibTeX
  @article{juckenack2000recycling, author = {Juckenack, Christian C. and Barczewski, Baldur and Schrenk, Volker}, month = {12}, note = {, IWS2ID=619 }, title = {Recycling Derelict Land and Site Management in Agglomerations - the Cooperative FIGURA.}, year = 2000 }
5. Cirpka, O. A., & Kitanidis, P. K. (2000). Impact of Biomass-Decay Terms on the Simulation of Pulsed Bioremediation (No. 2). 38, Article 2.
  - BibTeX
  BibTeX
  @article{Cirpka2000a, author = {Cirpka, Olaf Arie and Kitanidis, Peter K.}, month = {12}, note = {, IWS2ID=207 , Partnerinstitution: Stanford University, Department of Civil & Environmental Engineering , Partneraddress: Stanford, California, USA }, number = 2, page = {254-263}, publisher = {Ground Water}, title = {Impact of Biomass-Decay Terms on the Simulation of Pulsed Bioremediation}, volume = 38, year = 2000 }
6. Cirpka, O. A., & Kitanidis, P. K. (2000). An advective-dispersive streamtube approach for the transfer of conservative tracer data to reactive transport (No. 5). 36, Article 5.
  - BibTeX
  BibTeX
  @article{tempmom_reac, author = {Cirpka, Olaf Arie and Kitanidis, Peter K.}, month = {12}, note = {, IWS2ID=210 , Partnerinstitution: Stanford University, Department of Civil & Environmental Engineering , Partneraddress: Stanford, California, USA }, number = 5, page = {1209-1220}, publisher = {Water Resources Research}, title = {An advective-dispersive streamtube approach for the transfer of conservative tracer data to reactive transport}, volume = 36, year = 2000 }
7. Cirpka, O. A., & Kitanidis, P. K. (2000). Characterization of mixing and dilution in heterogeneous aquifers by means of local temporal moments (No. 5). 36, Article 5.
  - BibTeX
  BibTeX
  @article{tempmom_cons, author = {Cirpka, Olaf Arie and Kitanidis, Peter K.}, month = {12}, note = {, IWS2ID=209 , Partnerinstitution: Stanford University, Department of Civil & Environmental Engineering , Partneraddress: Stanford, California, USA }, number = 5, page = {1221-1236}, publisher = {Water Resources Research}, title = {Characterization of mixing and dilution in heterogeneous aquifers by means of local temporal moments}, volume = 36, year = 2000 }
1999
1. Schrenk, V., & Juckenack, C. C. (1999). Flächenrecycling in Baden-Württemberg. Foschungsprojekte der Arbeitsgruppe FIGURA gestartet.
  - BibTeX
  BibTeX
  @article{schrenk1999flchenrecycling, author = {Schrenk, Volker and Juckenack, Christian C.}, month = {04}, note = {, IWS2ID=623 , Address: Karlsruhe }, page = {191-193}, publisher = {Altlasten und Bodennews}, title = {Flächenrecycling in Baden-Württemberg. Foschungsprojekte der Arbeitsgruppe FIGURA gestartet}, year = 1999 }
2. Cirpka, O. A., Windfuhr, C., Bisch, G., Granzow, S., Scholz-Muramatsu, H., & Kobus, H. (1999). Microbial Reductive Dechlorination in Large-Scale Sandbox Model (No. 9). 125, Article 9.
  - BibTeX
  BibTeX
  @article{Cirpka:1999, author = {Cirpka, Olaf Arie and Windfuhr, Claudia and Bisch, Gerhard and Granzow, Silke and Scholz-Muramatsu, Heidrun and Kobus, Helmut}, month = {12}, note = {, IWS2ID=211 }, number = 9, page = {861-870}, publisher = {ASCE Journal of Environmental Engineering}, title = {Microbial Reductive Dechlorination in Large-Scale Sandbox Model}, volume = 125, year = 1999 }
3. Juckenack, C. C., Barczewski, B., & Schrenk, V. (1999). Flächenrecycling und Flächenmanagement in Ballungsräumen. Ein Ansatz zur Strukturierung: der Projektverbund “FIGURA” in Baden-Württemberg (No. 5). Article 5.
  - BibTeX
  BibTeX
  @article{juckenack1999flchenrecycling, author = {Juckenack, Christian C. and Barczewski, Baldur and Schrenk, Volker}, month = {12}, note = {, IWS2ID=616 , Address: Mainz }, number = 5, page = {50-53}, publisher = {Terra Tech (Zeitschrift für Altlasten und Bodenschutz)}, title = {Flächenrecycling und Flächenmanagement in Ballungsräumen. Ein Ansatz zur Strukturierung: der Projektverbund "FIGURA" in Baden-Württemberg}, year = 1999 }
4. Schulz, V., Bárdossy, A., & Helmig, R. (1999). Conditional statistical inverse modeling in groundwater flow by multigrid methods (No. 1). 3, Article 1.
  - BibTeX
  BibTeX
  @article{Schulz:1998, author = {Schulz, Volker and Bárdossy, András and Helmig, Rainer}, month = {12}, note = {, IWS2ID=95 }, number = 1, page = {49-68}, publisher = {Computational Geosciences}, title = {Conditional statistical inverse modeling in groundwater flow by multigrid methods}, volume = 3, year = 1999 }
5. Cirpka, O. A., Frind, E. O., & Helmig, R. (1999). Streamline-oriented grid-generation of transport modelling in two-dimensional domains including wells (No. 7). 22, Article 7. https://doi.org/10.1016/S0309-1708(98)00050-5
  - BibTeX
  BibTeX
  @article{Cirpka:1999a, author = {Cirpka, Olaf Arie and Frind, Emil O. and Helmig, Rainer}, doi = {10.1016/S0309-1708(98)00050-5}, month = {12}, note = {, IWS2ID=100 }, number = 7, page = {697-710}, publisher = {Advances in Water Resources}, title = {Streamline-oriented grid-generation of transport modelling in two-dimensional domains including wells}, volume = 22, year = 1999 }
6. Metzger, D., Kinzelbach, H., Neuweiler, I., & Kinzelbach, W. (1999). Asymptotic transport parameters in a heterogeneous porous medium: Comparison of two ensemble-averaging procedures. 13.
  - BibTeX
  BibTeX
  @article{metzger1999asymptotic, author = {Metzger, Dirk and Kinzelbach, Harald and Neuweiler, Insa and Kinzelbach, Wolfgang}, month = {12}, note = {, IWS2ID=802 }, page = {396-415}, publisher = {Stochastic Environmental Research and Risk Assessment}, title = {Asymptotic transport parameters in a heterogeneous porous medium: Comparison of two ensemble-averaging procedures}, volume = 13, year = 1999 }
7. Cirpka, O. A., Frind, E. O., & Helmig, R. (1999). Numerical simulation of biodegradation controlled by transverse mixing (No. 2). 40, Article 2. https://doi.org/10.1016/S0169-7722(99)00044-3
  - BibTeX
  BibTeX
  @article{Cirpka:1999c, author = {Cirpka, Olaf Arie and Frind, Emil O. and Helmig, Rainer}, doi = {10.1016/S0169-7722(99)00044-3}, month = {12}, note = {, IWS2ID=102 }, number = 2, page = {159-182}, publisher = {Journal of Contaminant Hydrology}, title = {Numerical simulation of biodegradation controlled by transverse mixing}, volume = 40, year = 1999 }
8. Cirpka, O. A., Helmig, R., & Frind, E. O. (1999). Numerical methods for reactive transport on rectangular and streamline-oriented grids (No. 7). 22, Article 7. https://doi.org/10.1016/S0309-1708(98)00051-7
  - BibTeX
  BibTeX
  @article{Cirpka:1999b, author = {Cirpka, Olaf Arie and Helmig, Rainer and Frind, Emil O.}, doi = {10.1016/S0309-1708(98)00051-7}, month = {12}, note = {, IWS2ID=101 }, number = 7, page = {711-728}, publisher = {Advances in Water Resources}, title = {Numerical methods for reactive transport on rectangular and streamline-oriented grids}, volume = 22, year = 1999 }
1998
1. Helmig, R., Class, H., Färber, A., & Emmert, M. (1998). Heat transport in the unsaturated zone - comparison of experimental results and numerical simulations (No. 6). 36, Article 6.
  - BibTeX
  BibTeX
  @article{Helmig:1998c, author = {Helmig, Rainer and Class, Holger and Färber, Arne and Emmert, Martin}, month = {12}, note = {, IWS2ID=83 }, number = 6, page = {933-962}, publisher = {Journal of Hydraulic Research}, title = {Heat transport in the unsaturated zone - comparison of experimental results and numerical simulations}, volume = 36, year = 1998 }

Student Assignments Supervised at the LH2

2023
1. Investigation of the influence of heterogeneities on evaporation-driven density instabilities for two-phase flow. (2023). (Bachelorarbeit).
2. Untersuchung naturnaher Flockungshilfsmittel als Alternative zu Polyacrylamid bei der Trinkwasseraufbereitung unter Berücksichtigung des Wiederverkeimungspotentials. (2023). (Masterarbeit).
2022
1. Analysis of the Stefan flow problem and comparison to an advection-diffusion formulation. (2022). (Masterarbeit).
2. Thermodynamic Analysis of Carbon Dioxide Mass Transport in a Stagnant Water Column. (2022). (Bachelorarbeit).
3. Coupled Turbulent Free- and Porous Media Flows: Investigations of Interfacial Roughness. (2022). (mastersthesis).
4. Numerical Modeling of Biocement Production. (2022). (Masterarbeit).
5. Coupling between a detailed model and a large-scale model for exchanging density-dependent salt fluxes. (2022). (Masterarbeit).
6. Combining a monolithic implementation of a locally-refined finite-volume staggered-grid method for the incompressible Navier-Stokes equations with an implementation of a SIMPLE-type solution algorithm. (2022). (Bachelorarbeit und Propädeutikum).
7. Modeling of mechanical response to microbially induced calcite precipitation in porous media. (2022). (Masterarbeit).
8. Untersuchung einer modifizierten Allen-Cahn-Gleichung ohne krümmungsbedingte Bewegung. (2022). (Bachelorarbeit).
9. Biofilm-Visualisierung in mikrofluidischen Zellen. (2022). (Bachelorarbeit).
10. Coupled Free-Flow and Porous Media Flow Systems: Analysis of Turbulent Free-Flow Condtions and Pore-Network Models. (2022). (Forschungsmodul2).
11. Accurate Flow Boundary Conditions for the Lattice Boltzmann Method. (2022). (Masterarbeit).
12. Modeling the use of microbially induced calcite precipitation for road construction. (2022). (Masterarbeit).
13. Numerische Simulation des wärmegekoppelten Stofftransports durch die Speicherhülle eines Erdbeckenspeichers. (2022). (Masterarbeit).
14. Coupled flow, transport, and geochemical processes in karstic fractures. (2022). (Masterarbeit).
2021
1. Modeling calcite dissolution due to density-induced fingering of CO2-enriched water. (2021). (Master’s Thesis).
2. Transport Properties from Entropy Scaling using PC-SAFT Equation of State for the Modelling of Subsurface Hydrogen Storage. (2021). (Masterarbeit). Universität Stuttgart.
3. SIMPLE-type methods for iteratively solving the Navier-Stokes equations. (2021). (Forschungsmodul 1). Universität Stuttgart.
4. Modelling Turbulence in Coupled Environments: The K-Shear Stress Transport Model. (2021). (Master’s Thesis).
5. Averaged Analysis of Pore Scale Dynamics via Closure Problems. (2021). (Forschungsmodul 2).
6. Linear stability analysis for an evaporation problem of a porous slab. (2021). (Bachelorarbeit).
7. Herleitung reduzierter Modelle einer Zweiphasenströmung zwischen parallelen Platten mit Slip-Bedingungen. (2021). (Projektarbeit).
8. Density-driven dissolution of CO2 in karst water - longterm monitoring and modelling in a water column. (2021). (Masterarbeit).
9. Die Finite-Volumen-Methode am Beispiel der Konvektions-Diffusions-Gleichung. (2021). (Seminararbeit).
10. Flow in diffusive transition zones. (2021). (Projektarbeit).
11. Vergleich des Lösens der Navier-Stokes Gleichungen auf lokal verfeinerten versetzten Gittern in den Softwarepakete DuMux und IBAMR. (2021). (Projektarbeit).
12. Modellierung von Deponien mit schwach radioaktivem Material. (2021). (Bachelorarbeit).
13. A 0-dimensional conceptual model to facilitate coupling of groundwater and surface-water numerical models - and its application to a bog-wetland study area. (2021). (Masterarbeit).
14. Implementing and testing a standard black oil model in Dumux. (2021). (Masterarbeit).
15. Discretizing free flow coupled to porous-medium flow by a locally-refined finite-volume staggered-grid method using an interface with refined pressures and coarse velocities. (2021). (Masterarbeit).
16. Experimental Investigation on the Impact of Induced Calcite Precipitation on Two-Phase Flow. (2021). (Bachalorarbeit).
17. Experimentelle Untersuchung von induzerter Calcitausfällung. (2021). (Master’s Thesis).
18. Numerical study on the modelling of macropores. (2021). (Master Thesis).
19. Modeling of temperature-dependent mineral precipitation and dissolution in porous media. (2021). (Forschungsmodul).
20. Experimentelle Untersuchung von mikrobiologisch induzierter Kalkausfällung in mikrofluidischen Zellen. (2021). (Bachalorarbeit).
21. Investigation of linear solvers and preconditioners for sparse systems resulting from free-flow applications. (2021). (Masterarbeit).
2020
1. Grundlagenuntersuchung zum saugseitigen Filter im DNOX-Fördermodul. (2020). (Masterarbeit).
2. Untersuchung von Rissstrukturen bei der thermochemischen Wärmespeicherung mit CaO/Ca(OH)2. (2020). (Bachelorarbeit).
3. Numerical investigation of fracture dilation processes in radioactive waste storage sites. (2020). (Masterarbeit). Universität Stuttgart.
4. Entwicklung eines Stoffmodells für Wasserstoff unter überkritischen Bedingungen zur Analyse von Wasserstoffspeicherung im Untergrund. (2020). (Bachalorarbeit).
5. Combination of a locally-refined quadtree finite-volume staggered grid scheme for the Navier-Stokes equation with turbulence models. (2020). (Forschungsmodul 2).
6. Effective heat transfer models in thin porous media. (2020). (Bachelorarbeit).
7. Untersuchung des lokalen thermischen Nicht-Gleichgewichts bei der thermochemischen Wärmespeicherung. (2020). (Projektarbeit). Universität Stuttgart.
8. Mixed-dimension coupling methods with distributed sources for two phase flow problems in porous media. (2020). (Masterarbeit).
9. Extension of a locally-refined quadtree finite-volume staggered-grid scheme to a drop-on-wall geometry. (2020). (Forschungsmodul 1).
10. Kalibrierung eines realistischen Grundwassermodells mit FEPEST. (2020). (Masterarbeit).
2019
1. A fully implicit formulation for Navier-Stokes/Darcy coupling. (2019). (Masterthesis). Retrieved from https://www.politesi.polimi.it/bitstream/10589/146077/1/2019_04_Vescovini.pdf
2. Vergleich von Mehrkomponentendiffusionsansätzen im Kontext der Anwendung auf Brennstoffzellen. (2019). (bachelor thesis).
3. Theorie und Erfahrung mit dem Gmsh Generator. (2019). (Seminararbeit).
4. Instability analysis for salt precipitation processes in unsaturated porous media. (2019). (Bachelorarbeit).
5. Numerische Simulation von Konvektion durch in Wasser gelöstes CO2. (2019). (Bachelorarbeit).
6. Modelling of Isotope Transport and Evaporation Rates at the Porous Medium Free-Flow Interface. (2019). (Masterarbeit).
7. Modelling and Simulation of the Thermal Utilization of Shallow Groundwater. (2019). (Masterarbeit).
8. Examination of Mass Transfer Effects in Redox Flow Batteries by means of Analytical Modelling. (2019). (Masterarbeit).
9. Numerische Ermittlung der Ergiebigkeit von Brunnen unter Berücksichtigung der Forchheimer-Gleichung und Darstellung der Ergebnisse in dimensionsloser Form / Numerical simulation of well yield using the forchheimer equation and presentation of the results by dimensionless numbers. (2019). (Masterarbeit).
10. Quantifying similarities between computational expensive reactive transport models. (2019). (Bachelorarbeit).
11. Pore and pore-network scale modeling on realistic geometries extracted from CT images. (2019). (Masterarbeit).
12. Sensitivitätsanalyse eines reaktiven Transportmodells. (2019). (Projektarbeit).
13. A dual pore-network model for fluid and energy transport in soils considering thermal non-equilibrium. (2019). (Masterarbeit).
14. Decoupled solution of flow, transport and reactions for microbially enhanced coal bed methane scenarios. (2019). (Masterarbeit).
15. Development of interface criteria for model reduction strategies for the simulation of hydrogen storage. (2019). (Masterarbeit). Universität Stuttgart.
16. Sensitivitätsanalyse für ein Modell zur mikrobiell erhöhten Methanproduktion in Kohleflözen. (2019). (Bacherlorarbeit).
17. Implementierung eines numerischen Modells für den Transport von Tracerkomponenten in Zweiphasenströmungen. (2019). (Studienarbeit).
18. Non-isothermal effects in Compressed Air Energy Storage systems. (2019). (Masterarbeit).
19. Experimental and numerical investigation of tracer transport in porous media on the pore scale. (2019). (Masterarbeit).
2018
1. Investigation of the Streamline-Upwind Petrov-Galerkin method for the Navier-Stokes equations. (2018). (Bachelorarbeit). 0.
2. Kopplung zwischen freier Strömung und Strömung im porösen Medium: Modellierung des Transportes von Metallen und Kolloiden in der hyporheischen Zone. (2018). (Bachelorarbeit).
3. Modelling of salt precipitation and comparison with experimental results. (2018). (Masterthesis).
4. Implementation of a finite element discretization for Stokes problems in DuMux. (2018). (Propaedeuticum).
5. Machbarkeit und Effizienz von Pumpspeicherung im Untergrund. (2018). (Studienarbeit).
6. Berechnung der Öffnungsweite bei Zugversagen mit Hilfe eines analytischen Ansatzes. (2018). (Bachelorarbeit).
7. Thermodynamische Analyse einer CAES-Anlage - mit Fokus auf analytischer Approximation. (2018). (Bachelorarbeit).
8. Upscaling von kapillaren Netzwerkstrukturen. (2018). (Masterthesis).
9. Modelling hydrodynamic dispersion under two-phase flow conditions. (2018). (Masterarbeit).
10. Experimentelle Visualisierung von Konvektion durch in Wasser gelöstes CO2. (2018). Universität Stuttgart.
11. Pumpversuche zur Bestimmung hydrogeologischer Parameter. (2018). (Bachelorarbeit).
12. Parameterization of element balance formulation in reactive compositional flow and transport. (2018). (Masterarbeit). TU Delft.
13. Modeling fractures in a CaO/Ca(OH)2 thermo-chemical heat storage reactor. (2018). (Masterthesis).
14. Investigating turbulence in an indirect thermo-chemical heat storage reactor. (2018). (Bachelorarbeit).
15. Investigation of different coupling schemes for hybrid-dimensional models. (2018). (Masterthesis).
16. Numerical simulations of underground carbon dioxide storage with hydrogen impurities. (2018). (Masterthesis).
17. Analyse der Möglichkeiten von Energiespeicherung durch Unterwasserdruckluftspeicherkraftwerke. (2018). (Bachelorarbeit).
18. Experimental and numerical investigation of enzymatically induced calcite precipitation in porous media. (2018). (Masterthesis).
19. Implementation of Adsorption Isotherms in the numerical simulator DuMuX. (2018). (Studienarbeit).
20. Modellierung und Simulation von Vaskulogenese und Angiogenese. (2018). (Studienarbeit).
21. Modeling heat transfer between porous medium and free flow. (2018). (Projektarbeit).
22. Analyse der Möglichkeiten von Energiespeicherung durch Windkraftanlagenpumpspeicherkraftwerke. (2018). (Bachelorarbeit).
23. Dichtegetriebene Strömung durch Einlösen von CO2 in Wasser. (2018). (Bachelorarbeit).
24. Parametersensitivitätsstudie für ein biogeochemisches Goldkreislaufmodell. (2018). (Bachelorarbeit).
2017
1. Ansätze zur Kopplung von Grundwasser- und Fließgewässermodellen - Vergleich von Softwarelösungen. (2017). (Masterthesis).
2. Abschätzung von Möglichkeiten der Wärmegewinnung aus Grundwasser und Entwicklung eines Programms für eine Parameterstudie. (2017). (Bachelorarbeit).
3. Comparison of the use of hydrogen and methane for underground energy storage. (2017). (Bachelorarbeit).
4. Bayesian model selection for hydro-morphodynamic models. (2017). (Masterthesis).
5. Analyse der Möglichkeiten von Energiespeicherung durch Hochhauspumpspeicherkraftwerke. (2017). (Bachelorarbeit).
6. Development of a Numerical Model for Microbial Precipitation of Metallic Gold. (2017). (Masterthesis).
7. Lumped parameter models for the human cardiovascular system. (2017). (Masterthesis).
8. Erstellung eines Programms zur Auslegung von Rohrnetzwerken in der Wasserversorgung. (2017). (Bachelorarbeit). Universität Stuttgart.
9. Parameterstudie zur Charakterisierung verschiedener Bodenarten für Poren-Netzwerk-Modelle. (2017). (Bachelorarbeit).
10. Auslegung einer Gebäudeheizung mit einem thermochemischen Wärmespeicher. (2017). (Bachelorarbeit).
11. Simulation of Blood Flow through a Bifurcation at capillary level by 3D and 1D models. (2017). (Bachelorarbeit).
12. Convergence analysis of two-phase flow systems in porous media: Comparison of implicit hybrid upwinding and phase potential upwinding. (2017). (Bachelorarbeit).
13. Numerical investigation of turbulent flow around obstacles and evaporating porous media. (2017). (Masterthesis).
14. Investigation of parametrization of dual-continuum models through multi-scale finite volume methods. (2017). (Masterthesis).
15. Investigation of the SUPG method: Concept and 1-d implementation. (2017). (Projektarbeit).
16. Modellierung des diffusiven Methantransports im Zusammenhang mit Hydraulic Fracturing. (2017). (Bachelorarbeit).
17. Modelling of intra- and extracellular flow and transport processes. (2017). (Masterthesis).
18. Modeling microbially enhanced coal-bed methane production. (2017). (Masterthesis).
19. Entwicklung eines Programms zur Auslegung eines hydraulischen Widders. (2017). (Bachelorarbeit).
20. Modellierung und experimentelle Untersuchung des Stoffsystems SrBr2/H2O zur thermochemischen Energiespeicherung. (2017). (Masterthesis).
2016
1. Numerical Simulations to Reproduce Experiments on Capillary Liquid Uptake in Core Samples. (2016). (Masterthesis).
2. Algorithmus zur Zeitschrittweitenanpassung für das linear elastische Modell. (2016). (Bachelorarbeit).
3. Development of 1D and 3D DuMuX models to simulate transport of nano zero-valent iron particles in porous media. (2016). (Masterthesis).
4. Development of a numerical model for thermal-ureolysis-induced calcite precipitation. (2016). (Masterthesis).
5. Effizienz von Druckluftspeicherung in porösen geologischen Formationen. (2016). (Bachelorarbeit).
6. Experimentelle Untersuchung der effektiven Gaspermeabilität von feinen Schüttungen. (2016). (Bachelorarbeit).
7. Analyse eines modifizierten, vertikal integrierten Modells. (2016). (Bachelorarbeit).
8. Modellierung des Strömungsübergangs am porösen Medium für Filterelemente. (2016). (Masterthesis).
9. Investigation of a nonlinear Multi-Point Flux Approximation in DuMuX. (2016). (Forschungsmodul).
10. Numerical and experimental investigation of soil-root interactions. (2016). (Masterthesis).
11. Untersuchung und Weiterentwicklung der in DuMuX implementierten Flachwassergleichungen. (2016). (Bachelorarbeit).
12. Entwicklung von Kopplungskriterien zur adaptiven Bestimmung des VE-Bereichs in einem gekoppelten Modell. (2016). (Bachelorarbeit).
13. Modeling the espresso brewing process using a non-isothermal, compositional two-phase approach with dissolution kinetics. (2016). (Masterthesis).
14. Development and Evaluation of Iterative Solution Strategies for Coupled Stokes-Darcy Problems. (2016). (Masterthesis).
2015
1. Charakterisierung, Auswahl und Untersuchung von Spacern für die Membrandestillation. (2015). (Masterthesis).
2. Numerical modeling of salt precipitation around gas wells and its influence on the methane extraction rates. (2015). (Independent-Study).
3. Numerical Modeling of Peripheral Arterial Stenoses and Evaluation of Compensation Mechanisms. (2015). (Masterthesis).
4. Comparison of different methods for solving elliptic pressure equations in heterogeneous anisotropic porous media. (2015). (Bachelorarbeit).
5. Untersuchungen zu Möglichkeiten der Wärmespeicherung bei der adiabaten Druckluftspeicherung. (2015). (Bachelorarbeit).
6. Numerical modeling of steam chamber build-up guided by hot-water pre-injection. (2015). (Masterthesis).
7. Fundamentals of multiphase flow in porous media. (2015). (Projektarbeit).
8. Behaviors of air bubbles in drinking water pipelines: Experimental investigation. (2015). (Masterthesis).
9. Simulating Complex Flow in Karst: Numerical Upscaling through Calibration of a Double Continuum Model. (2015). (Bachelorarbeit).
10. Entwicklung und Auslegung eines thermischen Frostschutzverfahrens. (2015). (Bachelorarbeit).
11. Development of a model for microbially enhanced coalbed methane. (2015). (Masterthesis).
12. General theory of three-dimensional consolidation. (2015). (Seminararbeit).
13. Investigation of an adaptive cell-centerd finite volume scheme with application to soil-root interaction. (2015). (Masterthesis).
14. Experimentelle Untersuchung der Luftausgasung von Flüssigkeiten. (2015). (Masterthesis).
15. Pitzer-Ansatz für den reaktiven transport und Vergleich mit dem standard Debey-Hückle-Modell. (2015). (Bachelorarbeit).
16. Numerische Untersuchung des Einflusses von Heterogenitäten im porösen Medium auf mikrobiell induzierte Kalzitausfällung. (2015). (Bachelorarbeit).
17. Steam Assisted Gravity Drainage - Comparison of continuous and cyclic injection on field and laboratory scale. (2015). (Diplomarbeit).
18. Investigation of the influence of hysteresis on underground gas storage. (2015). (Bachelorarbeit).
19. Domain Decomposition Methods For Partial Differential Equations. (2015). (Seminararbeit).
20. Hierarchical Fracture Modeling Approach. (2015). (Masterthesis).
2014
1. Comparison Of Models For Fracture Tips. (2014). (Bachelorarbeit).
2. Kinetic approach for modeling salt precipitation in porous-media. (2014). (Independent-Study).
3. Analysis of Processes and Properties at a Porous-Medium Free-Flow Interface with the Application of Evaporation. (2014). (Masterthesis).
4. Spatial model coupling for the simulation of CO2 injection scenarios in deep saline aquifers. (2014). (Masterthesis).
5. Methane and Ethane sorption on shale. (2014). (Masterthesis).
6. Study on porous medium wall functions for k-epsilon and k-omega turbulence models. (2014). (Bachelorarbeit).
7. Investigation of error estimates for cell centered finite volume schemes: analysis and improvement of grid adaptation strategies in DuMuX. (2014). (Masterthesis).
8. Composite Programming als Methode zur Konfliktanalyse. Das Fallbeispiel Polder Waldsee/Altrip/Neuhofen. (2014). (Bachelorarbeit).
9. Analytical Solution for Determining Brine Leakage Along a Salt Wall. (2014). (Bachelorarbeit).
10. Implementation of advanced algebraic turbulence models on a staggered grid. (2014). (Masterthesis).
11. Three Phase (Water, Air, and NAPL) Modeling of Bail-Down Test. (2014). (Masterthesis).
12. Numerical investigation of microbially induced calcite precipitation at field scale. (2014). (Independent-Study).
13. Numerical modeling and analysis of groundwater recharge in a wadi system for efficient water management. (2014). (Masterthesis).
14. Coupling a vascular graph model and the surrounding tissue to simulate flow processes in vascular networks. (2014). (Masterthesis).
15. Verifikationsproblem mit bekannter Lösung für die Zwei-Phasen-Darcy-Gleichung. (2014). (Bachelorarbeit).
16. Bayesian networks as decision support tool for inspection and replacement of water distribution systems. (2014). (Masterthesis).
17. Kinetic approach to model salt precipitation in porous-media coupled with the free-flow. (2014). (Masterthesis).
18. Investigation of a decoupling scheme for modeling reactive transport. (2014). (Masterthesis).
19. Calibration of a complex MODFLOW-based surface water-groundwater model: A case study for the polder IMO. (2014). (Masterthesis).
20. Numerical Analysis of Modeling Concepts for Salt Precipitation and Porosity - Permeability Evolution during Brine Evaporation. (2014). (Masterthesis).
21. Bürgerbeteiligung als Lösungsweg raumbezogener Konflikte? Eine Analyse am Beispiel der Hochwasserrückhaltung Elzmündung am Oberrhein. (2014). (Bachelorarbeit).
22. A conceptional approach to the effect of shear failure on the stress field in porous media. (2014). (Masterthesis).
23. Wetting properties in porous media: Analysis of the influence on evaporation and radiative heat exchange. (2014). (Bachelorarbeit).
2013
1. Rechenzeitoptimierung bei numerischen Sicherheitsabschätzungen für Atommüll-Endlager. (2013). (Diplomarbeit).
2. Flow Modelling of Coupled Fracture-Matrix Porous Media Systems with a Two Mesh Concept. (2013). (Diplomarbeit).
3. Investigating the influence of relative permeability on DNAPL dissolution and depletion at contaminated sites. (2013). (Masterthesis).
4. Analysis of modeling concepts for radiative heat exchange during evaporation processes from porous media. (2013). (Bachelorarbeit).
5. Stochastic Investigation of the Thermal Behavior of Lithium-Ion Batteries. (2013). (Diplomarbeit).
6. Einfluss von Grenzschichten auf das Strömungsverhalten. (2013). (Seminararbeit).
7. Modeling water management in PEM fuel cells using Dumux. (2013). (Bachelorarbeit).
8. Numerical simulations of geomechanical processes - Verification of a poro-elastic model on the basis of a literature study. (2013). (Bachelorarbeit).
9. Impact of transient flow considerations on probabilistic well-head protection delineation. (2013). (Masterthesis).
10. Extending a fracture-matrix model towards Forchheimer flow in the fracture network. (2013). (Independent-Study).
11. Modeling Flow and Diffusion along a Salt Flank. (2013). (Bachelorarbeit).
12. Optimizing early-warning monitoring systems for improved drinking water resource protection. (2013). (Masterthesis).
13. Comparison of different modelling approaches for reactive transport in porous media. (2013). (Bachelorarbeit).
14. Modeling transvascular flow - Analysing the influence of adsorption, degradation and lymph flow. (2013). (Studienarbeit).
15. Coupling of porous-medium and free flow under non-equilibrium conditions. (2013). (Bachelorarbeit).
16. Analytische Berechnung der Jacobimatrix für das nicht-lineare diskrete Gleichungssystem einer Zwei-Phasen-Darcyströmung: Implementierung und Vergleich mit der näherungsweisen Berechnung. (2013). (Bachelorarbeit).
17. CO2 as a working fluid in geothermal power plants:Literature review, summary and outlook. (2013). (Studienarbeit).
18. Quantitative Risikoabschätzung und Risikomanagement in einem Grundwassereinzugsgebiet am Beispiel Burgberg. (2013). (Diplomarbeit).
19. Modellierung und Simulation arterieller Netzwerke. (2013). (Masterthesis).
20. Modeling transvascular exchanges of therapeutic agents - Sensitivity analysis. (2013). (Studienarbeit).
21. Comparison of Monolithic and Iterative Solvers for Coupled Fracture-Network Rock-Matrix Porous Media Problems. (2013). (Bachelorarbeit).
22. A comparison of different model reduction techniques for model calibration and risk assessment. (2013). (Diplomarbeit).
23. Parameter Study and a Comparison of Different Model Approaches for Simulating the Displacement of Brine and Fracking Fluid Into Overlying Aquifers. (2013). (Diplomarbeit).
24. Implementation of Element Velocities in a pressure Model for Fractured Porous Media. (2013). (Independent-Study).
2012
1. Coupling of Free Flow and Flow in Porous Media - Dimensional Analysis and Numerical Investigation. (2012). (Masterthesis).
2. Forchheimer porous-media flow models - Numerical investigation and comparison with experimental data. (2012). (Masterthesis).
3. Modellierung und experimentelle Untersuchung der Permeabilität von Pulverschüttungen. (2012). (Diplomarbeit).
4. A Response Surface Bootstrap Filter To Calibrate CO2 Injection Models. (2012). (Diplomarbeit).
5. Untersuchung strömungsmechanischer und thermischer Vorgänge innerhalb des Absorberrohrs eines salzbasierten Parabolrinnenkraftwerks. (2012). (Diplomarbeit).
6. Flow in unsaturated porous media: Numerical and experimental evaluation of the two-phase model and the Richards equation. (2012). (Masterthesis).
7. Efficient History Matching for Reduced Reservoir Models with PCE-based Bootstrap Filters. (2012). (Diplomarbeit).
8. Numerical simulation of CO2-leakage scenarios on a large scale under realistic geologic conditions. (2012). (Diplomarbeit).
9. Experimental Investigations of Water Infiltration into Unsaturated Soil - Analysis of Dynamic Capillarity Effects. (2012). (Diplomarbeit).
10. A Lagrangian Smoothed Particle Framework to Simulate DNAPL Dissolution Pheomena in Subsurface Porous Media. (2012). (Masterthesis).
11. Numerical analysis of the influence of turbulence on exchange processes between porous-medium and free flow. (2012). (Diplomarbeit).
12. Investigation of the influences of different refinement approaches in the modelling of multiphase flow in porous media. (2012). (Diplomarbeit).
13. The influence of different geological layers and in-situ stress states on the geomechanical processes during CO2 storage. (2012). (Diplomarbeit).
14. Inspecting endovascular aneurysm treatments with porous medium flow simulations and the use of a statistical framework. (2012). (Diplomarbeit).
2011
1. Coupling of Free Flow and Flow in Porous Media - A Dimensional Analysis. (2011). (Independent-Study).
2. Steam Injection Technique for In Situ Remediation of Chlorinated Hydrocarbons from Low Permeable Saturated Zones - Experiment and Numerical Approach. (2011). (Diplomarbeit).
3. Optimaler Einsatz von Rechenleistung bei alternativen Modellvereinfachungen am Beispiel eines Grundwassermodells. (2011). (Diplomarbeit).
4. Investigation on changing pressures in a saline aquifer before CO2-injection. (2011). (Studienarbeit).
5. Simulation der Konvektionsströmung bei der Speicherung von CO2 in tiefen Gesteinsformationen. (2011). (Bachelorarbeit).
6. Optimization of a Calibration Method for Heterogeneous Groundwater Models. (2011). (Diplomarbeit).
7. Dimensionless Analysis of Convection Enhanced Drug Delivery to Brain Tissues. (2011). (Masterthesis).
8. Adaptive grid refinement for two phase flow in porous media. (2011). (Diplomarbeit).
9. Horizontal Redistribution of Two Fluid Phases in a Porous Medium - Experimental and Numerical Investigations. (2011). (Diplomarbeit).
10. Theoretisch-numerische Arbeit zum Thema Verdampfung in Mikrokanälen. (2011). (Diplomarbeit).
11. Vereinfachte Methoden zur Flutwellenabschätzung. (2011). (Bachelorarbeit).
12. Implementation of a Reactive Multi-Component Transport Model for the Lime-Carbonic Acid Balance in Dumux. (2011). (Diplomarbeit).
13. Risikoanalyse für Wasserschutzgebiete am Beispiel Burgberg. (2011). (Diplomarbeit).
14. Untersuchung und Simulationen zum Strömungs- und Verweilzeitverhalten eines Zwischenbehälters in der Wasserversorgung. (2011). (Diplomarbeit).
15. Modelling biofilm induced calcite precipitation and its effect on two phase flow in porous media. (2011). (Diplomarbeit).
16. Two phase flow in homogeneous porous media - The role of dynamic capillary pressure in modeling gravity driven fingering. (2011). (Diplomarbeit).
17. Gefährdungsanalyse und Risikoabschätzung zum Schutz von Trinkwasservorkommen am Beispiel Burgberg. (2011). (Diplomarbeit).
18. Numerical reduction and numerical simulation of transport processes in blood vessels with bifurcations. (2011). (Diplomarbeit).
2010
1. Modellierung des Transports von Ölteppichen in Seen am Beispiel des Bodensees. (2010). (Diplomarbeit).
2. Cyclic Steam Injection into the Subsurface - solarthermal steam generation for enhanced oil recovery. (2010). (Diplomarbeit).
3. Stochastic multi-scale simulation of porous media flow with Polynomial Chaos Expansion. (2010). (Diplomarbeit).
4. Modeling of infiltration processes in the unsaturated zone - switching of boundary condition from Neumann to Dirichlet -. (2010). (Independent-Study).
5. Horizontal Redistribution of Two Fluid Phases in a Porous Medium - Experimental and Numerical Investigations. (2010). (Diplomarbeit).
6. Modelling biofilm distribution and its effect on two-phase flow in porous media. (2010). (Studienarbeit).
7. Parameter Estimation by Ensemble Kalman Filters with Transformed Data. (2010). (Diplomarbeit).
2009
1. Determination of Interfacial Area - Capillary Pressure - Saturation Relationships for a Single Fracture: Study, Upscaling, and Determination. (2009). (Diplomarbeit).
2. Modeling Convection-Enhanced Delivery into Brain Tissue using Information from Magnetic Resonance Imaging. (2009). (Masterthesis).
3. Modellierung des Abwassernetzes der Oase Beni Abbes, Algerien. (2009). (Diplomarbeit).
4. Numerical solution of Philip’s redistribution problem. (2009). (Diplomarbeit).
5. Modeling the transfer of therapeutic agents from the vascular space to the tissue compartment (a continuum approach). (2009). (Diplomarbeit).
6. CO2 sequestration simulations: A comparison study between DuMuX and Eclipse. (2009). (Diplomarbeit).
7. Modelling Carbon Dioxide Flow in the Shallow Subsurface. (2009). (Diplomarbeit).
8. Numerical modeling of enhanced gas recovery with CO2 storage - Primary variable switch -. (2009). (Diplomarbeit).
9. Examination of the assumption of thermal equilibrium on the fluid distribution and front stability. (2009). (Diplomarbeit).
10. Two-phase flow modeling in porous media with kinetic interphase mass transfer processes in fractures. (2009). (Diplomarbeit).
2008
1. Beschreibung und Quantifizierung der Wechselwirkungen zwischen Grundwasserkörper, Baggersee und Drainagegräben im Rahmen einer 3D Strömungs- und Transportmodellierung. (2008). (Diplomarbeit).
2. Contaminant Transport in Lake Constance: Analysis of Moments and the Dilution Index. (2008). (Diplomarbeit).
3. A double-continuum approach for two-phase flow in macroporous media: Parameter study and applications. (2008). (Diplomarbeit).
4. Modeling the Spatial and Temporal Distribution of Therapeutic Agents in Tumor Tissue (a Continuum Approach). (2008). (Diplomarbeit).
5. The use of natural heat as a tracer to quantify groundwater surface water interactions: Maules Creek, New South Wales, Australia. (2008). (Diplomarbeit).
6. Weiterentwicklung einer Finite-Volumen-Methode für die Flachwassergleichungen zur Simulation des Oberflächenabflusses im Gewässer und im Gelände. (2008). (Diplomarbeit).
7. Numerical Simulations of CO2 Injection into Saline Aquifers: Estimation of Storage Capacity and Arrival Times using Multiple Realizations of Heterogeneous Permeability Fields. (2008). (Diplomarbeit).
8. Implementation and Application of a Hysteresis Model for Multiphase Flow and Transport in Porous Media. (2008). (Diplomarbeit).
9. Experimentelle Untersuchungen der Prozesse auf technischer Skala bei der In-situ-Reinigung gering durchlässiger, gesättigter Böden mit festen Wärmequellen. (2008). (Diplomarbeit).
10. Comparison of mathematical and numerical models for twophase flow in porous media. (2008). (Diplomarbeit).
11. Towards a model concept for coupling porous gas diffusion layer and gas distributor in PEM fuel cells. (2008). (Diplomarbeit).
2007
1. Numerical Investigations of Flow through Fractured Porous Media. (2007). (Masterthesis).
2. Stochastische Modellierung und hydrogeologische Charakterisierung von Karstgrundwasserleitern. (2007). (Diplomarbeit).
3. Erarbeitung und Implementierung eines Modellkonzepts zur Simulation von Strömungs- und Transportprozessen im menschlichen Gehirn. (2007). (Diplomarbeit).
4. Investigations of Carbon Dioxide Storage Capacity in Saline Aquifers. (2007). (Diplomarbeit).
5. CO2 Storage into Dipped Saline Aquifers Including Ambient Water Flow. (2007). (Diplomarbeit).
6. Saturation Determination for Multiphase Systems in Porous Medium Using Light Transmission Method. (2007). (Independent-Study).
7. The development of a single phase multicomponent model with sorption for the analysis of methane migration from subsurface coal seams. (2007). (Masterthesis).
8. Simulation der Wasserqualität im Bodensee mit Hilfe eines dreidimensionalen Modells. (2007). (Diplomarbeit).
9. The influende on mixing in a lake of an internal boundary layer for the wind. (2007). (Independent-Study).
10. Characterisation of tracer distribution in a lake using spatial moments. (2007). (Independent-Study).
11. Characterisation of tracer distribution in Upper Lake Constance using spatial moments. (2007). (Studienarbeit).
12. Implementation of a Stochastic Wind Model into the Virtual WaterWay (VWW) Program. (2007). (Masterthesis).
13. Investigations on Flow Processes in Absorbent Products using FeFlow Finite Element Software. (2007). (Diplomarbeit).
2006
1. Numerical study on solute mixing in thermally induced buoyancy flow in groundwater. (2006). (Masterthesis).
2. Prinzipstudie zur CO2-Migration im Untergrund in Bezug auf die Mineralwässer Stuttgarts. (2006). (Diplomarbeit).
3. Investigation on macrodispersion for two-phase flow in heterogeneous porous media. (2006). (Masterthesis).
4. Efficient Spectral Methods for Geostatistical Interpolation. (2006). (Diplomarbeit).
5. Modeling of CO2 Sequestration: Carbon Dioxide Entry Behaviour at the Cap Rock. (2006). (Studienarbeit).
2005
1. Untersuchung von Randbedingungen bei der numerischen Simulation von Zweiphasenströmungen in porösen Medien. (2005). (Diplomarbeit).
2. Using the moving mesh feature to simulate the unsteady electrostatic spray painting produced by a high-speed rotary bell atomizer with the external charge. (2005). (Masterthesis).
3. Physical Aspects in the Numerical Modeling of Carbon-Dioxide Sequestration. (2005). (Masterthesis).
4. Thermal Effects of Carbon Dioxide Sequestration in the Subsurface. (2005). (Diplomarbeit).
5. Sensitivity Analysis of flow and fracture parameters in fractured porous medium. (2005). (Masterthesis).
6. Entwicklung und Implementierung eines numerischen Modellkonzepts zur Simulation von Alkoholspülungsprozessen in DNAPL-kontaminierten Grundwasserleitern. (2005). (Diplomarbeit).
7. Einfluss von Heterogenitäten auf Mehrphasenströmungen. (2005). (Diplomarbeit).
8. Identification of a REV for a given upscaling method. (2005). (Masterthesis).
9. Modelling of Multiphase Multicomponent Flow and Transport in Heap Leaching of Copper Ores. (2005). (Masterthesis).
10. Numerical Modeling of Methane Adsorption and Transport Processes in Mined Areas. (2005). (Masterthesis).
11. Experimental and numerical investigations on steam injection in saturated soils. (2005). (Masterthesis).
2004
1. Evaluation of CO2 velocity changes in a CO2 plume migrating in the subsurface. (2004). (Independent-Study).
2. Effects of groundwater density on CO2 migration in the subsurface. (2004). (Independent-Study).
3. Interpretation of simulation results including a dynamic capillary pressure relationship. (2004). (Masterthesis).
4. Steam- and steam-air-injection in the saturated zone: experimental and numerical investigations on DNAPL-mobilization and heat front behaviour. (2004). (Masterthesis).
5. Modeling of CO2 Injection in Geological Formations: The Effect of Dissolved CO2 on Water Density. (2004). (Independent-Study).
6. Inverse modeling of groundwater transport using temporal moments of concentration. (2004). (Masterthesis).
7. Influence of Seasonal Stratification Patterns on the Basin-Scale Motions of Upper Lake Constance. (2004). (Masterthesis).
8. The Influence of the Intrinsic Permeability and the van Genuchten Parameters on Small-Scale Simulation Results. (2004). (Masterthesis).
9. Modeling of Natural Attenuation: Evaluation of Available Codes. (2004). (Independent-Study).
10. Development of a Finite Element model for a cylindrical device for the determination of the hydraulic conductivity tensor. (2004). (Masterthesis).
11. Parametrisierung von Buhnen in 2D-HN-Modellen anhand numerischer Modellrechnungen und Naturdaten der Donau. (2004). (Diplomarbeit).
12. Parameter study for the migration of DNAPL around a sand lens. (2004). (Independent-Study).
13. Simultaneous geostatistical identification of conductivity and recharge parameters in the groundwater flow equation. (2004). (Masterthesis).
14. Modeling of Mine Gas Repositories. (2004). (Masterthesis).
2003
1. Numerische und experimentelle Untersuchung des Einflusses der Sensorheizung auf den Wärmeübergang an Abgassensoren. (2003). (Diplomarbeit).
2. Nachbildung und Normalisierung von Tracersummenkurven. (2003). (Diplomarbeit).
3. Estimation en temps reel de la biodegradation d’un polluant dans un sol non-sature-stude en colonne. (2003). (Bachelorarbeit).
4. Artificial Groundwater Recharge. (2003). (Independent-Study).
5. Experimental determination of transverse dispersion coefficients in porous media. (2003). (Masterthesis).
6. Development of a program for the groundwater flow equation in an unconfined aquifer. (2003). (Independent-Study).

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2025

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