This image shows Holger Class

Holger Class

apl. Prof. Dr.-Ing.

Akademischer Oberrat
Institute for Modelling Hydraulic and Environmental Systems
Department of Hydromechanics and Modelling of Hydrosystems

Contact

+49 711 685 64678
+4971168560430

Business card (VCF)

Pfaffenwaldring 61
70569 Stuttgart
Germany
Room: 1.012

Office Hours

By appointment only

Fluid Mechanics 1 I Modul
Fluid Mechanics 2 I Modul
Environmental Fluid Mechanics 1 I Modul
Multiphase Modeling in Porous Media I Modul

Abitur

June 1991 in Münsingen

Academic Degrees

1997: Diploma (Dipl.-Ing), University of Stuttgart
2000: Doctoral Degree (Dr.-Ing.), Technical University of Braunschweig
2008: Habilitation (Dr.-Ing. habil.), University of Stuttgart

Academic Career

1998 - 2000: Doctoral Researcher, Institute of Computer Applications in Civil Engineering, Technical University of Braunschweig
2000 - 2004: Postdoctoral Researcher, Institute for Modelling Hydraulic and Environmental Systems, University of Stuttgart
since 2004: Deputy, Institute for Modelling Hydraulic and Environmental Systems, University of Stuttgart
since 2011: Appointment as "außerplanmäßiger Professor", Institute for Modelling Hydraulic and Environmental Systems, 
University of Stuttgart

 

  • 1999: 1st prize of the John F. Kennedy Student Paper competition at the 28th congress of the International Association for Hydraulic Research
  • 2006: University of Stuttgart Environmental Engineering student award for 
    best lecture "Hydromechanics"

Publikations

  1. (Journal-) Articles

    1. 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/103390/geosciences13020051
    2. 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(3), e2021WR030494. https://doi.org/10.1029/2021WR030494
    3. 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(2), 527--549. https://doi.org/10.1007/s11242-022-01782-8
    4. 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(2), Article 2. https://doi.org/10.1007/s11242-021-01560-y
    5. 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(1), 1–23. https://doi.org/10.1007/s11242-021-01586-2
    6. 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
    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(11), Article 11. https://doi.org/10.3390/w12113008
    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
    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(13), 4538. https://doi.org/10.3390/app10134538
    10. 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(4), 1707--1723. https://doi.org/10.1007/s10596-020-09987-w
    11. 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(3), 738. https://doi.org/10.3390/w12030738
    12. 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
    13. 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(1), 5. https://doi.org/10.1007/s13137-019-0116-8
    14. 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
    15. 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., … Weinhardt, F. (2018). DuMuX 3.0.0. https://doi.org/10.5281/zenodo.2479595
    16. 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
    17. 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.
    18. 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).
    19. 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
    20. 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
    21. 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
    22. 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).
    23. 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(2), Article 2. https://doi.org/10.1007/s11242-015-0617-3
    24. Kleinknecht, S., Class, H., & Braun, J. (2015). Density-Driven Migration of Heavy NAPL Vapor in the Unsaturated Zone. Vadose Zone Journal, 14.
    25. 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.
    26. 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.
    27. 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(5), Article 5. https://doi.org/10.1002/2014WR016503
    28. 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.
    29. 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
    30. 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.
    31. 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
    32. 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
    33. 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.
    34. 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
    35. 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
    36. 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.
    37. 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
    38. 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(1), Article 1. https://doi.org/10.1016/j.jconhyd.2010.08.001
    39. 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
    40. 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(1), Article 1. https://doi.org/10.2516/ogst/2010037
    41. 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.
    42. 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(3), Article 3. https://doi.org/10.1007/s10596-011-9224-8
    43. 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(8), Article 8. https://doi.org/10.1016/j.advwatres.2010.05.001
    44. 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
    45. 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
    46. 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
    47. 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
    48. 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(3), Article 3. https://doi.org/10.1016/j.ijggc.2008.10.001
    49. 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(3), Article 3. https://doi.org/10.1016/j.ijggc.2008.10.002
    50. Kopp, A., Probst, P., Class, H., Hurter, S., & Helmig, R. (2009). Estimation of CO2 storage capacity coefficients in geologic formations. Energy Procedia, 1(1), Article 1. https://doi.org/10.1016/j.egypro.2009.02.060
    51. 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., … Wei, L. (2009). A benchmark study on problems related to CO2 storage in geologic formations: Summary and discussion of the results. Computational Geosciences, 13(4), Article 4. https://doi.org/10.1007/s10596-009-9146-x
    52. 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, 59, Article 59.
    53. 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). 2, Article 2. https://doi.org/10.1016/j.ijggc.2008.02.008
    54. Class, H., Helmig, R., & Neuweiler, I. (2008). Sequential coupling of models for contaminant spreading in the vadose zone. Vadose Zone Journal, 7(2), Article 2. https://doi.org/10.2136/vzj2007.0056
    55. 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). 2, Article 2. https://doi.org/10.1016/j.jpowsour.2005.12.068
    56. 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(1), Article 1. https://doi.org/10.1023/B:COMG.0000024445.39048.21
    57. 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(5), Article 5. https://doi.org/10.1016/S0309-1708(02)00015-5
    58. 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(5), Article 5. https://doi.org/10.1016/S0309-1708(02)00014-3
    59. Helmig, R., Bastian, P., Class, H., Ewing, J., Hinkelmann, R., Huber, R. U., Jakobs, H., & Sheta, H. (1998). Architecture of the Modular Program System MUFTE-UG for Simulating Multiphase Flow and Transport Processes in Heterogeneous Porous Media. 2. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/Geoscien.zip
    60. 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(6), Article 6.
    61. Class, H., Mahl, L., Ahmed, W., Norden, B., Kühn, M., & Kempka, T. (1963). Matching pressure measurements and observed CO2 arrival times with static and dynamic modelling at the Ketzinstorage site.
  2. Monograhs

    1. Scheer, D., Class, H., & Flemisch, B. (2021). Subsurface Environmental Modelling Between Science and Policy. Springer International Publishing. https://doi.org/10.1007/978-3-030-51178-4
    2. Helmig, R., & Class, H. (2005). Grundlagen der Hydromechanik. Shaker Verlag.
  3. Datasets

    1. Weinhardt, F., Deng, J., Steeb, H., & Class, H. (2022). Optical Microscopy and log data of Enzymatically Induced Calcite Precipitation (EICP) in microfluidic cells (Quasi-2D-structure). DaRUS. https://doi.org/10.18419/darus-1799
    2. Weinhardt, F., Class, H., Vahid Dastjerdi, S., Karadimitriou, N., Lee, D., & Steeb, H. (2021). Optical Microscopy and pressure measurements of Enzymatically Induced Calcite Precipitation (EICP) in a microfluidic cell. DaRUS. https://doi.org/10.18419/darus-818
    3. Vahid Dastjerdi, S., Steeb, H., Ruf, M., Lee, D., Weinhardt, F., Karadimitriou, N., & Class, H. (2021). micro-XRCT dataset of Enzymatically Induced Calcite Precipitation (EICP) in a microfluidic cell. DaRUS. https://doi.org/10.18419/darus-866
  4. Contributions to anthologies

    1. Class, H., Kissinger, A., Knopf, S., Konrad, W., Noack, V., & Scheer, D. (2015). Combined Natural and Social Science Approach for Regional-Scale Characterisation of CO2 Storage Formations and Brine Migration Risks (CO2BRIM) (No. 22; Issue 22). Springer-Verlag.
    2. Helmig, R., Hinkelmann, R., Class, H., Breiting, T., Kobayashi, K., Bielinski, A., & Sheta, H. (2003). Modellierung des Ausbreitungsverhaltens umwelt- und klimagefährdender Gase im Untergrund. In Simulation und Visualisierung an der Universität Stuttgart, Universität Stuttgart. Referat für Presse- und Öffentlichkeitsarbeit. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/simulation_uni.pdf
    3. Hinkelmann, R., Sheta, H., Class, H., Sauter, E. J., Helmig, R., & Schlüter, M. (2002). Numerical Simulation of freshwater, salt water and methane interaction processes in a coastal aquifer. In J. Chadam, A. Cunningham, R. E. Ewing, & P. & M. W. Ortoleva (Eds.), IMA Volumes in Mathematics and its Applications, Volume 131: Resource Recovery, Confinement and Remediation of Environmental Hazards. Springer-Verlag.
    4. Helmig, R., Class, H., & Hinkelmann, R. (2001). Isothermal and Nonisothermal Multiphase Multicomponent Processes in the Subsurface. In S. Diebels (Ed.), Zur Beschreibung komplexen Materialverhaltens: Beiträge zur Festschrift anläßlich des 50. Geburtstag von Herrn Prof. Dr.-Ing. W. Ehlers (II–7; Issues II–7). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/main.ps.gz
  5. Conference papers

    1. Hommel, J., Phillips, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2017, November). Modeling porous medium modification through induced calcite precipitation. 7th GACM Colloquium on Computational Mechanics , 11.10.2017 - 13.10.2017, Stuttgart. https://dx.doi.org/10.18419/opus-9334
    2. Oladyshkin, S., Class, H., Helmig, R., & Nowak, W. (2010, December). Data-driven robust design and probabilistic risk assessment: application to underground carbon dioxide storage, Abstract H41L-03. AGU Fall Meeting 2010, 13.12.2010 - 17.12.2010, San Francisco, USA.
    3. Oladyshkin, S., Class, H., Helmig, R., & Nowak, W. (2010). Probabilistic risk assessment for CO2 storage in geological formations: robust design and support for decision making under uncertainty. Geophysical Research Abstracts, Vol.12(EGU2010-3559), Article EGU2010-3559.
    4. Oladyshkin, S., Class, H., Hofmann, R., & Nowak, W. (2010). Highly efficient tool for probabilistic risk assessment of CCS joint with injection design. In J. Carrera (Ed.), Computational Methods in Water Resources (CMWR), XVIII International Conference on Water Resources, 21.06.2010 - 24.06.2010, Barcelona, Spain. C.F. Müller Verlag.
    5. Helmig, R., Class, H., Darcis, M., Niessner, J., Erbertseder, K., Perfahl, H., & Reuss, M. (2008, November). Transfer of modeling concepts for flow and transport processes in porous media systems to biological tissues. DFG Expertengespräch Medizintechnik, 06.11.2008 - 07.11.2008, Potsdam.
    6. Helmig, R., Darcis, M., & Class, H. (2008). Transfer of modeling concepts for flow and transport processes in porous media from subsurface systems to biological tissues. ASME International Mechanical Engineering Congress and Exposition, 31.10.2008 - 06.11.2008, Boston, 12(WOS:000265081000004), Article WOS:000265081000004.
    7. Class, H., Ebigbo, A., & Kopp, A. (2007). Numerical modeling of CO2 storage in geological formations - recent developments and challenges. 1. French-German Symposium on Geological Storage of CO2, 21.06.2007 - 22.06.2007, Potsdam, ScienceReportNo.9, Article ScienceReportNo.9. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/class-d-f-07.pdf
    8. Ochs, S. O., Class, H., & Helmig, R. (2006). Fortschritte bei der Entwicklung eines prognosefähigen numerischen Modells zur Simulation der Dampfinjektion in die gesättigte Bodenzone. In J. Braun & H.-P. & M. S. Koschitzky (Eds.), VEGAS - Statuskolloquium 2006, 28.09.2006 - 28.09.2006, Stuttgart (09_2006; Issue 09_2006).
    9. Helmig, R., Miller, C. T., Jakobs, H., Class, H., Hilpert, M., Kees, C. E., & Niessner, J. (2006, June). Multiphase Flow and Transport Modeling in Heterogeneous Porous Media. Progress in Industrial Mathematics at ECMI 2004, 21.06.2004 - 25.06.2004, Eindhoven University of Technology.
    10. Greiner, P., Braun, J., Class, H., Koschitzky, H.-P., Schnieders, J., & Stadler, L. (2005). Numerische Modellierung der Mehrphasen-/Mehrkomponenten-Hydraulik bei der Alkoholspülung. In J. Braun & H. P. & M. M. Koschitzky (Eds.), Ressource Untergrund, 10 Jahre VEGAS: Forschung und Technologieentwicklung zum Schutz von Grundwasser und Boden, 28.09.2005 - 29.09.2005, Universität Stuttgart (No. 145; Issue 145).
    11. Ochs, S. O., Class, H., & Färber, A. (2005). Numerische und experimentelle Untersuchung zur Dampfinjektion in die gesättigte Bodenzone. In J. Braun & H. P. & M. M. Koschitzky (Eds.), Ressource Untergrund, 10 Jahre VEGAS: Forschung und Technologieentwicklung zum Schutz von Grundwasser und Boden, 28.09.2005 - 29.09.2005, Universität Stuttgart (No. 145; Issue 145).
    12. Class, H., & Ochs, S. O. (2005). Ein Konzept zur Kopplung numerischer Module für die Simulation von Schadstoffversickerung, -susbreitung und thermischer Sanierung. In J. Braun & H. P. & M. M. Koschitzky (Eds.), Ressource Untergrund, 10 Jahre VEGAS: Forschung und Technologieentwicklung zum Schutz von Grundwasser und Boden, 28.09.2005 - 29.09.2005, Universität Stuttgart (No. 145; Issue 145).
    13. Färber, A., Class, H., Jie, D., Koschitzky, H.-P., Müller, C., Ochs, S. O., Trötschler, O., & Steidinger, S. (2004). Dampf-Luft-Injektion zur In-situ-Sanierung der gesättigten Bodenzone: Anwendungsmöglichkeiten und Erfahrungen aus einer PCE-Sanierung in Albstadt. In B. Barczewski, H.-P. Koschitzky, & K. & R. W. Weber (Eds.), VEGAS - Statuskolloquium 2004, 05.10.2004, Universität Stuttgart (No. 131; Issue 131).
    14. Hölzemann, S., Class, H., & Helmig, R. (2004). A New Concept for the Numerical Simulation and Parameter Identification of Multiphase Flow and Transport Processes in Cohesive Soils. In T. Schanz (Ed.), Unsaturated Soils: Numerical and Theoretical Approaches - Proceedings of the International Conference “From Experimental Evidence towards Numerical Modelling of Unsaturated Soils”, 18.09.2003 - 19.09.2003, Bauhaus-Universität Weimar. Springer-Verlag.
    15. Hölzemann, S., Class, H., & Helmig, R. (2004, June). Numerical Modeling of Multiphase Flow and Transport Processes in Cohesive Soils and Parameter Identification Strategies. 15. International Conference on Computational Methods in Water Resources, 13.06.2004 - 17.06.2004, Chapel Hill, North Carolina, USA.
    16. Helmig, R., Jakobs, H., & Class, H. (2002, June). Multiphase flow and transport modeling in heterogeneous porous media. 14. International Conference on Computational Methods in Water Resources, 23.06.2002 - 28.06.2002, Delft, The Netherlands.
    17. Class, H., Bielinski, A., & Helmig, R. (2002, October). CO2-Injektion in geologische Formationen - numerische Berechnungen und erste Überlegungen für großskalige Experimente in VEGAS. VEGAS Statuskolloquium, 12.10.2001, Universität Stuttgart.
    18. Class, H., & Helmig, R. (1999, October). Numerische Modellierung von thermisch unterstützter Bodenluftabsaugung. VEGAS Statuskolloquium, 12.10.2001, Universität Stuttgart.
  6. Theses

    1. Class, H. (1997). Numerische Untersuchungen zum Gas-Wasser-Verhalten in einem Stollen mit Verschlußbauwerk [Diplomarbeit]. Universität Stuttgart, Institut für Wasserbau.
  7. PhDs

    1. 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
    2. 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
  8. Research Reports

    1. Zigelli, N., Kissinger, A., & Class, H. (2014). Modeling the migration of fracturing fluids into shallow groundwater systems - literature review and numerical simulations (Bericht TB09/2014; Vol. LH222, Issue TB09/2014). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2014/Zigelli_etal_2014.pdf
    2. Darcis, M., Flemisch, B., & Class, H. (2012). CO2-MoPa -- Kopplung von DuMux und OGS zur Verifikation der OGS-Eclipse Kopplung -- Untersuchung von zeitlichen und räumlichen Modellkopplungsstrategien zur Effizienzsteigerung (Bericht 10/12; Vol. LH221, Issue 10/12).
    3. Ebigbo, A., Phillips, A., Gerlach, R., Helmig, R., Cunningham, A. B., Class, H., & Spangler, L. H. (2012). Darcy-scale modeling of microbially induced carbonate mineral precipitation in sand columns. In Water Resources Research (Bericht No. W07519; Water Resources Research, Vol. 48, Issue W07519). https://doi.org/10.1029/2011WR011714
    4. Class, H., Brauer, K., Kissinger, A., Walter, L., Darcis, M., & Ebigbo, A. (2011). Beeinträchtigung von Grundwasser durch Speicherung von Gasen im Untergrund (Bericht 15/2011; Vol. LH220, Issue 15/2011). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2012/WB15-2011-LH2-20.pdf
    5. Kopp, A., Class, H., & Helmig, R. (2007). Treibhausgase in der Bodenfalle: Vol. 01_07 (Bericht No. 99; Issue 99). UNI-Kurier. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Stuttgarter-UniKurier-Nr99-pg54-Juni2007-Treibhausgase_in_der_Bodenfalle.pdf
    6. Dogan, M. O., Class, H., & Helmig, R. (2007). Numerische Modellierung von Mehrphasenströmungs- und Transportprozessen bei der Sequestrierung von CO2 in geologischen Formationen (Bericht 09_2007; Vol. LH215, Issue 09_2007). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/co2trap_wissenschaftlicher_bericht.pdf
    7. Assteerawatt, A., Bastian, P., Bielinski, A., Breiting, T., Class, H., Ebigbo, A., Eichel, H., Freiboth, S., Helmig, R., Kopp, A., Niessner, J., Ochs, S. O., Papafotiou, A., Paul, M., Sheta, H., & Ölmann, U. (2005). MUFTE-UG: Structure, Applications andNumerical Methods [Bericht]. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/IGWMC_newsletter_MUFTE.pdf
    8. Hazra, S. B., Class, H., Helmig, R., & Schulz, V. (2002). Forward and Inverse Problems in Modeling of Multiphase Flow and Transport Through Porous Media (Bericht 02_2002; Issue 02_2002).
    9. Sheta, H., Class, H., & Helmig, R. (1998). Numerische Simulation von isothermen/ nichtisothermen Mehrphasenströmungen unter Berücksichtigung der Veränderung der Fluideigenschaften. In PWAB-Statuskolloquium, 17.03.1998 - 18.03.1998, Karlsruhe (PWAB-Statuskolloquium, 17.03.1998 - 18.03.1998, Karlsruhe) [Bericht].

Talks

  1. 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
  2. Hommel, J., Phillips, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2018). Modeling field-scale applications of microbially induced calcium carbonate precipitation. In Computational Methods in Water Resources (CMWR) XXII, 04.06.2018 - 07.06.2018, St. Malo, Frankreich. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2018/CMWR2018Poster.pdf
  3. Class, H., Walter, L., Darcis, M., Ebigbo, A., & Flemisch, B. (2011). Simulation-based concepts for the evaluation of risk scenarios associated with geological storage of carbon dioxide. In Kolloquium Wasserwesen, TU Berlin, 05.05.2011, Berlin. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/vortraege/2011/simulation_based
  4. Class, H., Darcis, M., Walter, L., & Kempka, T. (2010). Coupling models of different complexity on different spatial and temporal scales for simulating CO2 storage scenarios. In Rencontres Scientifiques, High Performance Computing for CO2 Geological Storage, 14.06.2010 - 16.06.2010, Paris, France.
  5. Class, H. (2010). Predictive modelling? �On matching arrival times and pressure data in Ketzin. In Norwegian-German workshop on Geological Storage of CO2, 01.06.2010 - 02.06.2010, Potsdam. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/vortraege//N-D-CCS-Workshop-Potsdam-June2010-Class.pdf
  6. Class, H., Darcis, M., & Walter, L. (2009). Coupled models for approaching the large scales in simulating CO2 storage in geological formations. In International Workshop on Coupled Models in Energy, Hydrological and Climate Research, 08.10.2009 - 09.10.2009, Berlin.
  7. Class, H., Ebigbo, A., Darcis, M., Walter, L., Flemisch, B., Kopp, A., & Helmig, R. (2009). Intercomparison of codes and models - How can we improve reliability and understanding of model predictions for CO2 storage? In Workshop on Modelling and Risk Assessment of Geological Storage of CO2, 03.08.2009 - 07.08.2009, Longyearbyen, Svalbard.
  8. Class, H. (2009). Strömungen durch poröse Medien und in komplexen Strukturen - Beispiele und Konzepte zur Kopplung von Modellierungsansätzen.
  9. Class, H., Ebigbo, A., Kopp, A., & Helmig, R. (2008). Numerical Investigation of CO2 Sequestration in Geological Formations - Problem-Oriented Benchmarks. In Geotechnologien Statusseminar, 20.10.2008 - 21.10.2008, Stuttgart, Haus der Wirtschaft.
  10. 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
  11. Class, H. (2008). Numerical Models for Carbon Dioxide Storage in Geological Formations. In Workshop on Numerical Models for Carbon Dioxide Storage in Geological Formations, 02.04.2008 - 04.04.2008, Stuttgart.
  12. Class, H., Ebigbo, A., Helmig, R., & Darcis, M. (2007). Numerical Investigation of CO2 Sequestration in Geological Formations - Problem-Oriented Benchmarks. In Geotechnologien Statusseminar, 15.11.2007 - 16.11.2007, Hamburg. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/vortraege/BENCHMARKS_HAMBURG_07.pdf
  13. Class, H., Kopp, A., & Ebigbo, A. (2007). Modeling of CO2 storage in geological formations. In IAHR Stuttgart Student Chapter Colloquium 2007, 31.10.2007 - 31.10.2007, Stuttgart.
  14. Class, H., Ebigbo, A., Kopp, A., & Helmig, R. (2007). Numerical modeling of CO2 storage in geological formations - recent developments and challenges. In 1. French-German Symposium on Geological Storage of CO2, 21.06.2007 - 22.06.2007, Potsdam.
  15. Class, H., Ebigbo, A., Kopp, A., & Helmig, R. (2007). Reliability of numerical models for simulating CO2 storage in deep geological formations. In Deutsche Geophysikalische Gesellschaft - Jahrestagung, 26.03.2007 - 29.03.2007, Aachen. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/vortraege/dgg-aachen-07_mod.pdf
  16. Class, H. (2007). Models for Non-Isothermal Compositional Gas-Liquid Flow and Transport in Porous Media. In Selected Topics and International Network Lectures - Seminar Lehrstuhl für Hydromechanik und Hydrosystemmodellierung, 12.02.2007 - 13.02.2007, Stuttgart.
  17. Class, H., & Ebigbo, A. (2006). Numerical investigation of CO2 sequestration in geological formations - problem-oriented benchmarks. In Geotechnologien Statusseminar, 22.11.2005 - 23.11.2005, Hannover.
  18. Kühn, M., Kempka, T., & Class, H. (2006). Development and Evaluation of Innovative Strategies for Sequestration and Permanent Immobilisation of CO2 in Geological Formations. In Geotechnologien Statusseminar, 21.11.2006 - 22.11.2006, Freiberg.
  19. Class, H., & Ochs, S. O. (2005). Ein Konzept zur Kopplung numerischer Module für die Simulation von Schadstoffversickerung, -susbreitung und thermischer Sanierung. In J. Braun & H. P. & M. M. Koschitzky (Eds.), Ressource Untergrund, 10 Jahre VEGAS: Forschung und Technologieentwicklung zum Schutz von Grundwasser und Boden, 28.09.2005 - 29.09.2005, Universität Stuttgart (No. 145; Issue 145).
  20. Class, H., Bielinski, A., & Ochs, S. O. (2004). Applications of non-isothermal multiphase multicomponent models for flow and transport in porous media. In Progress in Industrial Mathematics at ECMI 2004, 21.06.2004 - 25.06.2004, Eindhoven University of Technology.
  21. Class, H., & Bielinski, A. (2003). Numerical modeling of nonisothermal multiphase multicomponent processes: General concepts, basic assumptions and some applications. In Workshop on Aquifer Storage of CO2, 06.11.2003 - 07.11.2003, University of Bergen, Norway.
  22. Class, H., & Acosta, M. (2003). Numerical modelling of non-isothermal multiphase multicomponent processes in porous media: 1. General concepts, basic assumptions, and example applications 2. The model concept applied to describe the processes in the cathode diffusion layer of a PEM-fuel cell. In MACSI-Net Working Group 14: “Filtration Problems in porous media and paper manufacturing” (Workshop 2003), 21.11.2003 - 22.11.2003, Universität Stuttgart.
  23. Class, H., Bielinski, A., & Helmig, R. (2002, October). CO2-Injektion in geologische Formationen - numerische Berechnungen und erste Überlegungen für großskalige Experimente in VEGAS. VEGAS Statuskolloquium, 12.10.2001, Universität Stuttgart.
  24. Class, H., Bielinski, A., & Helmig, R. (2001, October). Numerische Simulation von Mehrphasen-Mehrkomponenten-Systemen: Effiziente Algorithmen, Möglichkeiten und Probleme. VEGAS Statuskolloquium, 12.10.2001, Universität Stuttgart.
  25. Class, H., & Helmig, R. (1999, October). Numerische Modellierung von thermisch unterstützter Bodenluftabsaugung. VEGAS Statuskolloquium, 12.10.2001, Universität Stuttgart.
  26. Class, H. (1999, August). Numerical Simulation of Non-isothermal Steam Injection Processes in NAPL-Contaminated Porous Media. 28. IAHR Congress: Hydraulic Engineering for Sustainable Water Resources Management at the Turn of the Millennium, 22.08.1999 - 27.08.1999, Graz, Austria.
  27. Sheta, H., Class, H., & Helmig, R. (1998). Numerische Simulation von isothermen/ nichtisothermen Mehrphasenströmungen unter Berücksichtigung der Veränderung der Fluideigenschaften. In PWAB-Statuskolloquium, 17.03.1998 - 18.03.1998, Karlsruhe (PWAB-Statuskolloquium, 17.03.1998 - 18.03.1998, Karlsruhe) [Bericht].

Posters

  1. Seitz, G., Helmig, R., & Class, H. (2019). Model Coupling in thermochemical Heat Storage. In InterPore 2019. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2019/2019_SeitzG_Interpore_Poster.pdf
  2. Scherrer, S., Haslauer, C., Class, H., Klaas, N., & Braun, J. (2019). Änalytische Berechnung periodisch betriebener Wärmequellen im Untergrund" (Poster). Der Geothermiekongress 2019, München.
  3. Hommel, J., Phillips, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2018). Modeling field-scale applications of microbially induced calcium carbonate precipitation. In Computational Methods in Water Resources (CMWR) XXII, 04.06.2018 - 07.06.2018, St. Malo, Frankreich. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2018/CMWR2018Poster.pdf
  4. Beck, M., & Class, H. (2018). Comparison of sequential and fully-coupled approaches for flow and geomechanics. In European Geosciences Union (EGU) - General Assembly, 08.04.2018 - 13.04.2018, Vienna, Austria.
  5. Hommel, J., Phillips, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2018). Modeling field-scale applications of microbially induced calcium carbonate precipitation. In 2nd International Conference on Simulation Technology (SimTech 2018), 26.03.2018 - 28.03.2018, Stuttgart. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2018/SimTech2018Poster.pdf
  6. Glaeser, D., Helmig, R., Flemisch, B., & Class, H. (2017). A discrete fracture model using a cell-centered finite volume scheme with multi-point flux approximation. In 9th International Conference on Porous Media & Annual Meeting (InterPore), 08.05.2017 - 11.05.2017, Rotterdam, Netherlands. https://www.new.interpore.org/interpore-rotterdam-2017
  7. Seitz, G., Helmig, R., & Class, H. (2017). Numerical Model of a Ca(OH)2 / CaO thermochemical heat storage reactor. In 9th International Conference on Porous Media & Annual Meeting - InterPore 2017, 08.05.2017 - 11.05.2017, Rotterdam, The Netherlands. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2017/Seitz_IWS_Interpore2017.pdf
  8. Hommel, J., Ebigbo, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2016). Finding a balance between accuracy and computational effort for modeling biomineralization. In 1st SRP NUPUS Meeting, 05.10.2016 - 07.10.2016, Mühlhausen im Täle. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2016/Hommel_NUPUS_Poster_2016.pdf
  9. Hommel, J., Ebigbo, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2016). Finding a balance between accuracy and effort for modeling biomineralization. In Gordon Research Conference on Flow and Transport in Permeable Media, 01.08.2016 - 05.08.2016, Girona, Spanien. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2016/Gordon_Hommel_2016.pdf
  10. Hommel, J., Ebigbo, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2016). Finding a balance between accuracy and effort for modeling biomineralization. In Gordon Research Seminar on Flow and Transport in Permeable Media, 30.07.2016 - 31.07.2016, Girona, Spanien. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2016/Gordon_Hommel_2016.pdf
  11. Glaeser, D., Class, H., Kissinger, A., & Beck, M. (2016). Towards a parameterized model for risk assessment in shale gas exploration. In European Geosciences Union General Assembly (2016), 17.04.2016 - 22.04.2016, Vienna, Austria. https://www.egu2016.eu/
  12. Hommel, J., Ebigbo, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2016). Finding a balance between accuracy and computational effort for modeling biomineralization. In EGU General Assembly 2016, 18.04.2016 - 22.04.2016, Vienna, Austria. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2016/EGU_Hommel_2016.pdf
  13. Hommel, J., Ebigbo, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2015). Finding a balance between accuracy and effort for modeling biomineralization. In NUPUS annual meeting 2015 , 08.09.2015 - 12.09.2015, Freudenstadt. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/NUPUS_Hommel_2015.pdf
  14. Beck, M., Seitz, G., Class, H., & Helmig, R. (2015). A new phenomenological approach to modelling of shear failure in porous media. In NUPUS annual meeting 2015 , 08.09.2015 - 12.09.2015, Freudenstadt. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/NupusPoster_Beck_2015.pdf
  15. 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 insights. In 7th International Conference on Porous Media & Annual Meeting - InterPore 2015, 18.05.2015 - 21.05.2015, Padua, Italy. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/InterPore_Hommel_2015.pdf
  16. Hommel, J., Lauchnor, E., Cunningham, A. B., Helmig, R., Ebigbo, A., & Class, H. (2014). Improvements in Modeling Microbially Induced Calcite Precipitation as a Leakage Mitigation Technology. In Gordon Research Seminar on Flow and Transport in Permeable Media 2014, 05.07.2014 - 06.07.2014, Lewiston, Maine, USA. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/Gordon_Hommel_2014.pdf
  17. Beck, M., Darcis, M., Class, H., & Helmig, R. (2014). Spatial model coupling - an efficient scheme to combine hydraulic and geomechanic simulations. In Gordon Research Conference on Flow and Transport in Permeable Media 2014, 06.07.2014 - 11.07.2014, Lewiston, Maine, USA. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2014/GordonPosterBeck.pdf
  18. Hommel, J., Lauchnor, E., Cunningham, A. B., Helmig, R., Ebigbo, A., & Class, H. (2014). Improvements in Modeling Microbially Induced Calcite Precipitation as a Leakage Mitigation Technology. In Gordon Research Conference on Flow and Transport in Permeable Media 2014, 06.07.2014 - 11.07.2014, Lewiston, Maine, USA. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2014/Gordon_Hommel_2014.pdf
  19. Hommel, J., Lauchnor, E., Cunningham, A. B., Helmig, R., Ebigbo, A., & Class, H. (2014). Estimation of uncertain parameters to improve modeling of Microbially Induced Calcite Precipitation. In European Geoscience Union General Assembly 2014, 28.04.2014 - 02.05.2014, Vienna, Austria. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2014/EGU_Hommel_2014.pdf
  20. Hommel, J., Cunningham, A. B., Helmig, R., Ebigbo, A., & Class, H. (2014). Estimation of uncertain parameters of the biomineralization model by inverse modeling. In NUPUS annual meeting 2014, 16.03.2014 - 19.03.2014, Freudenstadt. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2014/Nupus-Meeting_Hommel_2014.pdf
  21. Class, H., Flemisch, B., Helmig, R., Baber, K., Faigle, B., Grüninger, C., Kissinger, A., Schmid, K. S., Schneider, M., Schröder, N., Schwenck, N., & Walter, L. (2014). Dumux: Dune for Multi-Phase, Component, Scale, Physics, ... Flow and Transport in Porous Media. In NumPor Annual Meeting 2014, 02.03.2014 - 03.03.2014, KAUST, Kingdom of Saudi Arabia.
  22. Kleinknecht, S., Braun, J., & Class, H. (2014). Migration and Retention of a Heavy NAPL Vapor in the Unsaturated Zone. In 8th NUPUS Meeting. http://www.iws.uni-stuttgart.de/publikationen/vegas/NUPUSConferenceKleinknecht.pdf
  23. Hommel, J., Cunningham, A. B., Ebigbo, A., Helmig, R., & Class, H. (2013). Numerical investigation of microbially induced calcite precipitation as leakage mitigation technology. In NUPUS-Conference, 30.09.2013 - 02.10.2013, Bergen, Norway. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2013/NUPUS-Conference_Hommel_2013.pdf
  24. Oladyshkin, S., Schröder, P., Class, H., & Nowak, W. (2013). Chaos Expansion Based Bootstrap Filter To Calibrate CO2 Injection. In EGU General Assembly, 07.04.2013 - 11.04.2013, Vienna, Austria: Vol. Vol.15.
  25. Hommel, J., Cunningham, A. B., Helmig, R., Ebigbo, A., & Class, H. (2013). Numerical investigation of microbially induced calcite precipitation as leakage mitigation technology. In NUPUS annual Meeting 17-20 March 2013, 17.03.2013 - 20.03.2013, Freudenstadt. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2013/Nupus-Meeting_Hommel_2013.pdf
  26. Oladyshkin, S., Class, H., Helmig, R., & Nowak, W. (2011). Efficient Bayesian updating with particle filters based on polynomial chaos expansion for CO2 storage. In AGU Fall Meeting 2011, 05.12.2011 - 09.12.2011, San Francisco, USA.
  27. Oladyshkin, S., Class, H., Helmig, R., & Nowak, W. (2011). Modeling of underground carbon dioxide storage: data-driven robust design and probabilistic risk assessment. In SimTech 2011 - International Conference on Simulation Technology 2011, 14.06.2011 - 17.06.2011, Stuttgart.
  28. Walter, L., Class, H., Oladyshkin, S., Flemisch, B., & Helmig, R. (2011). Influence of Dirichlet boundary conditions on risk assessment for CO2 storage in geological formations. In SimTech 2011 - International Conference on Simulation Technology 2011, 14.06.2011 - 17.06.2011, Stuttgart.
  29. Walter, L., Oladyshkin, S., Class, H., Darcis, M., & Helmig, R. (2010). A study on pressure evolution in a sand channel system during CO2 injection. In Greenhouse Gas Control Technologies (GHGT10), 19.09.2010 - 23.09.2010, Amsterdam, The Netherlands.
  30. Mosthaf, K., Class, H., Flemisch, B., Helmig, R., Leijnse, T., & Rybak, I. (2009). Multi-component modeling of porous-media flow coupled with free flow. In European Geosciences Union (EGU) - General Assembly, 20.04.2009 - 24.04.2009, Wien, Österreich.
  31. Darcis, M., Class, H., & Flemisch, B. (2008). Coupling Models of Different Complexity for the Simulation of CO2 Storage in Saline Aquifers. In 9th International Conference on Greenhouse Gas Control Technologies (GHGT9), 16.11.2008 - 20.11.2008, Washington DC, USA.
  32. Winkler, A., Class, H., & Helmig, R. (2002). An Efficient Solution Technique for the Numerical Simulation of Thermally Enhanced Soil Vapour Extraction. In International Groundwater Symposium: “Bridging the Gap between Measurement and Modeling in Heterogeneous Media”, 25.03.2002 - 28.03.2002, Berkeley, USA.

Supervised student assignements

  1. Coupling between a detailed model and a large-scale model for exchanging density-dependent salt fluxes. (2022). (Masterarbeit). Universität Stuttgart, Institut für Wasser-und Umweltsystemmodellierung, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung.
  2. 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). Universität Stuttgart, Institut für Wasser-und Umweltsystemmodellierung, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung.
  3. Density-driven dissolution of CO2 in karst water - longterm monitoring and modelling in a water column. (2021). (Masterarbeit). Universität Stuttgart, Institut für Wasser-und Umweltsystemmodellierung, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung.
  4. Modeling calcite dissolution due to density-induced fingering of CO2-enriched water. (2021). (Master’s Thesis).
  5. Kalibrierung eines realistischen Grundwassermodells mit FEPEST. (2020). (Masterarbeit). Universität Stuttgart, Institut für Wasser-und Umweltsystemmodellierung, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung.
  6. Grundlagenuntersuchung zum saugseitigen Filter im DNOX-Fördermodul. (2020). (Masterarbeit). Universität Stuttgart, Institut für Wasser-und Umweltsystemmodellierung, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung.
  7. Experimentelle Visualisierung von Konvektion durch in Wasser gelöstes CO2. (2018). Universität Stuttgart.
  8. Steam Assisted Gravity Drainage - Comparison of continuous and cyclic injection on field and laboratory scale. (2015). (Diplomarbeit). Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung.
  9. Effects of pH Control Techniques on Transport of Zero-Valent Iron Nanoparticles in an Aquifer. (2012). (Master’s Thesis).
  10. Vereinfachte Methoden zur Flutwellenabschätzung. (2011). (Bachelorarbeit). Universität Stuttgart, Institut für Wasserbau.
  11. Steam Injection Technique for In Situ Remediation of Chlorinated Hydrocarbons from Low Permeable Saturated Zones - Experiment and Numerical Approach. (2011). (Diplomarbeit). Universität Stuttgart, Institut für Wasserbau.
  12. Numerical Investigations of Flow through Fractured Porous Media. (2007). (Masterthesis).
  13. Erarbeitung und Implementierung eines Modellkonzepts zur Simulation von Strömungs- und Transportprozessen im menschlichen Gehirn. (2007). (Diplomarbeit). Universität Stuttgart, Institut für Wasserbau.
  14. Entwicklung und Implementierung eines numerischen Modellkonzepts zur Simulation von Alkoholspülungsprozessen in DNAPL-kontaminierten Grundwasserleitern. (2005). (Diplomarbeit). Stuttgart, Institut für Wasserbau.
  15. Numerical Modeling of Methane Adsorption and Transport Processes in Mined Areas. (2005). (Masterthesis).
  16. Numerische Modellierung von Strömungs- und Transportvorgängen für Mehrphasen-Mehrkomponenten-Systeme in geklüftet porösen Medien. (2001). (Diplomarbeit). Technische Universität Braunschweig, Institut für ComputerAnwendungen im Bauingenieurwesen.
  17. Skalenbetrachtungen zur Modellierung von Salzwasserintrusionsprozessen. (2000). (Studienarbeit). Technische Universität Braunschweig, Institut für ComputerAnwendungen im Bauingenieurwesen.
  18. Unterschiedliche Raumdiskretisierungsansätze zur numerischen Modellierung nichtisothermer Dreiphasen-Dreikomponentenströmungen in porösen Medien. (1999). (Diplomarbeit). Technische Universität Braunschweig, Institut für ComputerAnwendungen im Bauingenieurwesen.

Current research projects

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