Contact
+49 711 685 64678
+49 711 685 60430
Email
Business card (VCF)
Pfaffenwaldring 61
70569 Stuttgart
Germany
Room: 1.012
Office Hours
By appointment only
Abitur
June 1991 in Münsingen
Academic Degrees
1997: Diploma (Dipl.-Ing), University of Stuttgart
2000: Doctoral Degree (Dr.-Ing.), Technical University of Braunschweig
2008: Habilitation (Dr.-Ing. habil.), University of Stuttgart
Academic Career
1998 - 2000: Doctoral Researcher, Institute of Computer Applications in Civil Engineering, Technical University of Braunschweig
2000 - 2004: Postdoctoral Researcher, Institute for Modelling Hydraulic and Environmental Systems, University of Stuttgart
since 2004: Deputy, Institute for Modelling Hydraulic and Environmental Systems, University of Stuttgart
since 2011: Appointment as "außerplanmäßiger Professor", Institute for Modelling Hydraulic and Environmental Systems,
University of Stuttgart
- 1999: 1st prize of the John F. Kennedy Student Paper competition at the 28th congress of the International Association for Hydraulic Research
- 2006: University of Stuttgart Environmental Engineering student award for
best lecture "Hydromechanics"
Publikations
(Journal-) Articles
- Tatomir, A., Gao, H., Abdullah, H., Pötzl, C., Karadimitriou, N., Steeb, H., Licha, T., Class, H., Helmig, R., & Sauter, M. (2023). Estimation of Capillary-Associated NAPL-Water Interfacial Areas for Unconsolidated Porous Media by Kinetic Interface Sensitive (KIS) Tracer Method. Water Resources Research, 59(12), Article 12. https://doi.org/10.1029/2023WR035387
- Class, H., Keim, L., Schirmer, L., Strauch, B., Wendel, K., & Zimmer, M. (2023). Seasonal Dynamics of Gaseous CO2 Concentrations in a Karst Cave Correspond with Aqueous Concentrations in a Stagnant Water Column. Geosciences, 13, 51. https://doi.org/10.3390/geosciences13020051
- Keim, L., Class, H., Schirmer, L., Wendel, K., Strauch, B., & Zimmer, M. (2023). Data for: Measurement Campaign of Gaseous CO2 Concentrations in a Karst Cave with Aqueous Concentrations in a Stagnant Water Column 2021-2022. https://doi.org/10.18419/darus-3271
- Nissler, E., Scherrer, S., Class, H., Müller, T., Hermannspan, M., Osmancevic, E., & Haslauer, C. (2023). Heat transport from atmosphere through the subsurface to drinking-water supply pipes. Vadose Zone Journal. https://doi.org/10.1002/vzj2.20286
- Weinhardt, F., Deng, J., Hommel, J., Vahid Dastjerdi, S., Gerlach, R., Steeb, H., & Class, H. (2022). Spatiotemporal Distribution of Precipitates and Mineral Phase Transition During Biomineralization Affect Porosity–Permeability Relationships. Transport in Porous Media, 143(2), Article 2. https://doi.org/10.1007/s11242-022-01782-8
- Tsinober, A., Rosenzweig, R., Class, H., Helmig, R., & Shavit, U. (2022). The Role of Mixed Convection and Hydrodynamic Dispersion During CO2 Dissolution in Saline Aquifers: A Numerical Study. Water Resources Research, 58(3), Article 3. https://doi.org/10.1029/2021WR030494
- Winter, R., Valsamidou, A., Class, H., & Flemisch, B. (2022). A Study on Darcy versus Forchheimer Models for Flow through Heterogeneous Landfills including Macropores. Water, 14(4), Article 4. https://doi.org/10.3390/w14040546
- Gläser, D., Schneider, M., Flemisch, B., & Helmig, R. (2022). Comparison of cell- and vertex-centered finite-volume schemes for flow in fractured porous media. Journal of Computational Physics, 448, 110715. https://doi.org/10.1016/j.jcp.2021.110715
- von Wolff, L., Weinhardt, F., Class, H., Hommel, J., & Rohde, C. (2021). Investigation of Crystal Growth in Enzymatically Induced Calcite Precipitation by Micro-Fluidic Experimental Methods and Comparison with Mathematical Modeling. Transport in Porous Media, 137(2), Article 2. https://doi.org/10.1007/s11242-021-01560-y
- Koch, T., Gläser, D., Weishaupt, K., Ackermann, S., Beck, M., Becker, B., Burbulla, S., Class, H., Coltman, E., Emmert, S., Fetzer, T., Grüninger, C., Heck, K., Hommel, J., Kurz, T., Lipp, M., Mohammadi, F., Scherrer, S., Schneider, M., … Flemisch, B. (2021). DuMux 3 – an open-source simulator for solving flow and transport problems in porous media with a focus on model coupling. Computers & Mathematics with Applications. https://doi.org/10.1016/j.camwa.2020.02.012
- Wagner, A., Eggenweiler, E., Weinhardt, F., Trivedi, Z., Krach, D., Lohrmann, C., Jain, K., Karadimitriou, N., Bringedal, C., Voland, P., Holm, C., Class, H., Steeb, H., & Rybak, I. (2021). Permeability Estimation of Regular Porous Structures: A Benchmark for Comparison of Methods. Transport in Porous Media, 138(1), Article 1. https://doi.org/10.1007/s11242-021-01586-2
- Weinhardt, F., Class, H., Dastjerdi, S. V., Karadimitriou, N., Lee, D., & Steeb, H. (2021). Experimental Methods and Imaging for Enzymatically Induced Calcite Precipitation in a microfluidic cell. Water Resources Research, 57, e2020WR029361. https://doi.org/doi.org/10.1029/2020WR029361
- Seitz, G., Mohammadi, F., & Class, H. (2021). Thermochemical Heat Storage in a Lab-Scale Indirectly Operated CaO/Ca(OH)2 Reactor - Numerical Modeling and Model Validation through Inverse Parameter Estimation. Applied Sciences, 11(2), Article 2. https://doi.org/10.3390/app11020682
- Class, H., Bürkle, P., Sauerborn, T., Trötschler, O., Strauch, B., & Zimmer, M. (2021). On the Role of Density-Driven Dissolution of CO2 in Phreatic Karst Systems. Water Resources Research, 57(12), Article 12. https://doi.org/10.1029/2021WR030912
- Seitz, G., Helmig, R., & Class, H. (2020). A numerical modeling study on the influence of porosity changes during thermochemical heat storage. Applied Energy, 259, 114152. https://doi.org/10.1016/j.apenergy.2019.114152
- Beck, M., Rinaldi, A. P., Flemisch, B., & Class, H. (2020). Accuracy of fully coupled and sequential approaches for modeling hydro- and geomechanical processes. Computational Geosciences, 24(4), Article 4. https://doi.org/10.1007/s10596-020-09987-w
- Emmert, S., Davis, K., Gerlach, R., & Class, H. (2020). The Role of Retardation, Attachment and Detachment Processes during Microbial Coal-Bed Methane Production after Organic Amendment. Water, 12(11), Article 11. https://doi.org/10.3390/w12113008
- Emmert, S., Class, H., Davis, K. J., & Gerlach, R. (2020). Importance of specific substrate utilization by microbes in microbially enhanced coal-bed methane production: A modelling study. International Journal of Coal Geology, 229, 103567. https://doi.org/10.1016/j.coal.2020.103567
- Hommel, J., Akyel, A., Frieling, Z., Phillips, A. J., Gerlach, R., Cunningham, A. B., & Class, H. (2020). A Numerical Model for Enzymatically Induced Calcium Carbonate Precipitation. Applied Sciences, 10(13), Article 13. https://doi.org/10.3390/app10134538
- Class, H., Weishaupt, K., & Trötschler, O. (2020). Experimental and Simulation Study on Validating a Numerical Model for CO2 Density-Driven Dissolution in Water. Water, 12(3), Article 3. https://doi.org/10.3390/w12030738
- Gläser, D., Flemisch, B., Class, H., & Helmig, R. (2020). Frackit: a framework for stochastic fracture network generation and analysis. Journal of Open Source Software, 5. https://doi.org/10.21105/joss.02291
- Gläser, D., Flemisch, B., Helmig, R., & Class, H. (2019). A hybrid-dimensional discrete fracture model for non-isothermal two-phase flow in fractured porous media. GEM - International Journal on Geomathematics, 10(1), Article 1. https://doi.org/10.1007/s13137-019-0116-8
- Cunningham, A. B., Class, H., Ebigbo, A., Gerlach, R., Phillips, A., & Hommel, J. (2019). Field-scale modeling of microbially induced calcite precipitation. Computational Geosciences, tbd. https://doi.org/10.1007/s10596-018-9797-6
- Beck, M., & Class, H. (2019). Modelling fault reactivation with characteristic stress-drop terms. Advances in Geosciences, 49, 1--7. https://doi.org/10.5194/adgeo-49-1-2019
- Koch, T., Gläser, D., Weishaupt, K., Ackermann, S., Beck, M., Becker, B., Burbulla, S., Class, H., Coltman, E., Fetzer, T., Flemisch, B., Grüninger, C., Heck, K., Hommel, J., Kurz, T., Lipp, M., Mohammadi, F., Schneider, M., Seitz, G., … Weinhardt, F. (2018). DuMuX 3.0.0. https://doi.org/10.5281/zenodo.2479595
- 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
- Hommel, J., Coltman, E., & Class, H. (2018). Porosity-Permeability Relations for Evolving Pore Space: A Review with a Focus on (Bio-)geochemically Altered Porous Media. Transport in Porous Media, 2(124), Article 124. https://doi.org/10.1007/s11242-018-1086-2
- 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
- Kleinknecht, S., Class, H., & Braun, J. (2017). Experimental study on retardation of a heavy NAPL vapor in partially saturated porous media. Hydrol. Earth Syst. Sci. Discuss., 21.
- 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
- Gläser, D., Dell’Oca, A., Tatomir, A., Bensabat, J., Class, H., Guadagnini, A., Helmig, R., McDermott, C., Riva, M., & Sauter, M. (2016). An Approach Towards a FEP-based Model for Risk Assessment for Hydraulic Fracturing Operations. Energy Procedia, 97, 387--394. https://doi.org/10.1016/j.egypro.2016.10.030
- 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
- Weishaupt, K., Bordenave, A., Atteia, O., & Class, H. (2016). Numerical Investigation on the Benefits of Preheating for an Increased Thermal Radius of Influence During Steam Injection in Saturated Soil. Transport in Porous Media. https://doi.org/10.1007/s11242-016-0624-z
- Kissinger, A., Noack, V., Knopf, S., Konrad, W., Scheer, D., & Class, H. (2016). Regional-scale brine migration along vertical pathways due to CO2 injection - Part 2: a simulated case study in the North German Basin. Hydrology and Earth System Sciences (HESS).
- Scheer, D., Konrad, W., Class, H., Kissinger, A., Knopf, S., & Noack, V. (2016). Regional-scale brine migration along vertical pathways due to CO2 injection - Part 1: the participatory modeling approach. Hydrology and Earth System Sciences (HESS).
- Beck, M., Seitz, G., & Class, H. (2016). Volume-Based Modelling of Fault Reactivation in Porous Media Using a Visco-Elastic Proxy Model. Transport in Porous Media.
- Kissinger, A., Noack, V., Knopf, S., Konrad, W., Scheer, D., & Class, H. (2016). Brine migration along vertical pathways due to CO2 injection - a simulated case study in the North German Basin with stakeholder involvement. https://doi.org/10.5194/hess-2016-281
- Scheer, D., Konrad, W., Class, H., Kissinger, A., Knopf, S., & Noack, V. (2015). Expert involvement in science development: (re-)evaluation of an early screening tool for carbon storage site characterization. International Journal of Greenhouse Gas Control, 37.
- 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
- Class, H., Mahl, L., Ahmed, W., Norden, B., Kühn, M., & Kempka, T. (2015). Matching Pressure Measurements and Observed CO2 Arrival Times with Static and Dynamic Modelling at the Ketzin Storage site. Energy Procedia, 76.
- Kleinknecht, S., Class, H., & Braun, J. (2015). Density-Driven Migration of Heavy NAPL Vapor in the Unsaturated Zone. Vadose Zone Journal, 14.
- Gerbersdorf, S. U., Cimatoribus, C., Class, H., Engesser, K.-H., Helbich, S., Hollert, H., Lange, C., Kranert, M., Metzger, J., Nowak, W., Seiler, T.-B., Steger, K., Steinmetz, H., & Wieprecht, S. (2015). Anthropogenic Trace Compounds (ATCs) in aquatic habitats - Research needs on sources, fate, detection and toxicity to ensure timely elimination strategies and risk management. Environment International, 79, 85–105.
- Schaedle, P., Hubschwerlen, N., & Class, H. (2014). Optimizing the modeling performance for safety assessments of nuclear waste repositories by approximating two-phase flow and transport by single-phase transport simulations. Nuclear Technology, 187.
- Kissinger, A., Noack, V., Knopf, S., Scheer, D., Konrad, W., & Class, H. (2014). Characterization of reservoir conditions for CO2 storage using a dimensionless Gravitational Number applied to the North German Basin. Sustainable Energy Technologies and Assessments, 7. https://doi.org/10.1016/j.seta.2014.06.003
- 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
- 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
- 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
- Walter, L., Binning, P. J., & Class, H. (2013). Predicting salt intrusion into freshwater aquifers resulting from CO2 injection - a study on the influence of conservative assumptions. Advances in Water Resources, 62.
- Kempka, T., Class, H., Görke, U.-J., Norden, B., Kolditz, O., Kühn, M., Walter, L., Wang, W., & Zehner, B. (2013). A dynamic flow simulation code intercomparison based on the revised static model of the Ketzin pilot site. Energy Procedia, 40.
- Juanes, R., & Class, H. (2013). Special issue on computational methods in geologic CO2 sequestration. Advances in Water Resources, 62. https://doi.org/10.1016/j.advwatres.2013.10.012
- Oladyshkin, S., Schröder, P., Class, H., & Nowak, W. (2013). Chaos expansion based Bootstrap filter to calibrate CO2 injection models. Energy Procedia, 40, Article 40. https://doi.org/10.1016/j.egypro.2013.08.046
- Oladyshkin, S., Class, H., & Nowak, W. (2013). Bayesian updating via Bootstrap filtering combined with data-driven polynomial chaos expansions: methodology and application to history matching for carbon dioxide storage in geological formations. Computational Geosciences, 17(4), Article 4. https://doi.org/10.1007/s10596-013-9350-6
- 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
- Bauer, S., Class, H., Ebert, M., Feeser, V., Götze, H., Holzheid, A., Kolditz, O., Rosenbaum, S., Rabbel, W., Schäfer, D., & Dahmke, A. (2012). Modeling, parameterization and evaluation of monitoring methods for CO2 storage in deep saline formations: the CO2-MoPa project. Environmental Earth Sciences, 67. https://doi.org/10.1007/s12665-012-1707-y
- Walter, L., Binning, P. J., Oladyshkin, S., Flemisch, B., & Class, H. (2012). Brine migration resulting from CO2 injection into saline aquifers - An approach to risk estimation including various levels of uncertainty. International Journal of Greenhouse Gas Control, 9. https://www.sciencedirect.com/science/article/pii/S1750583612001077
- 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
- Schäfer, F., Walter, L., Class, H., & Müller, C. (2011). The regional pressure impact of CO2 storage: a showcase study from the North German Basin. Environmental Earth Sciences. https://doi.org/10.1007/s12665-011-1184-8
- 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
- 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
- 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.
- 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
- 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.
- 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
- 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
- Kempka, T., Kühn, M., Class, H., Frykman, P., Kopp, A., Nielsen, C. M., & Probst, P. (2010). Modelling of CO2 arrival time at Ketzin - Part I. International Journal of Greenhouse Gas Control, 4. https://doi.org/10.1016/j.ijggc.2010.07.005
- 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
- Darcis, M., Class, H., & Flemisch, B. (2009). Coupling Models of Different Complexity for the Simulation of CO2 Storage in Saline Aquifers. Energy Procedia, 1. https://www.sciencedirect.com/science/article/pii/S187661020900232X
- 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
- 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.
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- Bielinski, A., Kopp, A., Schütt, H., & Class, H. (2008). Monitoring of CO2 plumes during storage in geological formations using temperature signals: numerical investigation (No. 2). 2, Article 2. https://doi.org/10.1016/j.ijggc.2008.02.008
- 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
- 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
- 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.
- Helmig, R., Niessner, J., & Class, H. (2006). Recent advances in finite element methods for multi-phase flow processes in porous media (No. 03_04). 20(03_04), Article 03_04. https://doi.org/10.1080/00036810600792154
- 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
- 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
- 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
- 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.
- 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
- Class, H., Mahl, L., Ahmed, W., Norden, B., Kühn, M., & Kempka, T. (1963). Matching pressure measurements and observed CO2 arrival times with static and dynamic modelling at the Ketzinstorage site.
Monograhs
- Scheer, D., Class, H., & Flemisch, B. (2021). Subsurface Environmental Modelling Between Science and Policy. Springer International Publishing. https://doi.org/10.1007/978-3-030-51178-4
- Helmig, R., & Class, H. (2005). Grundlagen der Hydromechanik. Shaker Verlag.
Datasets
- Keim, L., Class, H., Schirmer, L., Strauch, B., Wendel, K., & Zimmer, M. (2023). Code for: Seasonal Dynamics of Gaseous CO2 Concentrations in a Karst Cave Correspond With Aqueous Concentrations in a Stagnant Water Column. DaRUS. https://doi.org/10.18419/darus-3276
- Lee, D., Weinhardt, F., Hommel, J., Class, H., & Steeb, H. (2023). Time resolved micro-XRCT dataset of Enzymatically Induced Calcite Precipitation (EICP) in sintered glass bead columns. DaRUS. https://doi.org/10.18419/darus-2227
- Weinhardt, F., Deng, J., Steeb, H., & Class, H. (2022). Optical Microscopy and log data of Enzymatically Induced Calcite Precipitation (EICP) in microfluidic cells (Quasi-2D-structure). DaRUS. https://doi.org/10.18419/darus-1799
- Weinhardt, F., Class, H., Vahid Dastjerdi, S., Karadimitriou, N., Lee, D., & Steeb, H. (2021). Optical Microscopy and pressure measurements of Enzymatically Induced Calcite Precipitation (EICP) in a microfluidic cell. DaRUS. https://doi.org/10.18419/darus-818
- Vahid Dastjerdi, S., Steeb, H., Ruf, M., Lee, D., Weinhardt, F., Karadimitriou, N., & Class, H. (2021). micro-XRCT dataset of Enzymatically Induced Calcite Precipitation (EICP) in a microfluidic cell. DaRUS. https://doi.org/10.18419/darus-866
Contributions to anthologies
- Class, H., Kissinger, A., Knopf, S., Konrad, W., Noack, V., & Scheer, D. (2015). Combined Natural and Social Science Approach for Regional-Scale Characterisation of CO2 Storage Formations and Brine Migration Risks (CO2BRIM) (No. 22; Issue 22). Springer-Verlag.
- 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
- 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.
- 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 (Nos. II–7; Issues II–7). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/main.ps.gz
- 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
Conference papers
- Guthke, A., Bakhshipour, A. E., de Barros, F. P. J., Class, H., Daniell, J. E., Dittmer, U., Friedrich, M., Haas, J., Kropp, C., Merz, B., Oladyshkin, S., Schäfer, A., Sinsbeck, M., Straub, D., Terheiden, K., Wieprecht, S., & Nowak, W. (2020). A unified framework for quantitative interdisciplinary flood risk assessment. AGU.
Talks
- Beck, M. (2019). Conceptual approaches for the analysis of coupled hydraulic and geomechanical processes [Phdthesis, Stuttgart : Eigenverlag des Instituts für Wasser- und Umweltsystemmodellierung der Universität Stuttgart]. http://dx.doi.org/10.18419/opus-10418
- Hommel, J., Phillips, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2018). Modeling field-scale applications of microbially induced calcium carbonate precipitation. In Computational Methods in Water Resources (CMWR) XXII, 04.06.2018 - 07.06.2018, St. Malo, Frankreich. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2018/CMWR2018Poster.pdf
- Class, H., Walter, L., Darcis, M., Ebigbo, A., & Flemisch, B. (2011). Simulation-based concepts for the evaluation of risk scenarios associated with geological storage of carbon dioxide. In Kolloquium Wasserwesen, TU Berlin, 05.05.2011, Berlin. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/vortraege/2011/simulation_based
- Class, H. (2010). Predictive modelling? �On matching arrival times and pressure data in Ketzin. In Norwegian-German workshop on Geological Storage of CO2, 01.06.2010 - 02.06.2010, Potsdam. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/vortraege//N-D-CCS-Workshop-Potsdam-June2010-Class.pdf
- Class, H., Darcis, M., Walter, L., & Kempka, T. (2010). Coupling models of different complexity on different spatial and temporal scales for simulating CO2 storage scenarios. In Rencontres Scientifiques, High Performance Computing for CO2 Geological Storage, 14.06.2010 - 16.06.2010, Paris, France.
- Class, H., Darcis, M., & Walter, L. (2009). Coupled models for approaching the large scales in simulating CO2 storage in geological formations. In International Workshop on Coupled Models in Energy, Hydrological and Climate Research, 08.10.2009 - 09.10.2009, Berlin.
- Class, H., Ebigbo, A., Darcis, M., Walter, L., Flemisch, B., Kopp, A., & Helmig, R. (2009). Intercomparison of codes and models - How can we improve reliability and understanding of model predictions for CO2 storage? In Workshop on Modelling and Risk Assessment of Geological Storage of CO2, 03.08.2009 - 07.08.2009, Longyearbyen, Svalbard.
- Class, H. (2009). Strömungen durch poröse Medien und in komplexen Strukturen - Beispiele und Konzepte zur Kopplung von Modellierungsansätzen.
- Class, H., Ebigbo, A., Kopp, A., & Helmig, R. (2008). Numerical Investigation of CO2 Sequestration in Geological Formations - Problem-Oriented Benchmarks. In Geotechnologien Statusseminar, 20.10.2008 - 21.10.2008, Stuttgart, Haus der Wirtschaft.
- Class, H. (2008). Models for non-isothermal compositional gas-liquid flow and transport in porous media [Habilitationsschrift, Universität Stuttgart, Institut für Wasserbau]. https://elib.uni-stuttgart.de/opus/volltexte/2009/3847/pdf/class_habil_version1.1.pdf
- Class, H. (2008). Numerical Models for Carbon Dioxide Storage in Geological Formations. In Workshop on Numerical Models for Carbon Dioxide Storage in Geological Formations, 02.04.2008 - 04.04.2008, Stuttgart.
- Class, H., Ebigbo, A., Helmig, R., & Darcis, M. (2007). Numerical Investigation of CO2 Sequestration in Geological Formations - Problem-Oriented Benchmarks. In Geotechnologien Statusseminar, 15.11.2007 - 16.11.2007, Hamburg. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/vortraege/BENCHMARKS_HAMBURG_07.pdf
- Class, H., Kopp, A., & Ebigbo, A. (2007). Modeling of CO2 storage in geological formations. In IAHR Stuttgart Student Chapter Colloquium 2007, 31.10.2007 - 31.10.2007, Stuttgart.
- Class, H., Ebigbo, A., Kopp, A., & Helmig, R. (2007). Numerical modeling of CO2 storage in geological formations - recent developments and challenges. In 1. French-German Symposium on Geological Storage of CO2, 21.06.2007 - 22.06.2007, Potsdam.
- Class, H., Ebigbo, A., Kopp, A., & Helmig, R. (2007). Reliability of numerical models for simulating CO2 storage in deep geological formations. In Deutsche Geophysikalische Gesellschaft - Jahrestagung, 26.03.2007 - 29.03.2007, Aachen. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/vortraege/dgg-aachen-07_mod.pdf
- Class, H. (2007). Models for Non-Isothermal Compositional Gas-Liquid Flow and Transport in Porous Media. In Selected Topics and International Network Lectures - Seminar Lehrstuhl für Hydromechanik und Hydrosystemmodellierung, 12.02.2007 - 13.02.2007, Stuttgart.
- Class, H., & Ebigbo, A. (2006). Numerical investigation of CO2 sequestration in geological formations - problem-oriented benchmarks. In Geotechnologien Statusseminar, 22.11.2005 - 23.11.2005, Hannover.
- Kühn, M., Kempka, T., & Class, H. (2006). Development and Evaluation of Innovative Strategies for Sequestration and Permanent Immobilisation of CO2 in Geological Formations. In Geotechnologien Statusseminar, 21.11.2006 - 22.11.2006, Freiberg.
- Class, H., & Ochs, S. O. (2005). Ein Konzept zur Kopplung numerischer Module für die Simulation von Schadstoffversickerung, -susbreitung und thermischer Sanierung. In J. Braun & H. P. & M. M. Koschitzky (Eds.), Ressource Untergrund, 10 Jahre VEGAS: Forschung und Technologieentwicklung zum Schutz von Grundwasser und Boden, 28.09.2005 - 29.09.2005, Universität Stuttgart (No. 145; Issue 145).
- Class, H., Bielinski, A., & Ochs, S. O. (2004). Applications of non-isothermal multiphase multicomponent models for flow and transport in porous media. In Progress in Industrial Mathematics at ECMI 2004, 21.06.2004 - 25.06.2004, Eindhoven University of Technology.
- Class, H., & Bielinski, A. (2003). Numerical modeling of nonisothermal multiphase multicomponent processes: General concepts, basic assumptions and some applications. In Workshop on Aquifer Storage of CO2, 06.11.2003 - 07.11.2003, University of Bergen, Norway.
- Class, H., & Acosta, M. (2003). Numerical modelling of non-isothermal multiphase multicomponent processes in porous media: 1. General concepts, basic assumptions, and example applications 2. The model concept applied to describe the processes in the cathode diffusion layer of a PEM-fuel cell. In MACSI-Net Working Group 14: “Filtration Problems in porous media and paper manufacturing” (Workshop 2003), 21.11.2003 - 22.11.2003, Universität Stuttgart.
- 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.
- 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.
- Class, H., & Helmig, R. (1999, October). Numerische Modellierung von thermisch unterstützter Bodenluftabsaugung. VEGAS Statuskolloquium, 12.10.2001, Universität Stuttgart.
- Class, H. (1999, August). Numerical Simulation of Non-isothermal Steam Injection Processes in NAPL-Contaminated Porous Media. 28. IAHR Congress: Hydraulic Engineering for Sustainable Water Resources Management at the Turn of the Millennium, 22.08.1999 - 27.08.1999, Graz, Austria.
- Sheta, H., Class, H., & Helmig, R. (1998). Numerische Simulation von isothermen/ nichtisothermen Mehrphasenströmungen unter Berücksichtigung der Veränderung der Fluideigenschaften. In PWAB-Statuskolloquium, 17.03.1998 - 18.03.1998, Karlsruhe (PWAB-Statuskolloquium, 17.03.1998 - 18.03.1998, Karlsruhe) [Bericht].
Posters
- Seitz, G., Helmig, R., & Class, H. (2019). Model Coupling in thermochemical Heat Storage. In InterPore 2019. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2019/2019_SeitzG_Interpore_Poster.pdf
- Scherrer, S., Haslauer, C., Class, H., Klaas, N., & Braun, J. (2019). Änalytische Berechnung periodisch betriebener Wärmequellen im Untergrund" (Poster). Der Geothermiekongress 2019, München.
- Hommel, J., Phillips, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2018). Modeling field-scale applications of microbially induced calcium carbonate precipitation. In Computational Methods in Water Resources (CMWR) XXII, 04.06.2018 - 07.06.2018, St. Malo, Frankreich. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2018/CMWR2018Poster.pdf
- Beck, M., & Class, H. (2018). Comparison of sequential and fully-coupled approaches for flow and geomechanics. In European Geosciences Union (EGU) - General Assembly, 08.04.2018 - 13.04.2018, Vienna, Austria.
- Hommel, J., Phillips, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2018). Modeling field-scale applications of microbially induced calcium carbonate precipitation. In 2nd International Conference on Simulation Technology (SimTech 2018), 26.03.2018 - 28.03.2018, Stuttgart. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2018/SimTech2018Poster.pdf
- Seitz, G., Helmig, R., & Class, H. (2017). Numerical Model of a Ca(OH)2 / CaO thermochemical heat storage reactor. In 9th International Conference on Porous Media & Annual Meeting - InterPore 2017, 08.05.2017 - 11.05.2017, Rotterdam, The Netherlands. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2017/Seitz_IWS_Interpore2017.pdf
- Glaeser, D., Helmig, R., Flemisch, B., & Class, H. (2017). A discrete fracture model using a cell-centered finite volume scheme with multi-point flux approximation. In 9th International Conference on Porous Media & Annual Meeting (InterPore), 08.05.2017 - 11.05.2017, Rotterdam, Netherlands. https://www.new.interpore.org/interpore-rotterdam-2017
- Hommel, J., Ebigbo, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2016). Finding a balance between accuracy and computational effort for modeling biomineralization. In 1st SRP NUPUS Meeting, 05.10.2016 - 07.10.2016, Mühlhausen im Täle. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2016/Hommel_NUPUS_Poster_2016.pdf
- Hommel, J., Ebigbo, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2016). Finding a balance between accuracy and effort for modeling biomineralization. In Gordon Research Conference on Flow and Transport in Permeable Media, 01.08.2016 - 05.08.2016, Girona, Spanien. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2016/Gordon_Hommel_2016.pdf
- Hommel, J., Ebigbo, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2016). Finding a balance between accuracy and effort for modeling biomineralization. In Gordon Research Seminar on Flow and Transport in Permeable Media, 30.07.2016 - 31.07.2016, Girona, Spanien. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2016/Gordon_Hommel_2016.pdf
- Glaeser, D., Class, H., Kissinger, A., & Beck, M. (2016). Towards a parameterized model for risk assessment in shale gas exploration. In European Geosciences Union General Assembly (2016), 17.04.2016 - 22.04.2016, Vienna, Austria. https://www.egu2016.eu/
- Hommel, J., Ebigbo, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2016). Finding a balance between accuracy and computational effort for modeling biomineralization. In EGU General Assembly 2016, 18.04.2016 - 22.04.2016, Vienna, Austria. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2016/EGU_Hommel_2016.pdf
- Hommel, J., Ebigbo, A., Gerlach, R., Cunningham, A. B., Helmig, R., & Class, H. (2015). Finding a balance between accuracy and effort for modeling biomineralization. In NUPUS annual meeting 2015 , 08.09.2015 - 12.09.2015, Freudenstadt. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/NUPUS_Hommel_2015.pdf
- Beck, M., Seitz, G., Class, H., & Helmig, R. (2015). A new phenomenological approach to modelling of shear failure in porous media. In NUPUS annual meeting 2015 , 08.09.2015 - 12.09.2015, Freudenstadt. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/NupusPoster_Beck_2015.pdf
- Hommel, J., Lauchnor, E., Phillips, A., Gerlach, R., Cunningham, A. B., Helmig, R., Ebigbo, A., & Class, H. (2015). A revised model for microbially induced calcite precipitation - improvements and insights. In 7th International Conference on Porous Media & Annual Meeting - InterPore 2015, 18.05.2015 - 21.05.2015, Padua, Italy. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/InterPore_Hommel_2015.pdf
- Beck, M., Darcis, M., Class, H., & Helmig, R. (2014). Spatial model coupling - an efficient scheme to combine hydraulic and geomechanic simulations. In Gordon Research Conference on Flow and Transport in Permeable Media 2014, 06.07.2014 - 11.07.2014, Lewiston, Maine, USA. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2014/GordonPosterBeck.pdf
- Hommel, J., Lauchnor, E., Cunningham, A. B., Helmig, R., Ebigbo, A., & Class, H. (2014). Improvements in Modeling Microbially Induced Calcite Precipitation as a Leakage Mitigation Technology. In Gordon Research Seminar on Flow and Transport in Permeable Media 2014, 05.07.2014 - 06.07.2014, Lewiston, Maine, USA. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2015/Gordon_Hommel_2014.pdf
- Hommel, J., Lauchnor, E., Cunningham, A. B., Helmig, R., Ebigbo, A., & Class, H. (2014). Improvements in Modeling Microbially Induced Calcite Precipitation as a Leakage Mitigation Technology. In Gordon Research Conference on Flow and Transport in Permeable Media 2014, 06.07.2014 - 11.07.2014, Lewiston, Maine, USA. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2014/Gordon_Hommel_2014.pdf
- Hommel, J., Lauchnor, E., Cunningham, A. B., Helmig, R., Ebigbo, A., & Class, H. (2014). Estimation of uncertain parameters to improve modeling of Microbially Induced Calcite Precipitation. In European Geoscience Union General Assembly 2014, 28.04.2014 - 02.05.2014, Vienna, Austria. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2014/EGU_Hommel_2014.pdf
- Hommel, J., Cunningham, A. B., Helmig, R., Ebigbo, A., & Class, H. (2014). Estimation of uncertain parameters of the biomineralization model by inverse modeling. In NUPUS annual meeting 2014, 16.03.2014 - 19.03.2014, Freudenstadt. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2014/Nupus-Meeting_Hommel_2014.pdf
- Kleinknecht, S., Braun, J., & Class, H. (2014). Migration and Retention of a Heavy NAPL Vapor in the Unsaturated Zone. In 8th NUPUS Meeting. http://www.iws.uni-stuttgart.de/publikationen/vegas/NUPUSConferenceKleinknecht.pdf
- Class, H., Flemisch, B., Helmig, R., Baber, K., Faigle, B., Grüninger, C., Kissinger, A., Schmid, K. S., Schneider, M., Schröder, N., Schwenck, N., & Walter, L. (2014). Dumux: Dune for Multi-Phase, Component, Scale, Physics, ... Flow and Transport in Porous Media. In NumPor Annual Meeting 2014, 02.03.2014 - 03.03.2014, KAUST, Kingdom of Saudi Arabia.
- Hommel, J., Cunningham, A. B., Ebigbo, A., Helmig, R., & Class, H. (2013). Numerical investigation of microbially induced calcite precipitation as leakage mitigation technology. In NUPUS-Conference, 30.09.2013 - 02.10.2013, Bergen, Norway. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2013/NUPUS-Conference_Hommel_2013.pdf
- Oladyshkin, S., Schröder, P., Class, H., & Nowak, W. (2013). Chaos Expansion Based Bootstrap Filter To Calibrate CO2 Injection. In EGU General Assembly, 07.04.2013 - 11.04.2013, Vienna, Austria: Vol. Vol.15.
- Hommel, J., Cunningham, A. B., Helmig, R., Ebigbo, A., & Class, H. (2013). Numerical investigation of microbially induced calcite precipitation as leakage mitigation technology. In NUPUS annual Meeting 17-20 March 2013, 17.03.2013 - 20.03.2013, Freudenstadt. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2013/Nupus-Meeting_Hommel_2013.pdf
- Oladyshkin, S., Class, H., Helmig, R., & Nowak, W. (2011). Efficient Bayesian updating with particle filters based on polynomial chaos expansion for CO2 storage. In AGU Fall Meeting 2011, 05.12.2011 - 09.12.2011, San Francisco, USA.
- Walter, L., Class, H., Oladyshkin, S., Flemisch, B., & Helmig, R. (2011). Influence of Dirichlet boundary conditions on risk assessment for CO2 storage in geological formations. In SimTech 2011 - International Conference on Simulation Technology 2011, 14.06.2011 - 17.06.2011, Stuttgart.
- Oladyshkin, S., Class, H., Helmig, R., & Nowak, W. (2011). Modeling of underground carbon dioxide storage: data-driven robust design and probabilistic risk assessment. In SimTech 2011 - International Conference on Simulation Technology 2011, 14.06.2011 - 17.06.2011, Stuttgart.
- Walter, L., Oladyshkin, S., Class, H., Darcis, M., & Helmig, R. (2010). A study on pressure evolution in a sand channel system during CO2 injection. In Greenhouse Gas Control Technologies (GHGT10), 19.09.2010 - 23.09.2010, Amsterdam, The Netherlands.
- Mosthaf, K., Class, H., Flemisch, B., Helmig, R., Leijnse, T., & Rybak, I. (2009). Multi-component modeling of porous-media flow coupled with free flow. In European Geosciences Union (EGU) - General Assembly, 20.04.2009 - 24.04.2009, Wien, Österreich.
- Darcis, M., Class, H., & Flemisch, B. (2008). Coupling Models of Different Complexity for the Simulation of CO2 Storage in Saline Aquifers. In 9th International Conference on Greenhouse Gas Control Technologies (GHGT9), 16.11.2008 - 20.11.2008, Washington DC, USA.
- Winkler, A., Class, H., & Helmig, R. (2002). An Efficient Solution Technique for the Numerical Simulation of Thermally Enhanced Soil Vapour Extraction. In International Groundwater Symposium: “Bridging the Gap between Measurement and Modeling in Heterogeneous Media”, 25.03.2002 - 28.03.2002, Berkeley, USA.
Supervised student assignements
- Coupling between a detailed model and a large-scale model for exchanging density-dependent salt fluxes. (2022). (Masterarbeit). Universität Stuttgart, Institut für Wasser-und Umweltsystemmodellierung, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung.
- Modeling calcite dissolution due to density-induced fingering of CO2-enriched water. (2021). (Master’s Thesis).
- Density-driven dissolution of CO2 in karst water - longterm monitoring and modelling in a water column. (2021). (Masterarbeit). Universität Stuttgart, Institut für Wasser-und Umweltsystemmodellierung, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung.
- A 0-dimensional conceptual model to facilitate coupling of groundwater and surface-water numerical models - and its application to a bog-wetland study area. (2021). (Masterarbeit). Universität Stuttgart, Institut für Wasser-und Umweltsystemmodellierung, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung.
- Grundlagenuntersuchung zum saugseitigen Filter im DNOX-Fördermodul. (2020). (Masterarbeit). Universität Stuttgart, Institut für Wasser-und Umweltsystemmodellierung, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung.
- Kalibrierung eines realistischen Grundwassermodells mit FEPEST. (2020). (Masterarbeit). Universität Stuttgart, Institut für Wasser-und Umweltsystemmodellierung, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung.
- Experimentelle Visualisierung von Konvektion durch in Wasser gelöstes CO2. (2018). Universität Stuttgart.
- Steam Assisted Gravity Drainage - Comparison of continuous and cyclic injection on field and laboratory scale. (2015). (Diplomarbeit). Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung.
- Effects of pH Control Techniques on Transport of Zero-Valent Iron Nanoparticles in an Aquifer. (2012). (Master’s Thesis).
- Steam Injection Technique for In Situ Remediation of Chlorinated Hydrocarbons from Low Permeable Saturated Zones - Experiment and Numerical Approach. (2011). (Diplomarbeit). Universität Stuttgart, Institut für Wasserbau.
- Vereinfachte Methoden zur Flutwellenabschätzung. (2011). (Bachelorarbeit). Universität Stuttgart, Institut für Wasserbau.
- Numerical Investigations of Flow through Fractured Porous Media. (2007). (Masterthesis).
- Erarbeitung und Implementierung eines Modellkonzepts zur Simulation von Strömungs- und Transportprozessen im menschlichen Gehirn. (2007). (Diplomarbeit). Universität Stuttgart, Institut für Wasserbau.
- Entwicklung und Implementierung eines numerischen Modellkonzepts zur Simulation von Alkoholspülungsprozessen in DNAPL-kontaminierten Grundwasserleitern. (2005). (Diplomarbeit). Stuttgart, Institut für Wasserbau.
- Numerical Modeling of Methane Adsorption and Transport Processes in Mined Areas. (2005). (Masterthesis).
- Numerische Modellierung von Strömungs- und Transportvorgängen für Mehrphasen-Mehrkomponenten-Systeme in geklüftet porösen Medien. (2001). (Diplomarbeit). Technische Universität Braunschweig, Institut für ComputerAnwendungen im Bauingenieurwesen.
- Skalenbetrachtungen zur Modellierung von Salzwasserintrusionsprozessen. (2000). (Studienarbeit). Technische Universität Braunschweig, Institut für ComputerAnwendungen im Bauingenieurwesen.
- Unterschiedliche Raumdiskretisierungsansätze zur numerischen Modellierung nichtisothermer Dreiphasen-Dreikomponentenströmungen in porösen Medien. (1999). (Diplomarbeit). Technische Universität Braunschweig, Institut für ComputerAnwendungen im Bauingenieurwesen.
Current research projects
-
EXC 2075, PN 1-5: Numerical simulations and process analysis of CO2 enrichment in the vadose zone and at the gas-water interface of karstic systems
Duration: 09/2024 - 12/2025
Department: LH2
Leader: Holger Class
Funding: DFG -
DIETER: Digitization of mining structures using innovative sensor technology and artificial intelligence
Duration: 01/2024 - 12/2026
Department: LH2
Leader: Martin Schneider, Holger Class, Bernd Flemisch
Funding: BMBF -
GAS-REACT: GAS interchange and REACTive processes in coupled subsurface/atmosphere systems (HE 9610))
Duration: 01/2024 - 12/2026
Department: LH2
Leader: Holger Class
Funding: DFG -
Transportberechnungen für die spezifische Freigabe
Duration: 07/2023 - 05/2025
Department: LH2
Leader: Holger Class, Bernd Flemisch
Funding: GRS -
Experimental and numerical investigations on density-driven dissolution of CO2 and related carbonate dissolution in karst water
Duration: 11/2022 - 10/2025
Department: LH2
Leader: Holger Class
Funding: DFG -
TrinkXtrem: Adaptation strategies of public drinking water supply to extreme events
Duration: 02/2022 - 01/2025
Department: LH2
Leader: Rainer Helmig, Holger Class
Funding: BMBF -
EXC 2075: Coupled flow, transport, and geochemical processes in fractures/fissures with a focus on geothermal and karstic systems
Duration: 10/2021 - 12/2024
Department: LH2
Leader: Rainer Helmig, Holger Class, Bernd Flemisch
Funding: DFG -
RADIOMOD: Modelling of hydrodynamics and mass transport for water-bound transport processes
Duration: 09/2019 - 03/2023
Department: LH2
Leaders: Bernd Flemisch, Holger Class
Funding: BfS -
SFB 1313, C04: Pore-scale and REV-scale approaches to biological and chemical pore-space alteration in porous media
Duration: 01/2018 - 12/2025
Department: LH2
Leader: Holger Class
Funding: DFG -
AK-NERO: Working Group Nerochytic Speleogenesis
Department: LH2
Leader: Holger Class