Dieses Bild zeigt  Rainer Helmig

Prof. Dr.-Ing.

Rainer Helmig

Leiter
Institut für Wasser- und Umweltsystemmodellierung
Lehrstuhl für Hydromechanik und Hydrosystemmodellierung

Magne Espedal Adjunct Professor, University of Bergen

Kontakt

+49 711 685-64741
+49 711 685-60430

Visitenkarte (VCF)

Pfaffenwaldring 61
70569 Stuttgart
Deutschland
Raum: 1.015

Sprechstunde

Im Wintersemester 2020/2021 wird die wöchentliche Sprechstunde dienstags von 13.00 Uhr bis 14.00 Uhr stattfinden. Aufgrund der aktuellen Situation wird keine Sprechstunde vor Ort angeboten. Interessent*innen können sich jederzeit vorab per E-Mail zur Sprechstunde anmelden. Wir werden dann einen genauen Termin für ein virtuelles Treffen vereinbaren.

 

Berufliche Tätigkeiten

Seit 2000: Professor (C4), Institut für Wasser- und Umweltsystemmodellierung, Universität Stuttgart
1998-2020: Professor (C4), Institut für Computeranwendungen im Bauwesen, TU Braunschweig
1997-1998: Vertretungsprofessur (C4), Institut für Computeranwendungen im Bauwesen, TU Braunschweig
1993-1997: Wissenschaftlicher Mitarbeiter, Institut für Wasserbau, Universität Stuttgart
1988-1992: Wissenschaftlicher Mitarbeiter, Institut für Strömungsmechanik und Elektronisches Rechnen im Bauwesen, Universität Hannover
1986-1988: Ingenieur, Land Nordrhein-Westfalen

Akademischer Werdegang

1996: Habilitation (Dr.-Ing. habil.), Universität Stuttgart
1993: Promotion (Dr.-Ing.), Universität Hannover
1986: Diplom Bauingenieurwesen (Dipl.-Ing.), Universität Hannover
1981: Diplom Bauingenieurwesen (Dipl.-Ing. (FH)), Fachhochschule Münster

Print-Version des Lebenslaufs

1995: Dresdner Grundwasserforschungspreis 1995
2008: Lehrpreis für die Vorlesung “Hydromechanik”, Universität Stuttgart
seit 2010: Ordentliches Mitglied der Heidelberger Akademie der Wissenschaften
2012: NWO-von Humboldt Stiftungspreis
2013: Shell lecture 2013, Rice University, Houston, USA
2013: InterPore-Rosette 2013 2015: NGWA Henry Darcy Distinguished Lecturer 2015 seit 2017: Gewähltes Mitglied der Deutschen Akademie der Technikwissenschaften (acatech)
2019: InerPore Honorary Lifetime Membership Award 2019
2019 – 2022: Magne Espedal Adjunct Professor, Universität Bergen
2020: AGU Fellow 2020, American Geophysical Union

seit 1999: Mitglied im Editorial Board der Zeitschrift Advances in Water Resources
seit 2007: Mitglied im Editorial Board der Zeitschrift Computational Geosciences
seit 2009: Studiendekan des Studiengangs „Simulation Technology“ an der Universität Stuttgart
seit 2018: Principal Investigator und Mitglied des Direktoriums im Exzellenzcluster EXC 2075 “Daten-integrierte Simulationswissenschaft” (Simtech) an der Universität Stuttgart
seit 2018: Sprecher und Principal investigator des Sonderforschungsbereiches SFB 1313 “Interface-driven multi-field processes in porous media – flow, transport and deformation” (DFG)

 

Publikationen

  1. article

    1. de Winter, M., Weishaupt, K., Scheller, S., Frey, S., Raoof, A., Hassanizadeh, M., & Helmig, R. (n.d.). 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
    2. Coltman, E., Lipp, M., Vescovini, A., & Helmig, R. (n.d.). Obstacles, Interfacial Forms, and Turbulence: A Numerical Analysis of Soil-Water Evaporation Across Different Interfaces. Transport in Porous Media, 134(2), 275--301. https://doi.org/10.1007/s11242-020-01445-6
    3. Heck, K., Coltman, E., Schneider, J., & Helmig, R. (n.d.). Influence of Radiation on Evaporation Rates: A Numerical Analysis. Water Resources Research, 56(10), e2020WR027332. https://doi.org/10.1029/2020WR027332
    4. 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(9), e2020WR027600. https://doi.org/10.1029/2020WR027600
    5. Weishaupt, K., Terzis, A., Zarikos, I., Yang, G., Flemisch, B., de Winter, D. A. M., & Helmig, R. (n.d.). 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(1), 243--270. https://doi.org/10.1007/s11242-020-01477-y
    6. Ghosh, T., Bringedal, C., Helmig, R., & Sekhar, G. P. R. (n.d.). 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
    7. 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(2), e3298. https://doi.org/10.1002/cnm.3298
    8. Koch, T., Schneider, M., Helmig, R., & Jenny, P. (n.d.). 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
    9. Koch, T., Helmig, R., & Schneider, M. (n.d.). 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/https://doi.org/10.1016/j.jcp.2020.109369
    10. Shokri-Kuehni, S. M. S., Raaijmakers, B., Kurz, T., Or, D., Helmig, R., & Shokri, N. (n.d.). Water Table Depth and Soil Salinization: From Pore-Scale Processes to Field-Scale Responses. Water Resources Research, 56(2), e2019WR026707. https://doi.org/10.1029/2019WR026707
    11. Seitz, G., Helmig, R., & Class, H. (n.d.). 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
    12. 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/https://doi.org/10.1016/j.jcp.2019.109012
    13. Vidotto, Ettore., Koch, Timo., Köppl, Tobias., Helmig, Rainer., & Wohlmuth, Barbara. (n.d.). Hybrid Models for Simulating Blood Flow in Microvascular Networks. Multiscale Modeling & Simulation, 17(3), 1076--1102. https://doi.org/10.1137/18M1228712
    14. Terzis, A., Zarikos, I., Weishaupt, K., Yang, G., Chu, X., Helmig, R., & Weigand, B. (n.d.). Microscopic velocity field measurements inside a regular porous medium adjacent to a low Reynolds number channel flow. Physics of Fluids, 31(4), 042001. https://doi.org/10.1063/1.5092169
    15. Weishaupt, K., Joekar-Niasar, V., & Helmig, R. (n.d.). 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
    16. Zhuang, L., Hassanizadeh, S. M., van Duijn, C. J., Zimmermann, S., Zizina, I., & Helmig, R. (n.d.). Experimental and Numerical Studies of Saturation Overshoot during Infiltration into a Dry Soil. Vadose Zone Journal, 18(1), 180167. https://doi.org/10.2136/vzj2018.09.0167
    17. Yang, G., Terzis, A., Zarikos, I., Hassanizadeh, S. M., Weigand, B., & Helmig, R. (n.d.). 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
    18. Mitra, K., Köppl, T., Duijn, H. van, Pop, I. S., & Helmig, R. (n.d.). Fronts in two-phase porous media flow problems: the effects of hysteresis and dynamic capillarity. Studies in Applied Mathematics, 1906.08134. https://research.tue.nl/en/publications/fronts-in-two-phase-porous-media-flow-problems-the-effects-of-hys
    19. Gläser, D., Flemisch, B., Helmig, R., & Class, H. (n.d.). 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
    20. Bilke, L., Flemisch, B., Kalbacher, T., Kolditz, O., Helmig, R., & Nagel, T. (n.d.). Development of Open-Source Porous Media Simulators: Principles and Experiences. Transport in Porous Media, 130(1), 337--361. https://doi.org/10.1007/s11242-019-01310-1
    21. 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
    22. 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
    23. Vidotto, E., Helmig, R., Schneider, M., & Wohlmuth, B. (n.d.). Streamline method for resolving sharp fronts for complex two-phase flow in porous media. Computational Geosciences, 22(6), 1487--1502. https://doi.org/10.1007/s10596-018-9767-z
    24. 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
    25. 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(3), Article 3. https://doi.org/10.1007/s11242-017-0977-y
    26. 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
    27. Schneider, M., Gläser, D., Flemisch, B., & Helmig, R. (n.d.). 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
    28. 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
    29. 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
    30. 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
    31. 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
    32. 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
    33. 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
    34. 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
    35. 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
    36. 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
    37. 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
    38. 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
    39. 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
    40. 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(2), Article 2. https://doi.org/10.1002/2016WR019983
    41. 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(2), Article 2. https://doi.org/10.1002/2016WR019982
    42. Neuweiler, I., & Helmig, R. (2017). Debates - Hypothesis testing in hydrology: a subsurface perspective. Water Resources Research, 53. https://doi.org/1002/2016WR020047
    43. 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.
    44. 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(6), Article 6. https://doi.org/10.1002/fld.4352
    45. Gläser, D., Dell’Oca, A., Tatomir, A., Bensabat, J., Class, H., Guadagnini, A., Helmig, R., McDermott, C., Riva, M., & Sauter, M. (n.d.). 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
    46. 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
    47. 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.
    48. 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
    49. 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
    50. 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
    51. 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
    52. 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
    53. 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.
    54. 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, 70, Article 70.
    55. 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
    56. 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
    57. 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(2), Article 2. https://doi.org/10.1007/s11242-016-0654-6
    58. 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
    59. 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
    60. Schwenck, N., Flemisch, B., Helmig, R., & Wohlmuth, B. I. (2015). Dimensionally reduced flow models in fractured porous media: crossings and boundaries. Computational Geosciences, 19(6), Article 6. https://doi.org/10.1007/s10596-015-9536-1
    61. 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.
    62. 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
    63. 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
    64. 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.
    65. 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
    66. 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
    67. Faigle, B., Helmig, R., Aavatsmark, I., & Flemisch, B. (2014). Efficient multiphysics modelling with adaptive grid-refinement using an MPFA method. Computational Geosciences, 18(5), Article 5. https://doi.org/10.1007/s10596-014-9407-1
    68. 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
    69. 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
    70. 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
    71. 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
    72. 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
    73. 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
    74. 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(12), Article 12. https://onlinelibrary.wiley.com/doi/10.1002/2013WR013800/full
    75. 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
    76. 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
    77. 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(1), Article 1.
    78. 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.
    79. 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(4), Article 4. https://doi.org/10.1108/17415651211284039
    80. 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., … Wilderer, P. (2012). Integrierter Ansatz zur Wasserforschung und Technologieentwicklung. Korrespondenz Abwasser, 59.
    81. 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(3), Article 3. https://www.math.ualberta.ca/ijnam/Volume-9-2012/No-3-12/2012-03-14.pdf
    82. 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
    83. 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(3), Article 3. https://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0031966
    84. 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
    85. 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
    86. 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(2), Article 2. https://doi.org/10.1029/2011WR010651
    87. 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(9), Article 9. https://doi.org/10.1016/j.advwaters.2011.03.007
    88. 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
    89. 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(8), Article 8. https://doi.org/10.1016, j.advwaters.2011.04.021
    90. 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(12), Article 12. https://doi.org/10.1016/j.advwatres.2011.07.002
    91. 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
    92. 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
    93. 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
    94. 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(1), Article 1. https://www.math.ualberta.ca/ijnam/Volume-9-2012/No-1-12/2012-01-02.pdf
    95. 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.
    96. Szymkiewicz, A., & Helmig, R. (2011). Comparison of conductivity averaging methods for one-dimensional unsaturated flow in layered soils. Advances in Water Resources, 34(8), Article 8. https://doi.org/10.1016/j.advwatres.2011.05.011
    97. 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
    98. 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
    99. 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(2), Article 2. https://doi.org/10.1002/num.20525
    100. 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.
    101. 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
    102. Szymkiewicz, A., Helmig, R., & Kuhnke, H. (2011). Two phase flow in heterogeneous porous media with non-wetting phase trapping. Transport in Porous Media, 86(1), Article 1. https://doi.org/10.1007/s11242-010-9604-x
    103. 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
    104. 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(2), Article 2. https://doi.org/10.1007/s10596-009-9151-0
    105. 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
    106. 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(6), Article 6. https://doi.org/10.1007/s00791-010-0143-3
    107. 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
    108. 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
    109. 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(W12552), Article W12552. https://doi.org/10.1029/2010WR009227
    110. 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(7), Article 7. https://doi.org/10.1016/j.advwatres.2010.04.004
    111. 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
    112. Helmig, R., Weiss, A., & Wohlmuth, B. I. (2009). Variational inequalities for modeling flow in heterogeneous porous media with entry pressure. Computational Geosciences, 13(3), Article 3. https://doi.org/10.1007/s10596-008-9125-7
    113. 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
    114. 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
    115. 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
    116. 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
    117. 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(2), Article 2. https://doi.org/10.2118/107485-PA
    118. 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(3), Article 3. https://doi.org/10.1007/s10596-008-9118-6
    119. 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.
    120. 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(3), Article 3. https://doi.org/10.3970/cmes.2009.053.207
    121. Niessner, J., & Helmig, R. (2009). Multi-physics modeling of flow and transport in porous media using a downscaling approach. Advances in Water Resources, 32(6), Article 6. https://doi.org/10.1016/j.advwatres.2009.02.007
    122. 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(11), Article 11. https://doi.org/10.1002/fld.1926
    123. 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.
    124. 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
    125. 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(9), Article 9. https://doi.org/10.1016/j.advwatres.2007.09.006
    126. 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(9), Article 9. https://doi.org/10.1016/j.advwatres.2008.01.021
    127. 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(9), Article 9. https://doi.org/10.1016/j.advwatres.2008.01.004
    128. Eder, M., Kobus, H., & Helmig, R. (2008). Dreidimensionale Modellierung der Hydrodynamik im Bodensee. Wasserwirtschaft, 98,1.
    129. Helmig, R., Weiss, A., & Wohlmuth, B. I. (2007). Dynamic capillary effects in heterogeneous porous media (No. 3). 11(3), Article 3. https://doi.org/10.1007/s10596-007-9050-1
    130. 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(3), Article 3. https://doi.org/10.1007/s11242-006-9089-9
    131. Niessner, J., & Helmig, R. (2007). Multi-scale modeling of three-phase--three-component processes in heterogeneous porous media. Advances in Water Resources, 30(11), Article 11. https://doi.org/10.1016/j.advwatres.2007.05.008
    132. 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(2), Article 2.
    133. Ebigbo, A., Class, H., & Helmig, R. (2007). CO2 leakage through an abandoned well: Problem-oriented benchmarks (No. 2). 11(2), Article 2. https://doi.org/10.1007/s10596-006-9033-7
    134. 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(7), Article 7. https://doi.org/10.1016/j.advwatres.2005.09.001
    135. 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
    136. Niessner, J., & Helmig, R. (2006). Multi-scale modeling of two-phase - two-component processes in heterogeneous porous media. Numerical Linear Algebra with Applications, 13(9), Article 9. https://doi.org/10.1002/nla.497
    137. Helmig, R., Sheta, H., Meiners, H., & Kunz, E. (2006). Numerische Simulation von Gasströmen im Grubengebäude und im Gebirge (01_02). 142(01_02), Article 01_02.
    138. Helmig, R., Niessner, J., & Class, H. (2006). Recent advances in finite element methods for multi-phase flow processes in porous media (03_04). 20(03_04), Article 03_04. https://doi.org/10.1080/00036810600792154
    139. Helmig, R., Schaap, J., Lehmann, P., Kaestner, A., Flühler, H., & Hassanein, R. (2006). Problem identification and sensitivity analysis for a well-controlled 3d lab-scale experiment.
    140. Class, H., Bielinski, A., Helmig, R., Kopp, A., & Ebigbo, A. (2006). Numerische Simulation der Speicherung von CO2 in geologischen Formationen (No. 4). 78(4), Article 4.
    141. 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(7), Article 7. https://doi.org/10.1016/j.advwatres.2005.01.006
    142. 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 (01_02). 76(01_02), Article 01_02. https://doi.org/10.1016/j.jconhyd.2004.07.009
    143. Manthey, S., Hassanizadeh, S. M., & Helmig, R. (2005). Macro-scale dynamic effects in homogeneous and heterogeneous porous media (01_02). 58(01_02), Article 01_02. https://doi.org/10.1007/s11242-004-5472-6
    144. Hilfer, R., & Helmig, R. (2004). Dimensional analysis and upscaling of two-phase flow in porous media with piecewise constant heterogeneities (No. 10). 27(10), Article 10. https://doi.org/10.1016/j.advwatres.2004.07.003
    145. 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 (03_04). 42(03_04), Article 03_04.
    146. 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
    147. Hinkelmann, R., Paul, M., Helmig, R., & Breiting, T. (2004). New media in environmental and water-related engineering education (No. 2). 13(2), Article 2.
    148. 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
    149. 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
    150. Brevdo, L., Helmig, R., Haragus-Courcelle, M., & Kirchgässner, K. (2001). Permanent fronts in two-phase flows in a porous medium (No. 3). 44(3), Article 3. https://doi.org/10.1023/A:1010723604900
    151. Bastian, P., & Helmig, R. (1999). Efficient fully-coupled solution techniques for two phase flow in porous media. Parallel multigrid solution and large scale computations. Advances in Water Resources, 23(3), Article 3. https://doi.org/10.1016/S0309-1708(99)00014-7
    152. Huber, R. U., & Helmig, R. (1999). Multiphase flow in heterogeneous porous media: A classical finite element method versus an IMPES-based mixed FE/FV approach (No. 8). 29(8), Article 8. https://doi.org/10.1002/(SICI)1097-0363(19990430)29:8<899::AID-FLD715>3.0.CO;2-W
    153. Schulz, V., Bárdossy, A., & Helmig, R. (1999). Conditional statistical inverse modeling in groundwater flow by multigrid methods (No. 1). 3(1), Article 1.
    154. 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(7), Article 7. https://doi.org/10.1016/S0309-1708(98)00050-5
    155. Cirpka, O. A., Frind, E. O., & Helmig, R. (1999). Numerical simulation of biodegradation controlled by transverse mixing (No. 2). 40(2), Article 2. https://doi.org/10.1016/S0169-7722(99)00044-3
    156. Cirpka, O. A., Helmig, R., & Frind, E. O. (1999). Numerical methods for reactive transport on rectangular and streamline-oriented grids (No. 7). 22(7), Article 7. https://doi.org/10.1016/S0309-1708(98)00051-7
    157. Helmig, R., & Huber, R. U. (1998). Comparison of Galerkin-type discretization techniques for two-phase flow in heterogeneous porous media (No. 8). 21(8), Article 8. https://doi.org/10.1016/S0309-1708(97)00023-7
    158. 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.
    159. 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
    160. Helmig, R., & Bastian, P. (1998). Fully-Coupled Solution Techniques for Two Phase Flow in Porous Media. Comparison and Verification.
    161. Cirpka, O. A., Frind, E. O., & Helmig, R. (1998). Streamline-Oriented Grid-Generation of Transport Modelling in Two-Dimensional Domains Including Wells.
    162. Helmig, R., & Zielke, W. (1996). Finite Elemente Simulation von Mehrphasenvorgängen im klüftigen Gestein. 1.
    163. Helmig, R., & Wittum, G. (1995). Vom Grundwassermodell zur Ökosystemmodellierung - Perspektiven der numerischen Hydromechanik-. 6.
    164. Helmig, R., & Braun, C. (1995). Simulation of Two-Phase Flow in Discrete Fracture Systems.
    165. Helmig, R. (1994). Modelling of Multiphase Flow in Fractured Rock.
  2. book

    1. Helmig, R., & Class, H. (2005). Grundlagen der Hydromechanik. Shaker Verlag.
    2. Dietrich, P., Helmig, R., Sauter, M., Hötzl, H., Köngeter, J., & Teutsch, G. (2005). Flow and transport in fractured porous media. Springer-Verlag.
    3. Helmig, R. (1997). Multiphase Flow and Transport Processes in the Subsurface: A Contribution to the Modeling of Hydrosystems. Springer-Verlag.
    4. Helmig, R. (1996). Einführung in die Numerischen Methoden der Hydromechanik (Vol. 86) [Mitteilungsheft]. Eigenverlag des Instituts für Wasserbau, Universität Stuttgart.
  3. incollection

    1. Lipp, M., & Helmig, R. (2020). A Locally-Refined Locally-Conservative Quadtree Finite-Volume Staggered-Grid Scheme. In G. Lamanna, S. Tonini, G. E. Cossali, & B. Weigand (Eds.), Droplet Interactions and Spray Processes (Vol. 121, pp. 149--159). Springer. https://doi.org/10.1007/978-3-030-33338-6
    2. Ackermann, S., Helmig, R., & Fest-Santini, S. (2020). Upscaling of Coupled Free-Flow and Porous-Medium-Flow Processes. In G. Lamanna, S. Tonini, G. E. Cossali, & B. Weigand (Eds.), Droplet Interactions and Spray Processes (Vol. 121, pp. 139--148). Springer. https://doi.org/10.1007/978-3-030-33338-6
    3. Ackermann, S., Helmig, R., & Fest-Santini, S. (2020). Upscaling of Coupled Free-Flow and Porous-Medium-Flow Processes. In G. Lamanna, S. Tonini, G. E. Cossali, & B. Weigand (Eds.), Droplet Interactions and Spray Processes. Springer International Publishing. https://link.springer.com/chapter/10.1007/978-3-030-33338-6_11
    4. Schneider, M., Gläser, D., Flemisch, B., & Helmig, R. (2017). Nonlinear finite-volume scheme for complex flow processes on corner-point grids. In Finite Volumes for Complex Applications VIII - Hyperbolic, Elliptic and Parabolic Problems: FVCA 8, 12.06.2017 - 16.06.2017, Lille. Springer-Verlag. https://link.springer.com/chapter/10.1007/978-3-319-57394-6_44
    5. Ehlers, W., Helmig, R., & Rohde, C. (2014). Journal of Applied Mathematics and Mechanics, Special Issue: Deformation and transport phenomena in porous media,. In Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik: Vol. Vol.94/07_08.
    6. Wolff, M., Cao, Y., Flemisch, B., Helmig, R., & Wohlmuth, B. I. (2013). Multi-point flux approximation L-method in 3D: Numerical convergence and application to two-phase flow through porous media (P. Bastian, J. Kraus, & M. Scheichl R. &. Wheeler, Eds.; No. 12; Issue 12). De Gruyter. https://www.degruyter.com/view/product/182024
    7. Troldborg, M., Nowak, W., Binning, P. J., Bjerg, P. L., & Helmig, R. (2010). Uncertainty estimation of the mass discharge from a contaminated site using a fully Bayesian framework. In M. Schirmer & et al. (Eds.), Groundwater Quality 2010, 13.06.2010 - 18.06.2010, Zürich, Schweiz. IAHS Redbook.
    8. Helmig, R., Niessner, J., Flemisch, B., Wolff, M., & Fritz, J. (2010). Efficient modelling of flow and transport in porous media using multi-physics and multi-scale approaches. In W. Freeden, Z. Nashed, & and T. Sonar, (Eds.), Handbook of Geomathematics. Springer-Verlag. https://www.springer.com/mathematics/applications/book/978-3-642-01545-8
    9. Eichel, H., Helmig, R., Neuweiler, I., & Cirpka, O. A. (2005). Upscaling of Two-Phase Flow Processes in Porous Media. In D. B. & S. M. H. Das (Ed.), Upscaling Multiphase Flow in Porous Media. Springer-Verlag.
    10. Hinkelmann, R., & Helmig, R. (2004). Mehrphasenmodelle für die ungesättigte Bodenzone - neue Modellierungsansätze in der Hydrologie. In Tag der Hydrologie 2004: Wasser- und Stofftransport in heterogenen Einzugsgebieten. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/HinkHel_TagHyd_2004.pdf
    11. 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
    12. Ölmann, U., Hinkelmann, R., & Helmig, R. (2002). Parallel Two-Phase Flow Simulations in Porous Media. In E. & W. J. Krause (Ed.), High Performance Computing in Science and Engineering ’02. Springer-Verlag.
    13. Hinkelmann, R., & Helmig, R. (2002). Numerical Modelling of Transport Processes in the Subsurface. In G. Wefer, D. Billett, D. Hebbelen, B. Jorgensen, & M. & T. van W. Schlüter (Eds.), Ocean Margin Systems. Springer-Verlag. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/OMS_HinHel.zip
    14. 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.
    15. Witte, B., Hinkelmann, R., & Helmig, R. (2002). Development of a Parallel FVM Based Groundwater Flow Model. In M. Breuer & F. & C. Z. Durst (Eds.), 3. International FORTWIHR Conference on High Performance Scientific and Engineering Computing (HPSEC), 12.03.2001 - 14.03.2001, Erlangen (No. 21; Issue 21). Springer-Verlag. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/04.ps.gz
    16. 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
    17. Hinkelmann, R., Sheta, H., Helmig, R., Sauter, E. J., & Schlüter, M. (2000). Numerical Simulation of Water-Gas Flow and Transport Processes in Coastal Aquifers. In K. & Y. I. Sato (Ed.), Groundwater Updates. Springer-Verlag. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/saitama.ps.gz
    18. Hinkelmann, R., Sheta, H., Class, H., & Helmig, R. (2000). A Comparison of Different Model Concepts for Salt Water Intrusion Processes. In F. Stauffer, W. Kinzelbach, & K. & E. H. Kovar (Eds.), ModelCARE 99: International Conference on Calibration and Reliability in Groundwater Modeling - Coping with uncertainty, 20.09.1999 - 23.09.1999, ETH Zurich, Switzerland (No. 265; Issue 265). IAHS Redbook. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/mc.ps.gz
  4. inproceedings

    1. Fetzer, T., Grüninger, C., Flemisch, B., & Helmig, R. (2017, June). On the Conditions for Coupling Free Flow and Porous Medium Flow in a Finite Volume Framework. Finite Volumes for Complex Applications VIII - Hyperbolic, Elliptic and Parabolic Problems: FVCA 8, 12.06.2017 - 16.06.2017, Lille. https://doi.org/10.1007/978-3-319-57394-6_37
    2. 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
    3. Mejri, E., Jambhekar, V. A., Helmig, R., & Rachida, B. (2015, June). A reactive transport model for the co-precipitation of Halite and Gypsum under evaporation from porous media. 6th International Conference on Approximation Methods and Numerical Modelling in Environment and Natural Resources MAMERN Conference », University of Pau, France. Mamern VI 2015, Pau, France.
    4. Köppl, T., Helmig, R., & Wohlmuth, B. I. (2015, October). A multi-scale model for mass transport in arteries and tissue. 3rd International Workshop on Computational Engineering CE 2014, 06.10.2014 - 10.10.2014, Universität Stuttgart.
    5. Richter, T., Rudlof, S., Adjibadji, B., Bernlöhr, H., Grüninger, C., Munz, C.-D., Rohde, C., & Helmig, R. (2012, January). ViPLab - A Virtual Programming Laboratory for Mathematics and Engineering. 2011 IEEE International Symposium on Multimedia (ISM), 05.12.2011 - 07.12.2011, Dana Point, California USA.
    6. Kissinger, A., Helmig, R., & Ebigbo, A. (2012). Modellierung des Transports von Frack-Fluiden, Lagerstättenwasser und Methan. In W. Frenz & P. K. andAxel Preuße (Eds.), 14. Aachener Altlasten- und Bergschadenkundliches Kolloquium: Unkonventionelle Gasgewinnung in NRW, 03.07.2012, Aachen (Vol. 99). GDMB Gesellschaft.
    7. Oladyshkin, S., Class, H., Helmig, R., & Nowak, W. (2011). Data-driven framework for history matching: application to carbon dioxide storage in geological formations. European Geosciences Union (EGU) - General Assembly, 03.04.2011 - 08.04.2011, Vienna, Austria, Vol.13(EGU2011-11), Article EGU2011-11.
    8. 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.
    9. 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.
    10. Enzenhöfer, R., Nowak, W., & Helmig, R. (2010). Using probabilistic well vulnerability criteria for a risk-based preventive drinking water safety concept. In M. Schirmer & et al. (Eds.), Groundwater Quality 2010, 13.06.2010 - 18.06.2010, Zürich, Schweiz. IAHS Redbook. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/S84REnzenhofer_review.pdf
    11. Enzenhöfer, R., Helmig, R., Nowak, W., & Binning, P. J. (2010, December). Uncertainty in Model parameter Estimates and Impacts on Risk and Decision Making in the Subsurface, Abstract H42D-05. AGU Fall Meeting 2010, 13.12.2010 - 17.12.2010, San Francisco, USA.
    12. Troldborg, M., Nowak, W., Binning, P. J., Bjerg, P. L., & Helmig, R. (2009, September). Quantifying uncertainty in mass discharge estimates from contaminated sites using a fully Bayesian framework. ModelCARE: Calibration and Reliability in Groundwater Modeling - Managing Groundwater and the Environment, 20.09.2009 - 23.09.2009, Wuhan, China.
    13. 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.
    14. Cao, Y., Helmig, R., & Wohlmuth, B. I. (2008). The influence of the boundary discretization on the multipoint flux approximation L-method. In R. Eymard & J. M. Hérard (Eds.), Finite Volumes for Complex Applications V - Problems and Perspectives, 08.06.2008 - 13.06.2008, Aussois. Wiley - VCH Verlag.
    15. 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.
    16. Kopp, A., Probst, P., Class, H., Hurter, S., & Helmig, R. (2008, November). Estimation of CO2 Storage Capacity Coefficients in Geologic Formations. 9th International Conference on Greenhouse Gas Control Technologies (GHGT9), 16.11.2008 - 20.11.2008, Washington DC, USA.
    17. Flemisch, B., & Helmig, R. (2008). Numerical investigation of a mimetic finite difference method. In R. Eymard & J. M. Hérard (Eds.), Finite volumes for complex applications V - problems and perspectives, 08.06.2008 - 13.06.2008, Aussois, France. Wiley - VCH Verlag. https://www.iste.co.uk/index.php?p=a&ACTION=View&id=220
    18. Flemisch, B., Fritz, J., Helmig, R., Niessner, J., & Wohlmuth, B. I. (2007). DUMUX: a multi-scale multi-physics toolbox for flow and transport processes in porous media. In A. Ibrahimbegovic & F. Dias (Eds.), ECCOMAS Thematic Conference on Multi-scale Computational Methods for Solids and Fluids, 28.11.2007 - 30.11.2007, Paris, France. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/cachan_flemisch.pdf
    19. Ochs, S. O., Class, H., Helmig, R., & Acosta, M. (2007). Simulation of multiphase multicomponent processes in the diffusion layer of PEM fuel cells. In M. Qintard (Ed.), Eurotherm 81, ALbi, France, 04.06.2007 - 06.06.2007, Albi, France.
    20. Freiboth, S., Class, H., & Helmig, R. (2007). Numerical Simulation of Multiphase Multicomponent Processes Considering Structural Alterations of Porous Media - a Phenomenological Model. In T. Schanz (Ed.), Theoretical and Numerical Unsaturated Soil Mechanics. Springer-Verlag.
    21. 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).
    22. 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.
    23. Niessner, J., & Helmig, R. (2006, June). Multi-scale modeling of two-phase-two-component processes in heterogeneous porous media. 16. International Conference on Computational Methods in Water Resources, 18.06.2006 - 22.06.2006, Copenhagen, Denmark. https://proceedings.cmwr-xvi.org/getFile.py/access?contribId=110&sessionId=10&resId=0&materialId=paper&confId=a051
    24. Ebigbo, A., Bielinski, A., Kopp, A., Class, H., & Helmig, R. (2006, June). Numerical Modeling of CO2 Sequestration with MUFTE-UG. http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/CMWR2006UniStuttgart.pdf
    25. Helmig, R., & Sheta, H. (2005, September). Numerische Simulation von Gasströmen im Grubengebäude und im Gebirge. 4. Internationale Grubengas-Tage, 15.09.2005 - 16.09.2005, Bochum.
    26. 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.
    27. Manthey, S., Oung, O., Hassanizadeh, S. M., & Helmig, R. (2004). Dynamic capillary pressure effects in two-phase flow in heterogeneous porous media. In C. T. Miller, W. F. Farthing, & W. G. & G. F. P. Gray (Eds.), 15. International Conference on Computational Methods in Water Resources, 13.06.2004 - 17.06.2004, Chapel Hill, North Carolina, USA (Vol. 1). Elsevier Science Publishers B.V.
    28. 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.
    29. Niessner, J., Helmig, R., Jakobs, H., & Roberts, J. (2004). Interface condition and exact linearization in the Newton iterations for two-phase flow in heterogeneous porous media. In C. T. Miller, W. F. Farthing, & W. G. & G. F. P. Gray (Eds.), 15. International Conference on Computational Methods in Water Resources, 13.06.2004 - 17.06.2004, Chapel Hill, North Carolina, USA (Vol. 1). Elsevier Science Publishers B.V. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/niessner_2004.pdf
    30. Hinkelmann, R., Breiting, T., Kobayashi, K., Helmig, R., & Sheta, H. (2004). Application of Hydroinformatic Methods and Techniques for Complex Systems - Quantification of Methane Migration Processes from Abandoned Coal Mines. In S. Y. Liong & K. K. & V. B. Phoon (Eds.), 6. International Conference on Hydroinformatics 2004, 21.06.2004 - 24.06.2004, Singapore (Vol. 1). World Scientific Publishing Company. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/hydroinformatics_2004.pdf
    31. Neuweiler, I., Cirpka, O. A., Eichel, H., & Helmig, R. (2004). Infiltration of DNAPL into heterogeneous water-saturated soil with different connectivity properties. In C. T. Miller, W. F. Farthing, & W. G. & G. F. P. Gray (Eds.), 15. International Conference on Computational Methods in Water Resources, 13.06.2004 - 17.06.2004, Chapel Hill, North Carolina, USA (Vol. 1). Elsevier Science Publishers B.V.
    32. Paul, M., Helmig, R., & Cunningham, A. B. (2004). International Remediation - Development of an online-based course for German and American students. In C. T. Miller, W. F. Farthing, & W. G. & G. F. P. Gray (Eds.), 15. International Conference on Computational Methods in Water Resources, 13.06.2004 - 17.06.2004, Chapel Hill, North Carolina, USA (Vol. 1). Elsevier Science Publishers B.V. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/CMWR_paul.pdf
    33. Bielinski, A., Class, H., & Helmig, R. (2003, October). Numerische Simulation von CO2-Speicherung im Untergrund. 4. Workshop “Porous Media”, 05.12.2002 - 06.12.2002, Blaubeuren.
    34. Kobayashi, K., Hinkelmann, R., & Helmig, R. (2003). Comparison of different model concepts for gas-water processes in the subsurface. In J. & P. P. Ganoulis (Ed.), 30. IAHR Congress: Water Engineering and Research in a Learning Society, 24.08.2003 - 29.08.2003, Thessaloniki, Greece. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Ken_IAHR_03.zip
    35. Sheta, H., Helmig, R., & Hinkelmann, R. (2003). Dreidimensionale numerische Simulation von Methangasmigrationen im Untergrund. Oberhausener Grubengas-Tage 2003 “CMM Technologie” Erfahrungen Und Aussichten in Deutschland Und International, 20.03.2003 - 21.03.2003, Oberhausen, 44, Article 44. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/sheta_oberhausen_2003.pdf
    36. Breiting, T., Hinkelmann, R., Sheta, H., & Helmig, R. (2003). Coupling of hydroinformatic methods and techniques for the simulation of gas-water flow processes in the subsurface. In J. & P. P. Ganoulis (Ed.), 30. IAHR Congress: Water Engineering and Research in a Learning Society, 24.08.2003 - 29.08.2003, Thessaloniki, Greece. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Breiting_IAHR_03.zip
    37. Süß, M., Eichel, H., & Helmig, R. (2003, October). Multvariater statistischer Ansatz zur Charakterisierung von Strömungs und Transportvorgängen und seine Anwendbarkeit auf numerische Modellierung und Labor- und Feldexperimente: Verifikation der Ergebnisse durch numerische Simulation. 4. Workshop “Porous Media”, 05.12.2002 - 06.12.2002, Blaubeuren.
    38. Paul, M., Müller, M., Hinkelmann, R., Helmig, R., & Kaule, G. (2003). Development of an interactive learning module for GIS-supported groundwater flow simulation. In J. & P. P. Ganoulis (Ed.), 30. IAHR Congress: Water Engineering and Research in a Learning Society, 24.08.2003 - 29.08.2003, Thessaloniki, Greece. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Paul_IAHR_03.zip
    39. Breiting, T., Hinkelmann, R., & Helmig, R. (2003). Kopplung von hydroinformatischen Methoden und Techniken für die Simulation von Gas-Wasser-Strömungsprozessen im Untergrund. Oberhausener Grubengas-Tage 2003 “CMM Technologie” Erfahrungen Und Aussichten in Deutschland Und International, 20.03.2003 - 21.03.2003, Oberhausen, 44, Article 44. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/breiting_gastage.zip
    40. Hinkelmann, R., Helmig, R., Paul, M., & Breiting, T. (2003). Teleteaching and Telelearning in Environmental and Water-Related Engineering Education. In J. & P. P. Ganoulis (Ed.), 30. IAHR Congress: Water Engineering and Research in a Learning Society, 24.08.2003 - 29.08.2003, Thessaloniki, Greece. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/Phillip_IAHR_03.zip
    41. Jakobs, H., Bielinski, A., Class, H., & Helmig, R. (2002). Modeling of heterogeneities for twophase flow in the subsurface. International Conference on Multifield Problems, 08.04.2002 - 10.04.2002, Stuttgart, 12(WOS:000189408100035), Article WOS:000189408100035.
    42. 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.
    43. Gebauer, S., Neunhäuserer, L., Kornhuber, R., Ochs, S. O., Hinkelmann, R., & Helmig, R. (2002). Equidimensional Modelling of Flow and Transport Processes in Fractured Porous Systems I. In S. M. Hassanizadeh, R. J. Schotting, & W. G. & G. F. P. Gray (Eds.), 14. International Conference on Computational Methods in Water Resources, 23.06.2002 - 28.06.2002, Delft, The Netherlands (Vol. 1). Elsevier Science Publishers B.V. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/delft01.ps
    44. Kobayashi, K., Hinkelmann, R., Sheta, H., & Helmig, R. (2002). Scale-Dependent Influences of Geostatistical Permeability Distributions on Gas-Water Flow Processes. In K. & Z. H. Kovar (Ed.), 4. International Conference on Calibration and Reliability in Groundwater Modelling (ModelCARE 2002), 17.06.2002 - 20.06.2002, Prague, Czech Republic (Vol. 2). Acta Universitatis Carolinae - Geologica. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/modelcare_02.zip
    45. 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.
    46. Ölmann, U., Hinkelmann, R., Manthey, S., Lang, S., & Helmig, R. (2002). Parallel Numerical Simulation with MUFTE-UG: Two-Phase Flow Processes in the Subsurface. In I. D. Cluckie, D. Han, & J. P. & S. H. Davis (Eds.), 5. International Conference on Hydroinformatics 2002, 01.07.2002 - 05.07.2002, Cardiff, Wales, UK (Vol. 2). IWA Publishing. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Hydroinformatics_2002.ps.gz
    47. Ochs, S. O., Hinkelmann, R., Neunhäuserer, L., Süß, M., Helmig, R., Gebauer, S., & Kornhuber, R. (2002, September). Adaptive methods for the equidimensional modelling of flow and transport processes in fractured aquifers. 5. International Conference on Hydroscience and Engineering, ICHE2002, Advances in Hydro-Science and -Engineering, 17.09.2002 - 21.09.2002, Warschau, Poland. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/ochs2002.zip
    48. 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.
    49. Paul, M., Hinkelmann, R., Sheta, H., & Helmig, R. (2001). Two-phase flow modelling of flood defense structures. In W. Ehlers (Ed.), IUTAM Symposium on Theoretical and Numerical Methods in Continuum Mechanics of Porous Materials, 05.09.1999 - 10.09.1999, Universität Stuttgart. Kluver Academic Publisher. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/iutam_paul.ps.gz
    50. Bielinski, A., Class, H., Jakobs, H., & Helmig, R. (2001). Numerical Simulation of Desiccation Processes in a Mineral Liner of a Waste-Disposal Site. In T. Schanz (Ed.), 3. Workshop “Teilgesättigte Böden”, 12.10.2001, Bauhaus-Universität Weimar.
    51. Bastian, P., Chen, Z., Ewing, R. E., Helmig, R., Jakobs, H., & Reichenberger, V. (2000). Numerical Simulation of Multiphase Flow in Fractured Porous Media. In Z. Chen & Z.-C. Ewing R. E. &. Shi (Eds.), International Workshop “Numerical Treatment of Multiphase Flows in Porous Media”, 02.08.1999 - 06.08.1999, Beijing, China. Springer-Verlag.
    52. Breiting, T., Hinkelmann, R., Manthey, S., & Helmig, R. (2000, October). Methanausbreitung im Untergrund. Beitrag Zum Darmstädter Wasserbauliches Kolloquium 99, 14.10.1999 - 15.10.1999, Technische Universität Darmstadt. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/dawako.ps.gz
    53. Paul, M., Stauffer, F., Hinkelmann, R., & Helmig, R. (2000). Calibration of a Water-Gas Flow Model for Dike Systems. In L. R. Bentley & W. C. G. & G. F. P. J.F. Sykes C. A. Brebbia (Eds.), 13. International Conference on Computational Methods in Water Resources, 25.06.2000 - 29.06.2000, Calgary, Canada (Vol. 1). A.A. Balkema Publishers. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/cmwr00.ps.gz
    54. Helmig, R., Jakobs, H., Bastian, P., & Reichenberger, V. (2000, December). Gas Water Flow and Transport Processes in Fractured Porous Media. BMWi - BmBF - Unterauftrag Zum Vorhaben 02 E 9027 8.
    55. Hemminger, A., Neunhäuserer, L., & Helmig, R. (2000). The Reliability of a Stochastic Fracture Generator. In F. Stauffer, W. Kinzelbach, & K. & E. H. Kovar (Eds.), ModelCARE 99: International Conference on Calibration and Reliability in Groundwater Modeling - Coping with uncertainty, 20.09.1999 - 23.09.1999, ETH Zurich, Switzerland. IAHS Redbook.
    56. Breiting, T., Hinkelmann, R., & Helmig, R. (2000, July). Modeling of Hydrosystems with MUFTE-UG: Multiphase Flow and Transport Processes in the Subsurface. 4. International Conference on Hydroinformatics 2000, 23.07.2000 - 27.07.2000, Iowa, USA. http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hydroinf_2000.zip
    57. Neunhäuserer, L., Gebauer, S., Hinkelmann, R., Kornhuber, R., & Helmig, R. (2000). Mehrgittermethoden und adaptive Diskretisierungsverfahren zur Simulation von Strömungs- und Transportprozessen in Kluftaquiferen. In O. Kolditz & H.-J. D. & M. W. W. Zielke P. Wriggers (Eds.), 3. Workshop Kluftaquifere “‘Gekoppelte Prozesse in Geosystemen’”, 02.11.2000 - 03.11.2000, Universität Hannover (No. 60; Issue 60). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hannover00.ps.gz
    58. Sheta, H., & Helmig, R. (2000, December). Simulation of multiphase flow processes in porous media considering hysteresis effects.
    59. Jakobs, H., & Helmig, R. (2000). Gas Water Processes in Fractured Porous Media - Comparison of Different Upscaling Methods. In O. Kolditz & H.-J. D. & M. W. W. Zielke P. Wriggers (Eds.), 3. Workshop Kluftaquifere “‘Gekoppelte Prozesse in Geosystemen’”, 02.11.2000 - 03.11.2000, Universität Hannover (No. 60; Issue 60).
    60. Helmig, R., Ewing, R. E., Hinkelmann, R., & Finsterle, S. (2000). Technical Workshop: Modeling of Flow and Transport Processes in the Subsurface. In K. & Y. I. Sato (Ed.), Groundwater Updates. Springer-Verlag. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/workshop.ps.gz
    61. Hemminger, A., Neunhäuserer, L., & Helmig, R. (2000). Festgestein-Aquiferanalog: Experimente und Modellierung, Teilprojekt 3: Einsatz von diskreten Modellansätzen. In O. Kolditz & H.-J. D. & M. W. W. Zielke P. Wriggers (Eds.), 3. Workshop Kluftaquifere “‘Gekoppelte Prozesse in Geosystemen’”, 02.11.2000 - 03.11.2000, Universität Hannover (No. 60; Issue 60).
    62. Class, H., & Helmig, R. (1999, October). Numerische Modellierung von thermisch unterstützter Bodenluftabsaugung. VEGAS Statuskolloquium, 12.10.2001, Universität Stuttgart.
    63. Helmig, R., Hinkelmann, R., & Menzel, K. (1999, December). Numerische Methoden und Informationsverarbeitung am Beispiel der Hydrosystemmodellierung. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/MitBI.ps.gz
    64. Helmig, R., Hinkelmann, R., & Troisi, S. (1999, December). Groundwater: An Interdisciplinary Challenge for Continuing Education and Training on an European Scale. International Symposium - The Learning Society and the Water Environment. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/Paris-Paper-color.zip
    65. Huber, R. U., & Helmig, R. (1999). Numerical Modelling of Multiphase-Multicomponent Systems in Porous Media. In V. & W. Keil Mackens (Ed.), SCCE II (Vol. 1). Springer-Verlag.
    66. Neunhäuserer, L., Hemminger, A., & Helmig, R. (1999, August). Influence of Fracture - Matrix - Interaction on Flow and Transport Processes and the Resulting Effective Parameters in Fractured Porous Systems. 28. IAHR Congress: Hydraulic Engineering for Sustainable Water Resources Management at the Turn of the Millennium, 22.08.1999 - 27.08.1999, Graz, Austria. http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/graz99.zip
    67. Huber, R. U., & Helmig, R. (1999, December). Simulation of Immiscible and Compositional Multiphase Flow in Heterogeneous Porous Media. AMIF Conference.
    68. Sheta, H., Hinkelmann, R., & Helmig, R. (1998, December). Two-Phase Flow in Porous Media for Sharp Interface Problems. International Symposium on Computer Methods for Engineering in Porous Media, Flow and Transport. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/toulon.ps.gz
    69. Hemminger, A., Neunhäuserer, L., Bárdossy, A., & Helmig, R. (1998). Identification of equivalent parameters on different scales in fractured-porous media. In K. P. Holz, W. Bechteler, & S. S. Y. & M. K. Wang (Eds.), 3. International Conference on Hydroscience and Engineering, ICHE1998, Advances in Hydro-Science and -Engineering, 31.08.1998 - 03.09.1998, Cottbus (No. 3; Issue 3). Center for Computational Hydroscience and Engineering.
    70. Helmig, R., & Huber, R. U. (1998, June). Comparison of different discretization techniques for multiphase flow in heterogeneous media. 12. International Conference on Computational Methods in Water Resources, 15.06.1998 - 19.06.1998, Crete, Greece.
    71. Barlag, C., Hinkelmann, R., Helmig, R., & Zielke, W. (1998). Adaptive Methods for Modelling Transport Processes in Fractured Subsurface Systems. In K. P. Holz, W. Bechteler, & S. S. Y. & M. K. Wang (Eds.), 3. International Conference on Hydroscience and Engineering, ICHE1998, Advances in Hydro-Science and -Engineering, 31.08.1998 - 03.09.1998, Cottbus (No. 3; Issue 3). Center for Computational Hydroscience and Engineering. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/ICHE.ps.gz
    72. Huber, R. U., & Helmig, R. (1998, June). Simulation of Immiscible and Compositional Multiphase Flow in Porous Media. 12. International Conference on Computational Methods in Water Resources, 15.06.1998 - 19.06.1998, Crete, Greece.
    73. Fein, E., Graefe, V., Kull, H., Helmig, R., & Jakobs, H. (1998). Dependency of Hydraulic Flow Conditions on Rock Saturation around Repository Drifts. In A. Roth & Kontec (Eds.), International Conference on Radioactive Waste Disposal (Distec ’98), 09.09.1998 - 11.09.1998, Hamburg.
    74. Allan, J., Ewing, J., Helmig, R., & Braun, J. (1998). Scale effects in multiphase flow modeling. In G. B. & R. E. H. Wickramanayake (Ed.), 1. International conference on remediation of chlorinated and recalcitrant compounds, 18.05.1998 - 21.05.1998, Monterey, California, USA. Battelle Press.
    75. Neunhäuserer, L., Fuchs, A., Hemminger, A., & Helmig, R. (1998). Flow and transport processes in fractured porous media. 12. International Conference on Computational Methods in Water Resources, 15.06.1998 - 19.06.1998, Crete, Greece, 2. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Kreta98.ps.gz
    76. Braun, C., Hassanizadeh, S. M., & Helmig, R. (1998, June). Two-Phase Flow in Heterogeneous Porous Media - Effective Parameters and Constitutive Relationships. 12. International Conference on Computational Methods in Water Resources, 15.06.1998 - 19.06.1998, Crete, Greece.
    77. Emmert, M., Helmig, R., & Bächle, W. (1997). Numerical Modelling of Steam Injection in a Vertical Sand-Filled Column. In J. Holly & et al. M. Forrest (Eds.), 27. IAHR Congress: Water for a Changing Global Community, 10.08.1997 - 15.08.1997, San Francisco, USA. ASCE.
    78. Kumar, M. M., Helmig, R., & Hari, P. K. S. (1997, December). Finite Analytic - Strongly Implicit Procedure for Variably Saturated Porous Media. Analytic Based Modeling of Groundwater Flow.
    79. Helmig, R., Jäger, W., Kinzelbach, W., & Knabner, P. (1997). Modeling and Computation in Environmental Sciences. In G. Wittum (Ed.), Notes on Numerical Fluid Mechanics (Vol. 59). Vieweg Verlag.
    80. Cirpka, O. A., & Helmig, R. (1997). Comparison of approaches for coupling of chemistry to transport in groundwater systems. In R. Helmig & P. K. & G. W. W. Jäger W. Kinzelbach (Eds.), Notes on Numerical Fluid Dynamics (No. 59; Issue 59). Vieweg Verlag.
    81. Schäfer, G., Helmig, R., & Le Thiez, P. (1996, December). Vergleich numerischer Methoden zur Simulation von LNAPL-Infiltrationsvorgängen in porösen Medien. Tagungsband ASIM ’96.
    82. Helmig, R., Bastian, P., Braun, C., Emmert, M., Huber, R. U., & Sheta, H. (1996). Architecture of A Modular Program for Simulating Multiphase Flow and Transport Processes in Heterogeneous Media. In A. Müller (Ed.), 2. International Conference on Hydroinformatics 1996, 09.09.1996 - 13.09.1996, Zürich, Schweiz. A.A. Balkema Publishers.
    83. Helmig, R., Emmert, M., & Sheta, H. (1996, December). Problem and Issues of Constitutive Relationships Needed for Accurate Modelling of Multiphase Flow in Heterogeneous Porous Media. Environmental Engineering.
    84. Helmig, R., Emmert, M., & Sheta, H. (1995). Modelling of Multiphase Flow Processes in Heterogeneous Porous Media and Applications. In P. J. & H. W. Pahl (Ed.), Computing in Civil and Building Engineering (Vol. 2). A.A. Balkema Publishers.
    85. Croisé, J., Helmig, R., & Sheta, H. (1995). Numerical Simulation of NAPL-infiltration and redistribution processes in unsaturated heterogeneous porous media, Groundwater Quality: Remediation and Protection (GQ 95). IAHS Publication, 225.
    86. Helmig, R. (1995). Hydraulische Modellierung: analytische Verfahren und numerische Simulation der Grundwasserströmung und des Stofftransportes. DGG-Seminar Hydrologie Und Geophysik, SonderbandIII, Article SonderbandIII.
    87. Lang, U., & Helmig, R. (1995). Numerical Modelling in Fractured Media - Identification of Measured Field Data. IAHS-Symposium on Groundwater Quality: Remediation and Protection, (GQ´95), 255, Article 255.
    88. Helmig, R. (1995, February). Mathematical Modeling and Simulation of Multiphase Processes in Heterogeneous Media with a Finite Element Method. 3. SIAM Conference on Mathematical and Computational Issues in the Geosciences, 08.02.1995 - 10.02.1995, San Antonio, USA.
    89. Croisé, J., Helmig, R., Le Thiez, P., & Schäfer, G. (1995, September). Multiphase flow in porous media: Comparison of numerical simulators. 12. Congrès Français de Mécanique, 04.09.1995 - 08.09.1995, Strasbourg, France.
    90. Betz, C., Emmert, M., Färber, A., Helmig, R., Kaleris, V., & Kobus, H. (1995, December). Soil Remediation by Heat Injection: Experiments and Numerical Modelling. TOUGH Workshop Berkeley.
    91. Helmig, R., Kobus, H., & Braun, C. (1994). Simulation and Interpretation of Multiphase Processes in Porous and Fractured-Porous Media. In A. Peters & others (Eds.), Numerical Methods in Water Resources (Vol. 2). Kluver Academic Publisher.
    92. Cirpka, O. A., & Helmig, R. (1994). Numerical Simulation of Contaminant Transport and Biodegradation in Porous and Fractured-Porous Media. In A. Peters & others (Eds.), Numerical Methods in Water Resources. Kluver Academic Publisher.
    93. Helmig, R. (1994). Modelling of Multiphase Flow in Discrete Fracture Systems with the Finite Element Method. In F. Dracos & Stauffer (Ed.), International Symposium on Transport and Reactive Processes in Aquifers. A.A. Balkema Publishers.
    94. Helmig, R., Braun, C., & Emmert, M. (1994, December). The Application of the Finite Element Method for Modelling Multiphase Flow in Fractured-Porous Media. Journées Numérique de Besançon.
    95. Shao, H., Helmig, R., & Zielke, W. (1994). Simulation of Flow and Transport in Fractured-Porous Media with Coupling from FEM and BEM. In A. Peters & others (Eds.), Numerical Methods in Water Resources. Kluver Academic Publisher.
    96. Zielke, W., Helmig, R., Kröhn, K. P., Shao, H., & Wollrath, J. (1991, December). Discrete Modelling of Transport Processes in Fractured Porous Rock. International Congress on Rock Mechanics.
    97. Zielke, W., & Helmig, R. (1991, December). Grundwasserströmung und Schadstofftransport. FE-Methoden für klüftiges Gestein. Wissenschaftliche Tagung “‘Finite Elemente -Anwendungen in Der Baupraxis.’”
    98. Helmig, R., Kröhn, K. P., & Zielke, W. (1991, March). Methoden zur Modellierung von Strömungs- und Transportprozessen in Felsaquiferen. 6. Wissenschaftliche Tagung Hydrologie Und Wasserwirtschaft, 18.03.1991 - 20.03.1991, Universität Trier.
  5. phdthesis

    1. Helmig, R. (1997). Gekoppelte Strömungs- und Transportprozesse im Untergrund: Ein Beitrag zur Hydrosystemmodellierung (Vol. 91) [Habilitationsschrift]. Universität Stuttgart, Institut für Wasserbau.
    2. Helmig, R. (1993). Theorie und Numerik der Mehrphasenströmungen in geklüftet-porösen Medien (Promotionsschrift No. 34; Issue 34). Universität Hannover, Institut für Strömungsmechanik und Elektronisches Rechnen im Bauwesen.
  6. techreport

    1. Grüninger, C., Fetzer, T., Flemisch, B., & Helmig, R. (2017). Coupling DuMuX and DUNE-PDELab to investigate evaporation at the interface between Darcy and Navier-Stokes flow. In Archive of Numerical Software (No. 2017–1; Archive of Numerical Software, Issues 2017–1). https://doi.org/10.18419/opus-9360
    2. 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
    3. Ebigbo, A., Class, H., & Helmig, R. (2008). Numerische Untersuchung zur CO2 Sequestrierung in geologischen Formationen - problemorientierte Benchmarks (Bericht 10_2008; Vol. LH218, Issue 10_2008).
    4. 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
    5. Helmig, R., Paul, M., Zimmer, S., Brückner-Nieder, U., Hoffmann, M., Schumacher, H., & Lemmer, U. (2007). Abschlussbericht zum Projekt SULKA “Qualitätskonzept für internationale Studiengänge an den Universitäten Stuttgart, Ulm und Karlsruhe” (Bericht 16/2007; Vol. LH217, Issue 16/2007).
    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. Paul, M., Helmig, R., Hoffmann, M., Brückner-Nieder, U., & Zimmer, S. (2006). Zwischenbericht zum Projekt SULKA “Qualitätskonzept für internationale Studiengänge an den Universitäten Stuttgart, Ulm und Karlsruhe” (Bericht 02_2006; Vol. LH212, Issue 02_2006).
    8. Niessner, J., & Helmig, R. (2006). Multi-scale modeling of two-phase - two-component processes in heterogeneous porous media (Bericht 2006/02; Issue 2006/02).
    9. Helmig, R., Class, H., Ölmann, U., & Niessner, J. (2006). Multiphase Processes in Porous Media. In R. Helmig & B. Mielke Alexanderand Wohlmuth (Eds.), Multifield Problems in Solid and Fluid Mechanics (Bericht No. 28; Multifield Problems in Solid and Fluid Mechanics, Issue 28). Springer-Verlag.
    10. 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
    11. Kopp, A., Sheta, H., & Helmig, R. (2005). Parameterstudie zur Abschätzung erzielbarer Methangasmengen aus Gasproduktionsbohrungen mit Hilfe zweidimensionaler Strömungsmodellierung (Bericht 2005/10; Vol. LH207, Issue 2005/10).
    12. Reichenberger, V., Jakobs, H., Bastian, P., Helmig, R., & Niessner, J. (2004). Complex Gas-Water Processes in Discrete Fracture-Matrix Systems. Upscaling, Mass-Conservative Discretization and Efficient Multilevel Solution and Efficient Multilevel Solution (Vol. 130) [Mitteilungsheft].
    13. Sheta, H., Breiting, T., Hinkelmann, R., & Helmig, R. (2004). Dreidimensionale Modellierung von Methanmigrationsprozessen im Untergrund (Bericht 2004/03; Vol. LH202, Issue 2004/03).
    14. Breiting, T., Sheta, H., Kobayashi, K., Hinkelmann, R., & Helmig, R. (2004). Assessment of hazardous gas emission to the surface over former mined areas (Bericht 2004/11; Vol. LH203, Issue 2004/11).
    15. Neunhäuserer, L., Gebauer, S., Ochs, S. O., Hinkelmann, R., Kornhuber, R., & Helmig, R. (2004). Mehrgittermethoden und adaptive Euler-Lagrange-Verfahren zur Simulation von Strömungs- und Transportvorgängen in Kluftaquifersystemen [Bericht]. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/bericht_dfg_04.pdf
    16. Reichenberger, V., Jakobs, H., Bastian, P., & Helmig, R. (2004). A mixed-dimensional finite volume method for multiphase flow in fractured porous media (0 No. 2004–19; Issues 2004–19). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Preprint2004-19.pdf
    17. Niessner, J., Roberts, J., & Helmig, R. (2003). Influence of an Interface Condition and Exact Linearization in the Newton Iterations for Two-Phase Flow in Heterogeneous Porous Media (Bericht RR-4903; Issue RR-4903). https://www.inria.fr/rrrt/rr-4903.html
    18. Ochs, S. O., Hinkelmann, R., & Helmig, R. (2003). Numerische Simulation von Gaspumpversuchen im Untergrund [Bericht].
    19. Helmig, R., & Hinkelmann, R. (2003). Plausibilitätsprüfung zur Modellstudie Elbe [Gutachten].
    20. 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).
    21. Akuzun, S., Kobus, H., & Helmig, R. (2001). Parameteridentifikation für Doppelkontinuum-Modelle: Interpretation von Aquifertests in Karstaquiferen anhand synthetischer lokaler Kluftmmodelle (Bericht 2001/06; Vol. HG281, Issue 2001/06).
    22. Kaleris, V., Lagas, G., Sheta, H., Hinkelmann, R., & Helmig, R. (2001). Task8: Groundwater Flow Modelling [Bericht]. http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/Finalreport_01.zip
    23. Neunhäuserer, L., Gebauer, S., Ochs, S. O., Hinkelmann, R., Kornhuber, R., & Helmig, R. (2001). Mehrgittermethoden und adaptive Euler-Lagrange-Verfahren zur Simulation von Strömungs- und Transportvorgängen in Kluftaquifersystemen (Bericht Hi640/1-1undKo1806/2-1; Issue Hi640/1-1undKo1806/2-1). http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/bericht01.ps.gz
    24. Kaleris, V., Lagas, G., Stroskidu, V., Sheta, H., Hinkelmann, R., & Helmig, R. (2000). Task8: Groundwater Flow Modelling [Bericht]. http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/TASK8_AR1999.zip
    25. Neunhäuserer, L., Hemminger, A., & Helmig, R. (2000). Festgestein-Aquiferanalog: Experimente und Modellierung, Teilprojekt 3: Einsatz von diskreten Modellansätzen (Bericht He2531/1-2,He2531/1-3; Issue He2531/1-2,He2531/1-3).
    26. Breiting, T., Hinkelmann, R., & Helmig, R. (2000). Modellierung und Analyse von Mehrphasenprozessen zur Simulation von Methanausgasung im Untergrund [Bericht]. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/dmt_01.ps.gz
    27. Helmig, R., Bastian, P., Jakobs, H., & Reichenberger, V. (2000). Multiphase Multicomponent Processes in Fractured Porous Media. In BMWi - BmBF - Unterauftrag zum Vorhaben 02 E 9027 8 (BMWi - BmBF - Unterauftrag Zum Vorhaben 02 E 9027 8) [Bericht].
    28. Kaleris, V., Sachinis, G., Sheta, H., Hinkelmann, R., & Helmig, R. (1999). Task8: Groundwater Flow Modelling [Bericht]. http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/Task8_99.zip
    29. 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].
    30. Helmig, R., Färber, A., Class, H., & Emmert, M. (1998). Heat Transport in the Unsaturated Zone - Comparison of Experimental Results and Numerical Simulations (Bericht No. 3; Issue 3).
    31. Nanou-Giannarou, K., & Helmig, R. (1998). Simulation of 3D-Groundwater Flow with Free Surface (Bericht No. 4; Issue 4). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/bericht4.zip
    32. Neunhäuserer, L., Hemminger, A., & Helmig, R. (1997). Festgestein-Aquiferanalog: Experimente und Modellierung, Teilprojekt 3: Einsatz von diskreten Modellansätzen (Bericht 1,He2531/1-1; Issues 1,He2531/1-1).
    33. Huber, R. U., & Helmig, R. (1997). Investigation and Simulation of Three-Phase Flow in Porous Media (Bericht No. 2; Issue 2). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/helmig/bericht2.ps.gz
    34. Helmig, R., & Bastian, P. (1997). Fully-Coupled Solution Techniques for Two Phase Flow in Porous Media. Comparison and Verification [Bericht].
    35. Cirpka, O. A., Helmig, R., & Frind, E. O. (1997). Numerical Methods for Reactive Transport on Rectangular and Streamline-Oriented Grids [Bericht].
    36. Brevdo, L., Helmig, R., & Kirchgässner, K. (1997). Permanent Fronts in Two-Phase Flows in a Porous Medium [Bericht].
    37. Emmert, M., Class, H., & Helmig, R. (1997). Numerische Simulation von isothermen/nichtisothermen Mehrphasenprozessen unter Berücksichtigung der Veränderung der Fluideigenschaften (modular aufgebautes Modellsystem) (Bericht 1997/16; Vol. HG249, Issue 1997/16).
    38. Huber, R. U., & Helmig, R. (1996). Multiphase Flow in Heterogeneous Porous Media: a Classical Finite Element Method Versus an IMPES-Based Mixed FE/FV Approach [Bericht].
    39. Lang, U., Rademacher, S., Helmig, R., & Kobus, H. (1996). Parameteridentifikation für Doppelkontinuums-Modelle - Interpretation von Grundwasserständen in Karstaquiferen anhand synthetischer lokaler Kluftmodelle (Bericht 1996/06; Vol. HG228, Issue 1996/06).
    40. Bastian, P., Helmig, R., Huber, R. U., & Braun, C. (1996). Modelling and efficient solution technique for multiphase flow in porous media [Bericht].
    41. Helmig, R., & Huber, R. U. (1996). Comparison of Galerkin-Type Discretization Techniques for Two-Phase Flow in Heterogeneous Porous Media (Bericht 96/11; Issue 96/11).
    42. Emmert, M., Bächle, W., & Helmig, R. (1996). Numerische Simulation von isothermen / nichtisothermen Mehrphasenprozessen unter Berücksichtigung der Veränderung der Fluideigenschaften (modular aufgebautes Modellsystem) (Bericht 1996/05; Vol. HG227, Issue 1996/05).
    43. Emmert, M., & Helmig, R. (1995). Numerische Simulation von iso-thermen-/nicht-isothermen Mehrphasenprozessen unter Berücksichtigung der Veränderung der Fluid-eigenschaften (modular aufgebautes Modellsystem) (Bericht 1995/07; Vol. HG216, Issue 1995/07).
    44. Emmert, M., Pruess, K., & Helmig, R. (1995). Preliminary Studies of Thermally Enhanced Soil Vapor Extraction (Bericht DE-AC-03-76SF00098; Issue DE-AC-03-76SF00098).
    45. Croisé, J., Helmig, R., & Sheta, H. (1995). Numerische Modellierung von NAPL-Infiltrations-vorgängen in Lockergesteinen (Bericht 1995/01; Vol. HG214, Issue 1995/01).
    46. Braun, C., Helmig, R., & Kobus, H. (1994). Untersuchung zur Grundwassergefährdung durch die Erweiterung der Kläranlage Tübingen (Bericht 1994/08; Vol. HG199, Issue 1994/08).
    47. Braun, C., Helmig, R., Kobus, H., & Sheta, H. (1994). Untersuchung zu den Auswirkungen der Erhöhung der Förderleistung der Trinkwasserbrunnen im unteren Neckertal (Bericht 1994/09; Vol. HG200, Issue 1994/09).
    48. Helmig, R., Braun, C., & Emmert, M. (1994). MUFTE - A Numerical Model for Simulation of Multiphase Flow Processes in Porous and Fractured-Porous Media (Programmdokumentation 1994/20; Vol. HG208, Issue 1994/20).
    49. Braun, C., Helmig, R., & Kobus, H. (1994). Grundwassermodell “Rheintal”,zusätzliche Untersuchungen (Bericht 1994/18; Vol. HG207, Issue 1994/18).
    50. Helmig, R., Moritz, L., & Zielke, W. (1993). Aufbereitung der empirischen Ansätze zur Beschreibung des Kapillardruck-Sättigungs- und des relativen-Permeabilitäts-Sättigungs-Verhaltens in geklüftet-porösen Medien [Bericht].
    51. Helmig, R., & Meyer, U. (1993). Programmbeschreibung ROCKFLOW-SM2-FO, Strömungsmodell für inkompressible Fluide zur Beschreibung freier und gespannter Verhältnisse (1-D und 2-D) (Programmdokumentation 1993/22; Vol. HG185, Issue 1993/22).
    52. Helmig, R., & Zielke, W. (1991). Mehrphasenprozesse in geklüftet-porösen Medien - Stand der Forschung [Bericht].

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