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Institut
Team
Helmig, Rainer

Rainer Helmig

Herr Prof. Dr.-Ing. Dr.-Ing. h.c.

Professor Emeritus
Institut für Wasser- und Umweltsystemmodellierung
Lehrstuhl für Hydromechanik und Hydrosystemmodellierung

Kontakt

+49 711 685 64741
+49 711 685 60430
E-Mail
Visitenkarte (VCF)

Pfaffenwaldring 61
70569 Stuttgart
Deutschland
Raum: 1.006

Lehre

Multiphase Modelling in Porous Media (Vorlesung mit Übung)
Fluidmechanik II (Vorlesung mit Übung)
Numerische Methoden der Fluidmechanik (Vorlesung mit Übung)
Ringvorlesung Simulationstechnologien (Vorlesung)
Einführung in die Modellierung (Vorlesung)
Simulationstechnik A (Vorlesung mit Übung)

Betreute Arbeiten

Habilitationen
Promotionen (Hauptberichter)
Promotionen (Mitberichter)

Seit 2024: Emeritus, Institut für Wasser- und Umweltsystemmodellierung, Universität Stuttgart
2000-2024: Professor (C4), Institut für Wasser- und Umweltsystemmodellierung, Universität Stuttgart
1998-2000: 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

Preise und Auszeichnungen

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
2015: NGWA Henry Darcy Distinguished Lecturer
seit 2017: Gewähltes Mitglied der Deutschen Akademie der Technikwissenschaften (acatech)
2019: InerPore Honorary Lifetime Membership Award
2019 – 2022: Magne Espedal Adjunct Professor, Universität Bergen
2020: AGU Fellow, American Geophysical Union
2021 – 2024: Forschungsprofessur, Universität Stuttgart
2022: Ehrendoktorwürde der Heriot-Watt University, UK
2022: Gewähltes Mitglied der Academia Europaea, The Academy of Europe
2024: Kimberly-Clark Distinguished Lecturer 2025, International Society for Porous Media

Aktuelle interne und externe Tätigkeiten (Auswahl)

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
2018-2021: Mitglied des Direktoriums im Exzellenzcluster EXC 2075 “Daten-integrierte Simulationswissenschaft” (Simtech) an der Universität Stuttgart
2018-2023: Sprecher des Sonderforschungsbereiches SFB 1313 “Interface-driven multi-field processes in porous media – flow, transport and deformation” (DFG)
seit 2018: Principal Investigator im Exzellenzcluster EXC 2075 “Daten-integrierte Simulationswissenschaft” (Simtech) an der Universität Stuttgart
seit 2018: Principal investigator des Sonderforschungsbereiches SFB 1313 “Interface-driven multi-field processes in porous media – flow, transport and deformation” (DFG)

Publikationen

(Zeitschriften-) Aufsätze
1. Veyskarami, M., Michalkowski, C., Bringedal, C., & Helmig, R. (2023). Droplet Formation, Growth and Detachment at the Interface of a Coupled Free-FLow--Porous Medium System: A New Model Development and Comparison. Transport in Porous Media, 149, 389–419. https://doi.org/10.1007/s11242-023-01944-2
  - BibTeX
  - Link
  BibTeX
  @article{veyskarami2023droplet, author = {Veyskarami, Maziar and Michalkowski, Cynthia and Bringedal, Carina and Helmig, Rainer}, doi = {10.1007/s11242-023-01944-2}, journal = {Transport in Porous Media}, month = {05}, pages = {389–419}, publisher = {Springer}, title = {Droplet Formation, Growth and Detachment at the Interface of a Coupled Free-FLow--Porous Medium System: A New Model Development and Comparison}, url = {https://link.springer.com/article/10.1007/s11242-023-01944-2}, volume = 149, year = 2023 }
  Link
  https://link.springer.com/article/10.1007/s11242-023-01944-2
2. Wu, H., Veyskarami, M., Schneider, M., & Helmig, R. (2023). A New Fully Implicit Two-Phase Pore-Network Model by Utilizing Regularization Strategies. Transport in Porous Media. https://doi.org/10.1007/s11242-023-02031-2
  Zusammenfassung
  In this paper, we address the expensive computational cost resulting from limited time-step sizes during numerical simulations of two-phase flow in porous media using dynamic pore-network models. To overcome this issue, we propose a numerical method for dynamic pore-network models using a fully implicit approach. The proposed method introduces a regularization strategy considering the historical fluid configuration at the pore throat, which smooths the discontinuities in local conductivity caused by invasion and snap-off events. The results demonstrate the superiority of the proposed method in terms of accuracy, efficiency and consistency in comparison with other numerical schemes. With similar computational cost, determined by time-step sizes and number of Newton iterations, the developed method in this work yields more accurate results compared to similar schemes presented in the literature. Additionally, our results highlight the enhanced robustness of the our scheme, as it exhibits reduced sensitivity to variations in time-step sizes.
  BibTeX
  @article{wu_new_2023, abstract = {In this paper, we address the expensive computational cost resulting from limited time-step sizes during numerical simulations of two-phase flow in porous media using dynamic pore-network models. To overcome this issue, we propose a numerical method for dynamic pore-network models using a fully implicit approach. The proposed method introduces a regularization strategy considering the historical fluid configuration at the pore throat, which smooths the discontinuities in local conductivity caused by invasion and snap-off events. The results demonstrate the superiority of the proposed method in terms of accuracy, efficiency and consistency in comparison with other numerical schemes. With similar computational cost, determined by time-step sizes and number of Newton iterations, the developed method in this work yields more accurate results compared to similar schemes presented in the literature. Additionally, our results highlight the enhanced robustness of the our scheme, as it exhibits reduced sensitivity to variations in time-step sizes.}, author = {Wu, Hanchuan and Veyskarami, Maziar and Schneider, Martin and Helmig, Rainer}, doi = {10.1007/s11242-023-02031-2}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {10}, title = {A New Fully Implicit Two-Phase Pore-Network Model by Utilizing Regularization Strategies}, url = {https://doi.org/10.1007/s11242-023-02031-2}, year = 2023 }
  Link
  https://doi.org/10.1007/s11242-023-02031-2
3. Ackermann, S., Fest-Santini, S., Veyskarami, M., Helmig, R., & Santini, M. (2023). Experimental validation of a coupling concept for drop formation and growth onto porous materials by high-resolution X-ray imaging technique. International Journal of Multiphase Flow, 160. https://doi.org/10.1016/j.ijmultiphaseflow.2022.104371
  Zusammenfassung
  Droplets formed on the hydrophobic surface of a porous medium exposed to a cross-flowing gas stream have a strong influence on the mass, momentum, and energy exchange across the porous interface, being of importance in several physical systems and engineering applications, like fuel cells. However, the fluid displacement front is highly complex at the pore-scale, since it is characterized by the surface wettability and a contact angle variation along the triple line. Furthermore, the droplet formation is affected by the pore geometry and the surface wettability. These result in a challenging multi-phase scenario with controversial literature, and few studies consider the detailed mechanism of droplet formation on the surface of the porous medium. In this work, two multi-scale simulations for the emerging water droplet from a single hydrophobic capillary pore opening into the gas phase are validated by a benchmark experiment with the help of a high-resolution X-ray imaging technique to characterize the droplet growing. A three-domain approach (gaseous free flow, interface and porous medium, FIP) was compared with a two-domain approach (based on a free-flow and the porous medium, FP). Whereas the three-domain approach introduces two sets of coupling conditions, one for the free flow-interface and one for the interface-porous medium, the two-domain approach introduces only one set of coupling connections for describing the interaction between the domains. In both approaches, droplet formation and growth alter the coupling conditions between the domains. While the FIP approach treats the porous medium as a continuous matter, it is resolved discretely with the help of a pore network in the FP approach. Both approaches show good agreements with the experimental observations and high correspondences for the drop volume, radii and contact angle evolution. The proposed models provide a base for future developments and help to gain a better insight about the impact of the droplet formation on the interface in a coupled free flow-porous medium system.
  BibTeX
  @article{paper-2023-ackermann-experimentalvalidation, abstract = {Droplets formed on the hydrophobic surface of a porous medium exposed to a cross-flowing gas stream have a strong influence on the mass, momentum, and energy exchange across the porous interface, being of importance in several physical systems and engineering applications, like fuel cells. However, the fluid displacement front is highly complex at the pore-scale, since it is characterized by the surface wettability and a contact angle variation along the triple line. Furthermore, the droplet formation is affected by the pore geometry and the surface wettability. These result in a challenging multi-phase scenario with controversial literature, and few studies consider the detailed mechanism of droplet formation on the surface of the porous medium. In this work, two multi-scale simulations for the emerging water droplet from a single hydrophobic capillary pore opening into the gas phase are validated by a benchmark experiment with the help of a high-resolution X-ray imaging technique to characterize the droplet growing. A three-domain approach (gaseous free flow, interface and porous medium, FIP) was compared with a two-domain approach (based on a free-flow and the porous medium, FP). Whereas the three-domain approach introduces two sets of coupling conditions, one for the free flow-interface and one for the interface-porous medium, the two-domain approach introduces only one set of coupling connections for describing the interaction between the domains. In both approaches, droplet formation and growth alter the coupling conditions between the domains. While the FIP approach treats the porous medium as a continuous matter, it is resolved discretely with the help of a pore network in the FP approach. Both approaches show good agreements with the experimental observations and high correspondences for the drop volume, radii and contact angle evolution. The proposed models provide a base for future developments and help to gain a better insight about the impact of the droplet formation on the interface in a coupled free flow-porous medium system.}, author = {Ackermann, Sina and Fest-Santini, Stephanie and Veyskarami, Maziar and Helmig, Rainer and Santini, Maurizio}, doi = {https://doi.org/10.1016/j.ijmultiphaseflow.2022.104371}, journal = {International Journal of Multiphase Flow}, month = {01}, page = {104371}, title = {Experimental validation of a coupling concept for drop formation and growth onto porous materials by high-resolution X-ray imaging technique}, url = {https://www.sciencedirect.com/science/article/pii/S0301932222003305}, volume = 160, year = 2023 }
  Link
  https://www.sciencedirect.com/science/article/pii/S0301932222003305
4. Boon, W. M., Gläser, D., Helmig, R., & Yotov, I. (2023). Flux-mortar mixed finite element methods with multipoint flux approximation. Computer Methods in Applied Mechanics and Engineering, 405, 115870. https://doi.org/10.1016/j.cma.2022.115870
  Zusammenfassung
  The flux-mortar mixed finite element method was recently developed in Boon et al. (2022) for a general class of domain decomposition saddle point problems on non-matching grids. In this work we develop the method for Darcy flow using the multipoint flux approximation as the subdomain discretization. The subdomain problems involve solving positive definite cell-centered pressure systems. The normal flux on the subdomain interfaces is the mortar coupling variable, which plays the role of a Lagrange multiplier to impose weakly continuity of pressure. We present well-posedness and error analysis based on reformulating the method as a mixed finite element method with a quadrature rule. We develop a non-overlapping domain decomposition algorithm for the solution of the resulting algebraic system that reduces it to an interface problem for the flux-mortar, as well as an efficient interface preconditioner. A series of numerical experiments is presented illustrating the performance of the method on general grids, including applications to flow in complex porous media.
  BibTeX
  @article{paper-2023-boon-flux-mortar, abstract = {The flux-mortar mixed finite element method was recently developed in Boon et al. (2022) for a general class of domain decomposition saddle point problems on non-matching grids. In this work we develop the method for Darcy flow using the multipoint flux approximation as the subdomain discretization. The subdomain problems involve solving positive definite cell-centered pressure systems. The normal flux on the subdomain interfaces is the mortar coupling variable, which plays the role of a Lagrange multiplier to impose weakly continuity of pressure. We present well-posedness and error analysis based on reformulating the method as a mixed finite element method with a quadrature rule. We develop a non-overlapping domain decomposition algorithm for the solution of the resulting algebraic system that reduces it to an interface problem for the flux-mortar, as well as an efficient interface preconditioner. A series of numerical experiments is presented illustrating the performance of the method on general grids, including applications to flow in complex porous media.}, author = {Boon, Wietse M. and Gläser, Dennis and Helmig, Rainer and Yotov, Ivan}, doi = {10.1016/j.cma.2022.115870}, issn = {0045-7825}, journal = {Computer Methods in Applied Mechanics and Engineering}, pages = 115870, title = {Flux-mortar mixed finite element methods with multipoint flux approximation}, url = {https://www.sciencedirect.com/science/article/pii/S004578252200826X}, volume = 405, year = 2023 }
  Link
  https://www.sciencedirect.com/science/article/pii/S004578252200826X
5. Bringedal, C., Schollenberger, T., Pieters, G. J. M., van Duijn, C. J., & Helmig, R. (2022). Evaporation-Driven Density Instabilities in Saturated Porous Media. Transport in Porous Media, 143(2), Article 2. https://doi.org/10.1007/s11242-022-01772-w
  Zusammenfassung
  Soil salinization is a major cause of soil degradation and hampers plant growth. For soils saturated with saline water, the evaporation of water induces accumulation of salt near the top of the soil. The remaining liquid gets an increasingly larger density due to the accumulation of salt, giving a gravitationally unstable situation, where instabilities in the form of fingers can form. These fingers can, hence, lead to a net downward transport of salt. We here investigate the appearance of these fingers through a linear stability analysis and through numerical simulations. The linear stability analysis gives criteria for onset of instabilities for a large range of parameters. Simulations using a set of parameters give information also about the development of the fingers after onset. With this knowledge, we can predict whether and when the instabilities occur, and their effect on the salt concentration development near the top boundary.
  BibTeX
  @article{bringedal_evaporation-driven_2022, abstract = {Soil salinization is a major cause of soil degradation and hampers plant growth. For soils saturated with saline water, the evaporation of water induces accumulation of salt near the top of the soil. The remaining liquid gets an increasingly larger density due to the accumulation of salt, giving a gravitationally unstable situation, where instabilities in the form of fingers can form. These fingers can, hence, lead to a net downward transport of salt. We here investigate the appearance of these fingers through a linear stability analysis and through numerical simulations. The linear stability analysis gives criteria for onset of instabilities for a large range of parameters. Simulations using a set of parameters give information also about the development of the fingers after onset. With this knowledge, we can predict whether and when the instabilities occur, and their effect on the salt concentration development near the top boundary.}, author = {Bringedal, Carina and Schollenberger, Theresa and Pieters, G. J. M. and van Duijn, C. J. and Helmig, Rainer}, doi = {10.1007/s11242-022-01772-w}, issn = {1573-1634}, journal = {Transport in Porous Media}, language = {en}, month = {06}, number = 2, pages = {297--341}, title = {Evaporation-{Driven} {Density} {Instabilities} in {Saturated} {Porous} {Media}}, url = {https://doi.org/10.1007/s11242-022-01772-w}, urldate = {2022-07-08}, volume = 143, year = 2022 }
  Link
  https://doi.org/10.1007/s11242-022-01772-w
6. Michalkowski, C., Weishaupt, K., Schleper, V., & Helmig, R. (2022). Modeling of Two Phase Flow in a Hydrophobic Porous Medium Interacting with a Hydrophilic Structure. Transport in Porous Media, 144(2), Article 2. https://doi.org/10.1007/s11242-022-01816-1
  Zusammenfassung
  Fluid flow through layered materials with different wetting behavior is observed in a wide range of applications in biological, environmental and technical systems. Therefore, it is necessary to understand the occuring transport mechanisms of the fluids at the interface between the layered constituents. Of special interest is the water transport in polymer electrolyte membrane fuel cells. Here, it is necessary to understand the transport mechanisms of water throughout the cell constituents especially on the cathode side, where the excess water has to be removed. This is crucial to choose optimal operating conditions and improve the overall cell performance. Pore-scale modeling of gas diffusion layers (GDLs) and gas distributor has been established as a favorable technique to investigate the ongoing processes. Investigating the interface between the hydrophobic porous GDL and the hydrophilic gas distributor, a particular challenge is the combination and interaction of the different material structures and wetting properties at the interface and its influence on the flow. In this paper, a modeling approach is presented which captures the influence of a hydrophilic domain on the flow in a hydrophobic porous domain at the interface between the two domains. A pore-network model is used as the basis of the developed concept which is extended to allow the modeling of mixed-wet interactions at the interface. The functionality of the model is demonstrated using basic example configurations with one and several interface pores and it is applied to a realistic GDL representation in contact with a channel-land structured gas distributor.
  BibTeX
  @article{michalkowski_modeling_2022, abstract = {Fluid flow through layered materials with different wetting behavior is observed in a wide range of applications in biological, environmental and technical systems. Therefore, it is necessary to understand the occuring transport mechanisms of the fluids at the interface between the layered constituents. Of special interest is the water transport in polymer electrolyte membrane fuel cells. Here, it is necessary to understand the transport mechanisms of water throughout the cell constituents especially on the cathode side, where the excess water has to be removed. This is crucial to choose optimal operating conditions and improve the overall cell performance. Pore-scale modeling of gas diffusion layers (GDLs) and gas distributor has been established as a favorable technique to investigate the ongoing processes. Investigating the interface between the hydrophobic porous GDL and the hydrophilic gas distributor, a particular challenge is the combination and interaction of the different material structures and wetting properties at the interface and its influence on the flow. In this paper, a modeling approach is presented which captures the influence of a hydrophilic domain on the flow in a hydrophobic porous domain at the interface between the two domains. A pore-network model is used as the basis of the developed concept which is extended to allow the modeling of mixed-wet interactions at the interface. The functionality of the model is demonstrated using basic example configurations with one and several interface pores and it is applied to a realistic GDL representation in contact with a channel-land structured gas distributor.}, author = {Michalkowski, Cynthia and Weishaupt, Kilian and Schleper, Veronika and Helmig, Rainer}, doi = {10.1007/s11242-022-01816-1}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {09}, number = 2, pages = {481--506}, title = {Modeling of Two Phase Flow in a Hydrophobic Porous Medium Interacting with a Hydrophilic Structure}, url = {https://doi.org/10.1007/s11242-022-01816-1}, volume = 144, year = 2022 }
  Link
  https://doi.org/10.1007/s11242-022-01816-1
7. Boon, W. M., Gläser, D., Helmig, R., & Yotov, I. (2022). Flux-Mortar Mixed Finite Element Methods on NonMatching Grids. SIAM Journal on Numerical Analysis, 60(3), Article 3. https://doi.org/10.1137/20M1361407
  Zusammenfassung
  We investigate a mortar technique for mixed finite element approximations of a class of domain decomposition saddle point problems on nonmatching grids in which the variable associated with the essential boundary condition, referred to as flux, is chosen as the coupling variable. It plays the role of a Lagrange multiplier to impose weakly continuity of the variable associated with the natural boundary condition. The flux-mortar variable is incorporated with the use of a discrete extension operator. We present well-posedness and error analysis in an abstract setting under a set of suitable assumptions, followed by a nonoverlapping domain decomposition algorithm that reduces the global problem to a positive definite interface problem. The abstract theory is illustrated for Darcy flow, where the normal flux is the mortar variable used to impose continuity of pressure, and for Stokes flow, where the velocity vector is the mortar variable used to impose continuity of normal stress. In both examples, suitable discrete extension operators are developed and the assumptions from the abstract theory are verified. Numerical studies illustrating the theoretical results are presented for Darcy flow.
  BibTeX
  @article{doi:10.1137/20M1361407, abstract = { We investigate a mortar technique for mixed finite element approximations of a class of domain decomposition saddle point problems on nonmatching grids in which the variable associated with the essential boundary condition, referred to as flux, is chosen as the coupling variable. It plays the role of a Lagrange multiplier to impose weakly continuity of the variable associated with the natural boundary condition. The flux-mortar variable is incorporated with the use of a discrete extension operator. We present well-posedness and error analysis in an abstract setting under a set of suitable assumptions, followed by a nonoverlapping domain decomposition algorithm that reduces the global problem to a positive definite interface problem. The abstract theory is illustrated for Darcy flow, where the normal flux is the mortar variable used to impose continuity of pressure, and for Stokes flow, where the velocity vector is the mortar variable used to impose continuity of normal stress. In both examples, suitable discrete extension operators are developed and the assumptions from the abstract theory are verified. Numerical studies illustrating the theoretical results are presented for Darcy flow. }, author = {Boon, Wietse M. and Gläser, Dennis and Helmig, Rainer and Yotov, Ivan}, doi = {10.1137/20M1361407}, eprint = {https://doi.org/10.1137/20M1361407}, journal = {SIAM Journal on Numerical Analysis}, month = {05}, number = 3, pages = {1193-1225}, title = {Flux-Mortar Mixed Finite Element Methods on NonMatching Grids}, url = {https://doi.org/10.1137/20M1361407}, volume = 60, year = 2022 }
  Link
  https://doi.org/10.1137/20M1361407
8. Younes, A., Hoteit, H., Helmig, R., & Fahs, M. (2022). A robust upwind mixed hybrid finite element method for transport in variably saturated porous media. Hydrology and Earth System Sciences, 26(20), Article 20. https://doi.org/10.5194/hess-26-5227-2022
  - BibTeX
  - Link
  BibTeX
  @article{Younes2022, author = {Younes, Anis and Hoteit, Hussein and Helmig, Rainer and Fahs, Marwan}, doi = {10.5194/hess-26-5227-2022}, issn = {1607-7938}, journal = {Hydrology and Earth System Sciences}, month = {10}, number = 20, pages = {5227–5239}, publisher = {Copernicus GmbH}, title = {A robust upwind mixed hybrid finite element method for transport in variably saturated porous media}, url = {http://dx.doi.org/10.5194/hess-26-5227-2022}, volume = 26, year = 2022 }
  Link
  http://dx.doi.org/10.5194/hess-26-5227-2022
9. Tsinober, A., Rosenzweig, R., Class, H., Helmig, R., & Shavit, U. (2022). The Role of Mixed Convection and Hydrodynamic Dispersion During CO2 Dissolution in Saline Aquifers: A Numerical Study. Water Resources Research, 58(3), Article 3. https://doi.org/10.1029/2021WR030494
  Zusammenfassung
  Abstract Dissolution trapping plays a significant role in CO2 geological storage. When CO2 dissolves in aquifer brines, the aqueous solution is heavier than the underlying resident brine. This results in convective instability in the form of CO2-rich fingers, which accelerates dissolution. It was recently shown that background flow affects CO2 dissolution by suppressing the development of convective fingers. However, there was a discrepancy between computational results and measurements, with the computational results demonstrating a decrease in the dissolution rate and the laboratory measurements showing no significant effect. Here, we attempted to understand this difference by exploring the relations between the transport mechanisms that facilitate convective mixing. We investigated the role of background flow by using numerical simulations that were validated by laboratory measurements and analytical solutions. Simulations were generated for the same porous medium and fluid pair used in the experiments, keeping the Rayleigh number constant, while changing the background velocity and the Peclet number. Studying the flux components revealed three distinct regimes characterized by the Peclet to Rayleigh ratio Pe/Ra. When Pe/Ra < 0.77, natural convection dominated, and dissolution remained approximately constant. When the background flow was large (Pe/Ra > 2), dissolution was controlled by pure forced convection and increased with Pe/Ra. In the intermediate range (0.77 < Pe/Ra < 2), both natural convection and forced convection were important.
  BibTeX
  @article{https://doi.org/10.1029/2021WR030494, abstract = {Abstract Dissolution trapping plays a significant role in CO2 geological storage. When CO2 dissolves in aquifer brines, the aqueous solution is heavier than the underlying resident brine. This results in convective instability in the form of CO2-rich fingers, which accelerates dissolution. It was recently shown that background flow affects CO2 dissolution by suppressing the development of convective fingers. However, there was a discrepancy between computational results and measurements, with the computational results demonstrating a decrease in the dissolution rate and the laboratory measurements showing no significant effect. Here, we attempted to understand this difference by exploring the relations between the transport mechanisms that facilitate convective mixing. We investigated the role of background flow by using numerical simulations that were validated by laboratory measurements and analytical solutions. Simulations were generated for the same porous medium and fluid pair used in the experiments, keeping the Rayleigh number constant, while changing the background velocity and the Peclet number. Studying the flux components revealed three distinct regimes characterized by the Peclet to Rayleigh ratio Pe/Ra. When Pe/Ra < 0.77, natural convection dominated, and dissolution remained approximately constant. When the background flow was large (Pe/Ra > 2), dissolution was controlled by pure forced convection and increased with Pe/Ra. In the intermediate range (0.77 < Pe/Ra < 2), both natural convection and forced convection were important.}, author = {Tsinober, Avihai and Rosenzweig, Ravid and Class, Holger and Helmig, Rainer and Shavit, Uri}, doi = {https://doi.org/10.1029/2021WR030494}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2021WR030494}, journal = {Water Resources Research}, month = {03}, note = {e2021WR030494 2021WR030494}, number = 3, pages = {e2021WR030494}, title = {The Role of Mixed Convection and Hydrodynamic Dispersion During CO2 Dissolution in Saline Aquifers: A Numerical Study}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR030494}, volume = 58, year = 2022 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR030494
10. Wang, W., Lozano-Durán, A., Helmig, R., & Chu, X. (2022). Spatial and spectral characteristics of information flux between turbulent boundary layers and porous media. Journal of Fluid Mechanics, 949. https://doi.org/10.1017/jfm.2022.770
  - BibTeX
  - Link
  BibTeX
  @article{Wang2022, author = {Wang, Wenkang and Lozano-Durán, Adrián and Helmig, Rainer and Chu, Xu}, doi = {10.1017/jfm.2022.770}, issn = {1469-7645}, journal = {Journal of Fluid Mechanics}, month = {09}, publisher = {Cambridge University Press (CUP)}, title = {Spatial and spectral characteristics of information flux between turbulent boundary layers and porous media}, url = {http://dx.doi.org/10.1017/jfm.2022.770}, volume = 949, year = 2022 }
  Link
  http://dx.doi.org/10.1017/jfm.2022.770
11. Becker, B., Guo, B., Buntic, I., Flemisch, B., & Helmig, R. (2022). An Adaptive Hybrid Vertical Equilibrium/Full-Dimensional Model for Compositional Multiphase Flow. Water Resources Research, 58(1), Article 1. https://doi.org/10.1029/2021WR030990
  Zusammenfassung
  Abstract Efficient compositional models are required to simulate underground gas storage in porous formations where, for example, gas quality (such as purity) and loss of gas due to dissolution are of interest. We first extend the concept of vertical equilibrium (VE) to compositional flow, and derive a compositional VE model by vertical integration. Second, we present a hybrid model that couples the efficient compositional VE model to a compositional full-dimensional model. Subdomains, where the compositional VE model is valid, are identified during simulation based on a VE criterion that compares the vertical profiles of relative permeability at equilibrium to the ones simulated by the full-dimensional model. We demonstrate the applicability of the hybrid model by simulating hydrogen storage in a radially symmetric, heterogeneous porous aquifer. The hybrid model shows excellent adaptivity over space and time for different permeability values in the heterogeneous region, and compares well to the full-dimensional model while being computationally efficient, resulting in a runtime of roughly one-third of the full-dimensional model. Based on the results, we assume that for larger simulation scales, the efficiency of this new model will increase even more.
  BibTeX
  @article{https://doi.org/10.1029/2021WR030990, abstract = {Abstract Efficient compositional models are required to simulate underground gas storage in porous formations where, for example, gas quality (such as purity) and loss of gas due to dissolution are of interest. We first extend the concept of vertical equilibrium (VE) to compositional flow, and derive a compositional VE model by vertical integration. Second, we present a hybrid model that couples the efficient compositional VE model to a compositional full-dimensional model. Subdomains, where the compositional VE model is valid, are identified during simulation based on a VE criterion that compares the vertical profiles of relative permeability at equilibrium to the ones simulated by the full-dimensional model. We demonstrate the applicability of the hybrid model by simulating hydrogen storage in a radially symmetric, heterogeneous porous aquifer. The hybrid model shows excellent adaptivity over space and time for different permeability values in the heterogeneous region, and compares well to the full-dimensional model while being computationally efficient, resulting in a runtime of roughly one-third of the full-dimensional model. Based on the results, we assume that for larger simulation scales, the efficiency of this new model will increase even more.}, author = {Becker, Beatrix and Guo, Bo and Buntic, Ivan and Flemisch, Bernd and Helmig, Rainer}, doi = {https://doi.org/10.1029/2021WR030990}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2021WR030990}, journal = {Water Resources Research}, month = {01}, note = {e2021WR030990 2021WR030990}, number = 1, pages = {e2021WR030990}, title = {An Adaptive Hybrid Vertical Equilibrium/Full-Dimensional Model for Compositional Multiphase Flow}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR030990}, volume = 58, year = 2022 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR030990
12. Younes, A., Hoteit, H., Helmig, R., & Fahs, M. (2022). A robust fully mixed finite element model for flow and transport in unsaturated fractured porous media. Advances in Water Resources, 166, 104259. https://doi.org/10.1016/j.advwatres.2022.104259
  Zusammenfassung
  A fully mixed finite element (MFE) model is developed for nonlinear flow and transport in unsaturated fractured porous media with matrix-fracture and fracture-fracture fluid and mass exchanges. The model is based on the discrete fracture matrix (DFM) approach and assumes cross-flow equilibrium in the fractures. The MFE method is employed for the spatial discretization of both flow and transport on the 2D-matrix elements as well as on the 1D-fracture elements. An upwind scheme is employed to avoid unphysical oscillations in the case of advection dominant transport. The temporal discretization is performed using high-order time integration methods and efficient automatic time-stepping schemes via the MOL. Two test problems dealing with flow and mass transport in saturated and unsaturated fractured porous media are simulated to show the validity of the new model by comparison against (i) a 1D-2D Comsol finite element model and (ii) a 2D-2D Discontinuous Galerkin (DG) model where both fractures and matrix continua are discretized with small 2D mesh elements. The robustness and efficiency of the developed 1D-2D MFE model are then investigated for a challenging problem dealing with infiltration of contaminated water into an initially dry soil involving a fracture network. The new model yields stable results for advection-dominated and advection-dispersion transport configurations. Further, the results of the 1D-2D MFE model are in very good agreement with those of the 2D-2D DG model for both configurations. The simulation of infiltration of contaminated water into a dry fractured soil shows that the 1D-2D MFE model is within 15 times more efficient than the 2D-2D DG model, which confirms the high benefit of using robust and efficient DFM models for the simulation of flow and transport in fractured porous media.
  BibTeX
  @article{YOUNES2022104259, abstract = {A fully mixed finite element (MFE) model is developed for nonlinear flow and transport in unsaturated fractured porous media with matrix-fracture and fracture-fracture fluid and mass exchanges. The model is based on the discrete fracture matrix (DFM) approach and assumes cross-flow equilibrium in the fractures. The MFE method is employed for the spatial discretization of both flow and transport on the 2D-matrix elements as well as on the 1D-fracture elements. An upwind scheme is employed to avoid unphysical oscillations in the case of advection dominant transport. The temporal discretization is performed using high-order time integration methods and efficient automatic time-stepping schemes via the MOL. Two test problems dealing with flow and mass transport in saturated and unsaturated fractured porous media are simulated to show the validity of the new model by comparison against (i) a 1D-2D Comsol finite element model and (ii) a 2D-2D Discontinuous Galerkin (DG) model where both fractures and matrix continua are discretized with small 2D mesh elements. The robustness and efficiency of the developed 1D-2D MFE model are then investigated for a challenging problem dealing with infiltration of contaminated water into an initially dry soil involving a fracture network. The new model yields stable results for advection-dominated and advection-dispersion transport configurations. Further, the results of the 1D-2D MFE model are in very good agreement with those of the 2D-2D DG model for both configurations. The simulation of infiltration of contaminated water into a dry fractured soil shows that the 1D-2D MFE model is within 15 times more efficient than the 2D-2D DG model, which confirms the high benefit of using robust and efficient DFM models for the simulation of flow and transport in fractured porous media.}, author = {Younes, Anis and Hoteit, Hussein and Helmig, Rainer and Fahs, Marwan}, doi = {https://doi.org/10.1016/j.advwatres.2022.104259}, issn = {0309-1708}, journal = {Advances in Water Resources}, month = {08}, pages = 104259, title = {A robust fully mixed finite element model for flow and transport in unsaturated fractured porous media}, url = {https://www.sciencedirect.com/science/article/pii/S0309170822001294}, volume = 166, year = 2022 }
  Link
  https://www.sciencedirect.com/science/article/pii/S0309170822001294
13. Michalkowski, C., Veyskarami, M., Bringedal, C., Helmig, R., & Schleper, V. (2022). Two-phase Flow Dynamics at the Interface Between GDL and Gas Distributor Channel Using a Pore-Network Model. Transport in Porous Media, 144(2), Article 2. https://doi.org/10.1007/s11242-022-01813-4
  Zusammenfassung
  For improved operating conditions of a polymer electrolyte membrane (PEM) fuel cell, a sophisticated water management is crucial. Therefore, it is necessary to understand the transport mechanisms of water throughout the cell constituents especially on the cathode side, where the excess water has to be removed. Pore-scale modeling of diffusion layers and gas distributor has been established as a favorable technique to investigate the ongoing processes. Investigating the interface between the cathode layers, a particular challenge is the combination and interaction of the multi-phase flow in the porous material of the gas diffusion layer (GDL) with the free flow in the gas distributor channels. The formation, growth and detachment of water droplets on the hydrophobic, porous surface of the GDL have a major influence on the mass, momentum and energy exchange between the layers. A dynamic pore-network model is used to describe the flow through the porous GDL on the pore-scale. To capture the droplet occurrence and its influence on the flow, this dynamic two-phase pore-network model is extended to capture droplet formation and growth at the surface of the GDL as well as droplet detachment due to the gas flow in the gas distributor channels. In this article, the developed model is applied to single- and multi-tube systems to investigate the general drop behavior. These rather simple test-cases are compared to experimental and numerical data available in the literature. Finally, the model is applied to a GDL unit cell to analyze the interaction between two-phase flow through the GDL and drop formation at the interface between GDL and gas distributor channel.
  BibTeX
  @article{michalkowski_two-phase_2022, abstract = {For improved operating conditions of a polymer electrolyte membrane (PEM) fuel cell, a sophisticated water management is crucial. Therefore, it is necessary to understand the transport mechanisms of water throughout the cell constituents especially on the cathode side, where the excess water has to be removed. Pore-scale modeling of diffusion layers and gas distributor has been established as a favorable technique to investigate the ongoing processes. Investigating the interface between the cathode layers, a particular challenge is the combination and interaction of the multi-phase flow in the porous material of the gas diffusion layer (GDL) with the free flow in the gas distributor channels. The formation, growth and detachment of water droplets on the hydrophobic, porous surface of the GDL have a major influence on the mass, momentum and energy exchange between the layers. A dynamic pore-network model is used to describe the flow through the porous GDL on the pore-scale. To capture the droplet occurrence and its influence on the flow, this dynamic two-phase pore-network model is extended to capture droplet formation and growth at the surface of the GDL as well as droplet detachment due to the gas flow in the gas distributor channels. In this article, the developed model is applied to single- and multi-tube systems to investigate the general drop behavior. These rather simple test-cases are compared to experimental and numerical data available in the literature. Finally, the model is applied to a GDL unit cell to analyze the interaction between two-phase flow through the GDL and drop formation at the interface between GDL and gas distributor channel.}, author = {Michalkowski, Cynthia and Veyskarami, Maziar and Bringedal, Carina and Helmig, Rainer and Schleper, Veronika}, doi = {10.1007/s11242-022-01813-4}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {09}, number = 2, pages = {429--458}, title = {Two-phase Flow Dynamics at the Interface Between GDL and Gas Distributor Channel Using a Pore-Network Model}, url = {https://doi.org/10.1007/s11242-022-01813-4}, volume = 144, year = 2022 }
  Link
  https://doi.org/10.1007/s11242-022-01813-4
14. Eller, J., Sauerborn, T., Becker, B., Buntic, I., Gross, J., & Helmig, R. (2022). Modeling Subsurface Hydrogen Storage With Transport Properties From Entropy Scaling Using the PC-SAFT Equation of State. Water Resources Research, 58(4), Article 4. https://doi.org/10.1029/2021WR030885
  Zusammenfassung
  Abstract Hydrogen is a promising alternative to carbon based energy carriers and may be stored in large quantities in subsurface storage deposits. This work assesses the impact of static (density and phase equilibria) and dynamic (viscosity and diffusion coefficients) properties on the pressure field during the injection and extraction of hydrogen in the porous subsurface. In a first step, we derive transport properties for water, hydrogen and their mixture using the Perturbed-Chain Statistical Associating Fluid Theory equation of state in combination with an entropy scaling approach and compare model predictions to alternative models from the literature. Our model compares excellently to experimental transport coefficients and models from literature with a higher number of adjustable parameters, such as GERG2008, and shows a clear improvement over empirical correlations for transport coefficients of hydrogen. In a second step, we determine the effect of further model reduction by comparing our against a much simpler model applying empirical transport coefficients from the literature. For this purpose, hydrogen is periodically injected into and extracted out of a dome-shaped porous aquifer under a caprock. Our results show that density and viscosity of hydrogen have the highest impact on the pressure field, and that a thermodynamic model like the new model presented here is essential for modeling the storage aquifer, while keeping the number of coefficients at a minimum. In diffusion-dominated settings such as the diffusion of hydrogen through the caprock, our developed diffusion coefficients show a much improved dependence on temperature and pressure, leading to a more accurate approximation of the diffusive fluxes.
  BibTeX
  @article{https://doi.org/10.1029/2021WR030885, abstract = {Abstract Hydrogen is a promising alternative to carbon based energy carriers and may be stored in large quantities in subsurface storage deposits. This work assesses the impact of static (density and phase equilibria) and dynamic (viscosity and diffusion coefficients) properties on the pressure field during the injection and extraction of hydrogen in the porous subsurface. In a first step, we derive transport properties for water, hydrogen and their mixture using the Perturbed-Chain Statistical Associating Fluid Theory equation of state in combination with an entropy scaling approach and compare model predictions to alternative models from the literature. Our model compares excellently to experimental transport coefficients and models from literature with a higher number of adjustable parameters, such as GERG2008, and shows a clear improvement over empirical correlations for transport coefficients of hydrogen. In a second step, we determine the effect of further model reduction by comparing our against a much simpler model applying empirical transport coefficients from the literature. For this purpose, hydrogen is periodically injected into and extracted out of a dome-shaped porous aquifer under a caprock. Our results show that density and viscosity of hydrogen have the highest impact on the pressure field, and that a thermodynamic model like the new model presented here is essential for modeling the storage aquifer, while keeping the number of coefficients at a minimum. In diffusion-dominated settings such as the diffusion of hydrogen through the caprock, our developed diffusion coefficients show a much improved dependence on temperature and pressure, leading to a more accurate approximation of the diffusive fluxes.}, author = {Eller, Johannes and Sauerborn, Tim and Becker, Beatrix and Buntic, Ivan and Gross, Joachim and Helmig, Rainer}, doi = {https://doi.org/10.1029/2021WR030885}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2021WR030885}, journal = {Water Resources Research}, month = {04}, note = {e2021WR030885 2021WR030885}, number = 4, pages = {e2021WR030885}, title = {Modeling Subsurface Hydrogen Storage With Transport Properties From Entropy Scaling Using the PC-SAFT Equation of State}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR030885}, volume = 58, year = 2022 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR030885
15. Weishaupt, K., Koch, T., & Helmig, R. (2022). A fully implicit coupled pore-network/free-flow model for the pore-scale simulation of drying processes. Drying Technology, 40(4), Article 4. https://doi.org/10.1080/07373937.2021.1955706
  Zusammenfassung
  We present a fully coupled pore-network/free-flow model providing pore-scale insight into drying processes. We solve the Navier–Stokes equations with component transport in the free-flow region, coupled to a dynamic two-phase, two-component pore-network model (PNM) in the porous domain. The dynamic multi-physics model allows to temporally resolve drying processes in-between capillary equilibrium states. All simulations are non-isothermal and use pressure- and temperature-depended fluid properties. Carefully chosen coupling conditions and a monolithic solver ensure local conservation of mass, momentum, and energy fluxes, in particular at the interface between both model domains. We solve for wetting and non-wetting fluid pressure fields and consider advective gas transport in the network. Numerical examples demonstrate that the coupled model is able to cover a wide range of physical processes relevant for drying and show the mutual interaction of the two subregions. The model is implemented in the modular open-source framework DuMux such that extensions are straight-forward.
  BibTeX
  @article{doi:10.1080/07373937.2021.1955706, abstract = { We present a fully coupled pore-network/free-flow model providing pore-scale insight into drying processes. We solve the Navier–Stokes equations with component transport in the free-flow region, coupled to a dynamic two-phase, two-component pore-network model (PNM) in the porous domain. The dynamic multi-physics model allows to temporally resolve drying processes in-between capillary equilibrium states. All simulations are non-isothermal and use pressure- and temperature-depended fluid properties. Carefully chosen coupling conditions and a monolithic solver ensure local conservation of mass, momentum, and energy fluxes, in particular at the interface between both model domains. We solve for wetting and non-wetting fluid pressure fields and consider advective gas transport in the network. Numerical examples demonstrate that the coupled model is able to cover a wide range of physical processes relevant for drying and show the mutual interaction of the two subregions. The model is implemented in the modular open-source framework DuMux such that extensions are straight-forward. }, author = {Weishaupt, Kilian and Koch, Timo and Helmig, Rainer}, doi = {10.1080/07373937.2021.1955706}, eprint = {https://doi.org/10.1080/07373937.2021.1955706}, journal = {Drying Technology}, month = {08}, number = 4, pages = {697-718}, publisher = {Taylor & Francis}, title = {A fully implicit coupled pore-network/free-flow model for the pore-scale simulation of drying processes}, url = {/brokenurl# https://doi.org/10.1080/07373937.2021.1955706 }, volume = 40, year = 2022 }
  Link
  /brokenurl# https://doi.org/10.1080/07373937.2021.1955706
16. Weishaupt, K., Koch, T., & Helmig, R. (2021). A fully implicit coupled pore-network/free-flow model for the pore-scale simulation of drying processes. Drying Technology, 0(0), Article 0. https://doi.org/10.1080/07373937.2021.1955706
  Zusammenfassung
  We present a fully coupled pore-network/free-flow model providing pore-scale insight into drying processes. We solve the Navier–Stokes equations with component transport in the free-flow region, coupled to a dynamic two-phase, two-component pore-network model (PNM) in the porous domain. The dynamic multi-physics model allows to temporally resolve drying processes in-between capillary equilibrium states. All simulations are non-isothermal and use pressure- and temperature-depended fluid properties. Carefully chosen coupling conditions and a monolithic solver ensure local conservation of mass, momentum, and energy fluxes, in particular at the interface between both model domains. We solve for wetting and non-wetting fluid pressure fields and consider advective gas transport in the network. Numerical examples demonstrate that the coupled model is able to cover a wide range of physical processes relevant for drying and show the mutual interaction of the two subregions. The model is implemented in the modular open-source framework DuMux such that extensions are straight-forward.
  BibTeX
  @article{weishaupt2021, abstract = { We present a fully coupled pore-network/free-flow model providing pore-scale insight into drying processes. We solve the Navier–Stokes equations with component transport in the free-flow region, coupled to a dynamic two-phase, two-component pore-network model (PNM) in the porous domain. The dynamic multi-physics model allows to temporally resolve drying processes in-between capillary equilibrium states. All simulations are non-isothermal and use pressure- and temperature-depended fluid properties. Carefully chosen coupling conditions and a monolithic solver ensure local conservation of mass, momentum, and energy fluxes, in particular at the interface between both model domains. We solve for wetting and non-wetting fluid pressure fields and consider advective gas transport in the network. Numerical examples demonstrate that the coupled model is able to cover a wide range of physical processes relevant for drying and show the mutual interaction of the two subregions. The model is implemented in the modular open-source framework DuMux such that extensions are straight-forward. }, author = {Weishaupt, Kilian and Koch, Timo and Helmig, Rainer}, doi = {10.1080/07373937.2021.1955706}, eprint = {https://doi.org/10.1080/07373937.2021.1955706}, journal = {Drying Technology}, month = {04}, number = 0, pages = {1--22}, publisher = {Informa {UK} Limited}, title = {A fully implicit coupled pore-network/free-flow model for the pore-scale simulation of drying processes}, url = {https://doi.org/10.1080/07373937.2021.1955706}, volume = 0, year = 2021 }
  Link
  https://doi.org/10.1080/07373937.2021.1955706
17. Kurgyis, K., Hommel, J., Flemisch, B., Helmig, R., & Ott, H. (2021). Explicit continuum scale modeling of low-salinity mechanisms. Journal of Petroleum Science and Engineering, 199, 108336. https://doi.org/10.1016/j.petrol.2020.108336
  Zusammenfassung
  Understanding the influence of injection water composition on the displacement efficiency has been a long-standing issue in reservoir engineering; a reduction of the injection water salinity can lead to additional oil production, which is considered a low-cost and environmentally friendly method for enhanced oil recovery. Several underlying chemical mechanisms have been identified; however, the identification of the governing mechanisms remains difficult and specific to the chemical setting of the reservoir and injection water composition. In this work, we implement two potential mechanisms, namely, double layer expansion and multicomponent ion exchange, to achieve an explicit description of low-salinity effects in the open-source continuum-scale flow simulator DuMuX, with the goal of designing and interpreting experiments, and upscaling the results. By assuming sets of input parameters, we show that there is a minimum required core length dependent on the dispersion of the chemical flooding front dominated by sample heterogeneity. Above this length scale, the saturation profile is fully developed, and the chemical effluent analysis is conclusive, which both is required to calibrate continuum scale models. The change in the chemical water composition shows a characteristic fingerprint for both investigated mechanisms and therefore allows the identification of the leading low-salinity mechanism. The model is publicly available.
  BibTeX
  @article{KURGYIS2021108336, abstract = {Understanding the influence of injection water composition on the displacement efficiency has been a long-standing issue in reservoir engineering; a reduction of the injection water salinity can lead to additional oil production, which is considered a low-cost and environmentally friendly method for enhanced oil recovery. Several underlying chemical mechanisms have been identified; however, the identification of the governing mechanisms remains difficult and specific to the chemical setting of the reservoir and injection water composition. In this work, we implement two potential mechanisms, namely, double layer expansion and multicomponent ion exchange, to achieve an explicit description of low-salinity effects in the open-source continuum-scale flow simulator DuMuX, with the goal of designing and interpreting experiments, and upscaling the results. By assuming sets of input parameters, we show that there is a minimum required core length dependent on the dispersion of the chemical flooding front dominated by sample heterogeneity. Above this length scale, the saturation profile is fully developed, and the chemical effluent analysis is conclusive, which both is required to calibrate continuum scale models. The change in the chemical water composition shows a characteristic fingerprint for both investigated mechanisms and therefore allows the identification of the leading low-salinity mechanism. The model is publicly available.}, author = {Kurgyis, Kata and Hommel, Johannes and Flemisch, Bernd and Helmig, Rainer and Ott, Holger}, doi = {10.1016/j.petrol.2020.108336}, issn = {0920-4105}, journal = {Journal of Petroleum Science and Engineering}, month = {04}, pages = 108336, publisher = {Elsevier {BV}}, title = {Explicit continuum scale modeling of low-salinity mechanisms}, url = {http://www.sciencedirect.com/science/article/pii/S0920410520313905}, volume = 199, year = 2021 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0920410520313905
18. Wang, W. (王文康), Yang, G. (杨光), Evrim, C., Terzis, A., Helmig, R., & Chu, X. (初旭). (2021). An assessment of turbulence transportation near regular and random permeable interfaces. Physics of Fluids, 33(11), Article 11. https://doi.org/10.1063/5.0069311
  - BibTeX
  - Link
  BibTeX
  @article{wang_assessment_2021, annote = {doi: 10.1063/5.0069311}, author = {Wang, Wenkang (王文康) and Yang, Guang (杨光) and Evrim, Cenk and Terzis, Alexandros and Helmig, Rainer and Chu, Xu (初旭)}, doi = {10.1063/5.0069311}, issn = {1070-6631}, journal = {Physics of Fluids}, month = {11}, note = {Publisher: American Institute of Physics}, number = 11, pages = 115103, title = {An assessment of turbulence transportation near regular and random permeable interfaces}, url = {https://doi.org/10.1063/5.0069311}, urldate = {2022-11-16}, volume = 33, year = 2021 }
  Link
  https://doi.org/10.1063/5.0069311
19. Schneider, J., Groh, J., Pütz, T., Helmig, R., Rothfuss, Y., Vereecken, H., & Vanderborght, J. (2021). Prediction of soil evaporation measured with weighable lysimeters using the FAO Penman–Monteith method in combination with Richards’ equation. Vadose Zone Journal, 20(1), Article 1. https://doi.org/10.1002/vzj2.20102
  Zusammenfassung
  Abstract Multiannual data (2016–2018) from 12 weighed lysimeters (four soil types with textures ranging from sandy loam to silt loam, three replicates) of the TERENO SOILCan network were used to evaluate if evaporation (E) rates could be predicted from weather data using the FAO Penman–Monteith (PM) method combined with soil water flow simulations using the Richards equation. Soil hydraulic properties (SHPs) were estimated either from soil texture using the ROSETTA pedotransfer functions, from in situ measured water retention curves, or from soil surface water contents using inverse modeling. In all years, E was water limited and the measured evaporation rates (Em) surprisingly did not vary significantly among the four different soil types. When SHPs derived from pedotransfer functions were used, simulated evaporation rates of the finer textured soils overestimated the measured ones considerably. Better agreement was obtained when simulations were based on in situ measured or inversely estimated SHPs. The SHPs estimated from pedotransfer functions represented unrealistically large characteristic lengths of evaporation (Lc), and Lc was found to be a useful characteristic to constrain estimates of SHPs. Also, when soil evaporation was water limited and Em rates were below Epot (PM evaporation scaled by an empirical coefficient), the diurnal dynamics of Em followed those of Epot. The Richards equation that considers only isothermal liquid water flow did not reproduce these dynamics caused by temperature dependent vapor transport in the soil.
  BibTeX
  @article{schneider_prediction_2021, abstract = {Abstract Multiannual data (2016–2018) from 12 weighed lysimeters (four soil types with textures ranging from sandy loam to silt loam, three replicates) of the TERENO SOILCan network were used to evaluate if evaporation (E) rates could be predicted from weather data using the FAO Penman–Monteith (PM) method combined with soil water flow simulations using the Richards equation. Soil hydraulic properties (SHPs) were estimated either from soil texture using the ROSETTA pedotransfer functions, from in situ measured water retention curves, or from soil surface water contents using inverse modeling. In all years, E was water limited and the measured evaporation rates (Em) surprisingly did not vary significantly among the four different soil types. When SHPs derived from pedotransfer functions were used, simulated evaporation rates of the finer textured soils overestimated the measured ones considerably. Better agreement was obtained when simulations were based on in situ measured or inversely estimated SHPs. The SHPs estimated from pedotransfer functions represented unrealistically large characteristic lengths of evaporation (Lc), and Lc was found to be a useful characteristic to constrain estimates of SHPs. Also, when soil evaporation was water limited and Em rates were below Epot (PM evaporation scaled by an empirical coefficient), the diurnal dynamics of Em followed those of Epot. The Richards equation that considers only isothermal liquid water flow did not reproduce these dynamics caused by temperature dependent vapor transport in the soil.}, author = {Schneider, Jana and Groh, Jannis and Pütz, Thomas and Helmig, Rainer and Rothfuss, Youri and Vereecken, Harry and Vanderborght, Jan}, doi = {https://doi.org/10.1002/vzj2.20102}, journal = {Vadose Zone Journal}, number = 1, pages = {e20102}, title = {Prediction of soil evaporation measured with weighable lysimeters using the FAO Penman–Monteith method in combination with Richards’ equation}, url = {https://acsess.onlinelibrary.wiley.com/doi/abs/10.1002/vzj2.20102}, volume = 20, year = 2021 }
  Link
  https://acsess.onlinelibrary.wiley.com/doi/abs/10.1002/vzj2.20102
20. Gao, B., Coltman, E., Farnsworth, J., Helmig, R., & Smits, K. M. (2021). Determination of Vapor and Momentum Roughness Lengths Above an Undulating Soil Surface Based on PIV-Measured Velocity Profiles. Water Resources Research, 57(7), Article 7. https://doi.org/10.1029/2021WR029578
  Zusammenfassung
  Abstract Accurately predicting bare-soil evaporation requires the proper characterization of the near-surface atmospheric conditions. These conditions, dependent on factors such as surface microtopography and wind velocity, vary greatly and therefore require high-resolution datasets to be fully incorporated into evaporation models. These factors are oftentimes parameterized in models through the aerodynamic resistance (ra), in which the vapor roughness length (z0v) and the momentum roughness length (z0m) are two crucial parameters that describe the transport near the soil-atmosphere interface. Typically, when evaluating bare-soil evaporation, these two characteristic lengths are assumed equal, although differences are likely to occur especially in turbulent flows over undulating surfaces. Thus, this study aims to investigate the relationship between z0v and z0m above undulating surfaces to ultimately improve accuracy in estimating evaporation rate. To achieve this goal, four uniquely designed wind tunnel—soil tank experiments were conducted considering different wind speeds and undulation spacings. Particle image velocimetry (PIV) was used to measure the velocity field above the undulating surface in high resolution. Using the high-fidelity data set, the logarithmic ratio of z0v to z0m is determined and used to estimate ra. Results confirm that these lengths differ significantly, with the logarithmic ratio roughly ranging from −15 to −5 under the conditions tested. PIV-measured results demonstrate this ratio is closely tied to the mass and momentum transport behaviors influenced by surface undulations. Using the data-integrated formulation of ra, predictions of evaporation rate were prepared for both the laboratory and lysimeter experiments, demonstrating the efficacy of the proposed approach in this study.
  BibTeX
  @article{gao2021a, abstract = {Abstract Accurately predicting bare-soil evaporation requires the proper characterization of the near-surface atmospheric conditions. These conditions, dependent on factors such as surface microtopography and wind velocity, vary greatly and therefore require high-resolution datasets to be fully incorporated into evaporation models. These factors are oftentimes parameterized in models through the aerodynamic resistance (ra), in which the vapor roughness length (z0v) and the momentum roughness length (z0m) are two crucial parameters that describe the transport near the soil-atmosphere interface. Typically, when evaluating bare-soil evaporation, these two characteristic lengths are assumed equal, although differences are likely to occur especially in turbulent flows over undulating surfaces. Thus, this study aims to investigate the relationship between z0v and z0m above undulating surfaces to ultimately improve accuracy in estimating evaporation rate. To achieve this goal, four uniquely designed wind tunnel—soil tank experiments were conducted considering different wind speeds and undulation spacings. Particle image velocimetry (PIV) was used to measure the velocity field above the undulating surface in high resolution. Using the high-fidelity data set, the logarithmic ratio of z0v to z0m is determined and used to estimate ra. Results confirm that these lengths differ significantly, with the logarithmic ratio roughly ranging from −15 to −5 under the conditions tested. PIV-measured results demonstrate this ratio is closely tied to the mass and momentum transport behaviors influenced by surface undulations. Using the data-integrated formulation of ra, predictions of evaporation rate were prepared for both the laboratory and lysimeter experiments, demonstrating the efficacy of the proposed approach in this study.}, author = {Gao, Bo and Coltman, Edward and Farnsworth, John and Helmig, Rainer and Smits, Kathleen M.}, doi = {10.1029/2021WR029578}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2021WR029578}, journal = {Water Resources Research}, month = {06}, number = 7, pages = {e2021WR029578}, title = {Determination of Vapor and Momentum Roughness Lengths Above an Undulating Soil Surface Based on PIV-Measured Velocity Profiles}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR029578}, volume = 57, year = 2021 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021WR029578
21. Chu, X., Wang, W., Yang, G., Terzis, A., Helmig, R., & Weigand, B. (2021). Transport of Turbulence Across Permeable Interface in a Turbulent Channel Flow: Interface-Resolved Direct Numerical Simulation. Transport in Porous Media, 136(1), Article 1. https://doi.org/10.1007/s11242-020-01506-w
  Zusammenfassung
  Turbulence transportation across permeable interfaces is investigated using direct numerical simulation, and the connection between the turbulent surface flow and the pore flow is explored. The porous media domain is constructed with an in-line arranged circular cylinder array. The effects of Reynolds number and porosity are also investigated by comparing cases with two Reynolds numbers (\$\$Re\textbackslashapprox 3000,6000\$\$) and two porosities (\$\$\textbackslashvarphi =0.5,0.8\$\$). It was found that the change of porosity leads to the variation of flow motions near the interface region, which further affect turbulence transportation below the interface. The turbulent kinetic energy (TKE) budget shows that turbulent diffusion and pressure transportation work as energy sink and source alternatively, which suggests a possible route for turbulence transferring into porous region. Further analysis on the spectral TKE budget reveals the role of modes of different wavelengths. A major finding is that mean convection not only affects the distribution of TKE in spatial space, but also in scale space. The permeability of the wall also have an major impact on the occurrence ratio between blow and suction events as well as their corresponding flow structures, which can be related to the change of the Kármán constant of the mean velocity profile.
  BibTeX
  @article{chu_transport_2021, abstract = {Turbulence transportation across permeable interfaces is investigated using direct numerical simulation, and the connection between the turbulent surface flow and the pore flow is explored. The porous media domain is constructed with an in-line arranged circular cylinder array. The effects of Reynolds number and porosity are also investigated by comparing cases with two Reynolds numbers (\$\$Re{\textbackslash}approx 3000,6000\$\$) and two porosities (\$\${\textbackslash}varphi =0.5,0.8\$\$). It was found that the change of porosity leads to the variation of flow motions near the interface region, which further affect turbulence transportation below the interface. The turbulent kinetic energy (TKE) budget shows that turbulent diffusion and pressure transportation work as energy sink and source alternatively, which suggests a possible route for turbulence transferring into porous region. Further analysis on the spectral TKE budget reveals the role of modes of different wavelengths. A major finding is that mean convection not only affects the distribution of TKE in spatial space, but also in scale space. The permeability of the wall also have an major impact on the occurrence ratio between blow and suction events as well as their corresponding flow structures, which can be related to the change of the Kármán constant of the mean velocity profile.}, author = {Chu, Xu and Wang, Wenkang and Yang, Guang and Terzis, Alexandros and Helmig, Rainer and Weigand, Bernhard}, doi = {10.1007/s11242-020-01506-w}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {01}, number = 1, pages = {165--189}, title = {Transport of Turbulence Across Permeable Interface in a Turbulent Channel Flow: Interface-Resolved Direct Numerical Simulation}, url = {https://doi.org/10.1007/s11242-020-01506-w}, volume = 136, year = 2021 }
  Link
  https://doi.org/10.1007/s11242-020-01506-w
22. Ackermann, S., Bringedal, C., & Helmig, R. (2021). Multi-scale three-domain approach for coupling free flow and flow in porous media including droplet-related interface processes. Journal of Computational Physics, 429, 109993. https://doi.org/10.1016/j.jcp.2020.109993
  Zusammenfassung
  Drops on a free-flow/porous-medium-flow interface have a strong influence on the exchange of mass, momentum and energy between the two macroscopic flow regimes. Modeling droplet-related pore-scale processes in a macro-scale context is challenging due to the scale gap, but might be rewarding due to relatively low computational costs. We develop a three-domain approach to model drop formation, growth, detachment and film flow in a lower-dimensional interface domain. A simple upscaling technique allows to compute the drop-covered interface area fraction which affects the coupling fluxes. In a first scenario, only drop formation, growth and detachment are taken into account. Then, spreading and merging due to lateral fluxes are considered as well. The simulation results show that the impact of these droplet-related processes can be captured. However, extensions are necessary to represent the influence on the free flow more precisely.
  BibTeX
  @article{ackermann-bringedal-helmig-2021, abstract = {Drops on a free-flow/porous-medium-flow interface have a strong influence on the exchange of mass, momentum and energy between the two macroscopic flow regimes. Modeling droplet-related pore-scale processes in a macro-scale context is challenging due to the scale gap, but might be rewarding due to relatively low computational costs. We develop a three-domain approach to model drop formation, growth, detachment and film flow in a lower-dimensional interface domain. A simple upscaling technique allows to compute the drop-covered interface area fraction which affects the coupling fluxes. In a first scenario, only drop formation, growth and detachment are taken into account. Then, spreading and merging due to lateral fluxes are considered as well. The simulation results show that the impact of these droplet-related processes can be captured. However, extensions are necessary to represent the influence on the free flow more precisely.}, author = {Ackermann, Sina and Bringedal, Carina and Helmig, Rainer}, doi = {https://doi.org/10.1016/j.jcp.2020.109993}, issn = {0021-9991}, journal = {Journal of Computational Physics}, month = {03}, pages = 109993, publisher = {Elsevier BV}, title = {Multi-scale three-domain approach for coupling free flow and flow in porous media including droplet-related interface processes}, url = {http://www.sciencedirect.com/science/article/pii/S0021999120307671}, volume = 429, year = 2021 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0021999120307671
23. Wang, W., Chu, X., Lozano-Durán, A., Helmig, R., & Weigand, B. (2021). Information transfer between turbulent boundary layers and porous media. Journal of Fluid Mechanics, 920, A21. https://doi.org/10.1017/jfm.2021.445
  Zusammenfassung
  The interaction between the flow above and below a permeable wall is a central topic in the study of porous media. While previous investigations have provided compelling evidence of the strong coupling between the two regions, few studies have quantitatively measured the directionality, i.e. cause-and-effect relations, of this interaction. To shed light on the problem, interface-resolved direct numerical simulations of channel flow over a cylinder array for porosity \$\textbackslashvarphi =0.4\$–\$0.9\$ are performed, and the friction Reynolds number of the top smooth wall is controlled to be \$Re\_\\textbackslashtau \\textbackslashapprox 180\$. We use transfer entropy as a marker to evaluate the causal interaction between the free turbulent flow and the porous medium. Correlation analysis and linear coherence spectra are also leveraged to complete the study. Our results show that the permeability of the porous medium has a profound impact on the intensity, time scale and spatial extent of surface–subsurface interactions. The interaction of the free flow and porous medium is further decomposed into two coupling directions, namely, top-down and bottom-up. For low-porosity cases, top-down and bottom-up interactions are strongly asymmetric, the former being mostly influenced by small near-wall eddies, and the latter reflecting the onset of Kelvin–Helmholtz type instabilities due to the perturbation from the porous medium. As the porosity increases, both top-down and bottom-up interactions are dominated by shear-flow instabilities.
  BibTeX
  @article{wang_information_2021, abstract = {The interaction between the flow above and below a permeable wall is a central topic in the study of porous media. While previous investigations have provided compelling evidence of the strong coupling between the two regions, few studies have quantitatively measured the directionality, i.e. cause-and-effect relations, of this interaction. To shed light on the problem, interface-resolved direct numerical simulations of channel flow over a cylinder array for porosity \${\textbackslash}varphi =0.4\$–\$0.9\$ are performed, and the friction Reynolds number of the top smooth wall is controlled to be \$Re\_\{{\textbackslash}tau \}{\textbackslash}approx 180\$. We use transfer entropy as a marker to evaluate the causal interaction between the free turbulent flow and the porous medium. Correlation analysis and linear coherence spectra are also leveraged to complete the study. Our results show that the permeability of the porous medium has a profound impact on the intensity, time scale and spatial extent of surface–subsurface interactions. The interaction of the free flow and porous medium is further decomposed into two coupling directions, namely, top-down and bottom-up. For low-porosity cases, top-down and bottom-up interactions are strongly asymmetric, the former being mostly influenced by small near-wall eddies, and the latter reflecting the onset of Kelvin–Helmholtz type instabilities due to the perturbation from the porous medium. As the porosity increases, both top-down and bottom-up interactions are dominated by shear-flow instabilities.}, author = {Wang, Wenkang and Chu, Xu and Lozano-Durán, Adrián and Helmig, Rainer and Weigand, Bernhard}, doi = {10.1017/jfm.2021.445}, issn = {0022-1120}, journal = {Journal of Fluid Mechanics}, note = {Edition: 2021/06/10Publisher: Cambridge University Press}, pages = {A21}, title = {Information transfer between turbulent boundary layers and porous media}, url = {https://www.cambridge.org/core/article/information-transfer-between-turbulent-boundary-layers-and-porous-media/6791BFCED29848AD37FA3B4D4AA5B684}, volume = 920, year = 2021 }
  Link
  https://www.cambridge.org/core/article/information-transfer-between-turbulent-boundary-layers-and-porous-media/6791BFCED29848AD37FA3B4D4AA5B684
24. Koch, T., Weishaupt, K., Müller, J., Weigand, B., & Helmig, R. (2021). A (Dual) Network Model for Heat Transfer in Porous Media. Transport in Porous Media, 140(1), Article 1. https://doi.org/10.1007/s11242-021-01602-5
  Zusammenfassung
  We present a dual network model to simulate coupled single-phase flow and energy transport in porous media including conditions under which local thermal equilibrium cannot be assumed. The models target applications such as the simulation of catalytic reactors, micro-fluidic experiments, or micro-cooling devices. The new technique is based on a recently developed algorithm that extracts both the pore space and the solid grain matrix of a porous medium from CT images into an interconnected network representation. We simulate coupled heat and mass transfer in these networks simultaneously, allowing naturally to model scenarios with heterogeneous temperature distributions in both void space and solid matrix. The model is compared with 3D conjugate heat transfer simulations for both conduction- and convection-dominated scenarios. It is shown to reproduce effective thermal conductivities over a wide range of fluid to solid thermal conductivity ratios with a single parameter set. Morevoer, it captures local thermal nonequilibrium effects in a micro-cooling device scenario.
  BibTeX
  @article{koch_dual_2021, abstract = {We present a dual network model to simulate coupled single-phase flow and energy transport in porous media including conditions under which local thermal equilibrium cannot be assumed. The models target applications such as the simulation of catalytic reactors, micro-fluidic experiments, or micro-cooling devices. The new technique is based on a recently developed algorithm that extracts both the pore space and the solid grain matrix of a porous medium from CT images into an interconnected network representation. We simulate coupled heat and mass transfer in these networks simultaneously, allowing naturally to model scenarios with heterogeneous temperature distributions in both void space and solid matrix. The model is compared with 3D conjugate heat transfer simulations for both conduction- and convection-dominated scenarios. It is shown to reproduce effective thermal conductivities over a wide range of fluid to solid thermal conductivity ratios with a single parameter set. Morevoer, it captures local thermal nonequilibrium effects in a micro-cooling device scenario.}, author = {Koch, Timo and Weishaupt, Kilian and Müller, Johannes and Weigand, Bernhard and Helmig, Rainer}, doi = {10.1007/s11242-021-01602-5}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {10}, number = 1, pages = {107--141}, title = {A (Dual) Network Model for Heat Transfer in Porous Media}, url = {https://doi.org/10.1007/s11242-021-01602-5}, volume = 140, year = 2021 }
  Link
  https://doi.org/10.1007/s11242-021-01602-5
25. Ahmadi, N., Heck, K., Rolle, M., Helmig, R., & Mosthaf, K. (2021). On multicomponent gas diffusion and coupling concepts for porous media and free flow: a benchmark study. Computational Geosciences, 25(5), Article 5. https://doi.org/10.1007/s10596-021-10057-y
  Zusammenfassung
  Multicomponent gas transport in porous media and at the interface between porous media and free flow occurs in a wide range of technical and environmental systems. Modeling tools are required for the quantitative description of such coupled environmental compartments. We present a benchmark study to compare different diffusion models as well as different coupling concepts employed for the description of multicomponent gas flow and transport at the porous medium/free-flow interface. The benchmark problems allowed us to compare two diffusion models (Fickian and Maxwell-Stefan formulations) for predicting the transport behavior of multicomponent mixtures in porous media and in presence of a free flow. The examples highlighted the importance of interaction between different diffusing components by applying the Maxwell-Stefan formulation, as well as the impact of the free flow velocity on gas migration at the interface under diffusion- and advection-dominated conditions. The problems were solved using two simulation tools, incorporating different coupling concepts to describe the physics of flow and transport processes. In COMSOL Multiphysics, we implemented a single-domain Brinkman approach, whereas in the DuMuX simulator we used a two-domain approach with the Navier-Stokes equation for the free flow and Darcy’s law for the porous medium. Also, the formulation of the Maxwell-Stefan equation for multicomponent transport was different between the two codes. Despite the different modeling concepts, mathematical descriptions and numerical schemes implemented in the two simulators, their outcomes demonstrate excellent agreement for all benchmark problems, as well as the capability to reproduce the results of previous modeling and experimental studies.
  BibTeX
  @article{ahmadi_multicomponent_2021, abstract = {Multicomponent gas transport in porous media and at the interface between porous media and free flow occurs in a wide range of technical and environmental systems. Modeling tools are required for the quantitative description of such coupled environmental compartments. We present a benchmark study to compare different diffusion models as well as different coupling concepts employed for the description of multicomponent gas flow and transport at the porous medium/free-flow interface. The benchmark problems allowed us to compare two diffusion models (Fickian and Maxwell-Stefan formulations) for predicting the transport behavior of multicomponent mixtures in porous media and in presence of a free flow. The examples highlighted the importance of interaction between different diffusing components by applying the Maxwell-Stefan formulation, as well as the impact of the free flow velocity on gas migration at the interface under diffusion- and advection-dominated conditions. The problems were solved using two simulation tools, incorporating different coupling concepts to describe the physics of flow and transport processes. In COMSOL Multiphysics, we implemented a single-domain Brinkman approach, whereas in the DuMuX simulator we used a two-domain approach with the Navier-Stokes equation for the free flow and Darcy’s law for the porous medium. Also, the formulation of the Maxwell-Stefan equation for multicomponent transport was different between the two codes. Despite the different modeling concepts, mathematical descriptions and numerical schemes implemented in the two simulators, their outcomes demonstrate excellent agreement for all benchmark problems, as well as the capability to reproduce the results of previous modeling and experimental studies.}, author = {Ahmadi, Navid and Heck, Katharina and Rolle, Massimo and Helmig, Rainer and Mosthaf, Klaus}, doi = {10.1007/s10596-021-10057-y}, issn = {1573-1499}, journal = {Computational Geosciences}, month = {10}, number = 5, pages = {1493--1507}, title = {On multicomponent gas diffusion and coupling concepts for porous media and free flow: a benchmark study}, url = {https://doi.org/10.1007/s10596-021-10057-y}, volume = 25, year = 2021 }
  Link
  https://doi.org/10.1007/s10596-021-10057-y
26. de Winter, M., Weishaupt, K., Scheller, S., Frey, S., Raoof, A., Hassanizadeh, M., & Helmig, R. (2020). The Complexity of Porous Media Flow Characterized in a Microfluidic Model Based on Confocal Laser Scanning Microscopy and Micro-PIV. Transport in Porous Media. https://doi.org/10.1007/s11242-020-01515-9
  Zusammenfassung
  In this study, the complexity of a steady-state flow through porous media is revealed using confocal laser scanning microscopy (CLSM). Micro-particle image velocimetry (micro-PIV) is applied to construct movies of colloidal particles. The calculated velocity vector fields from images are further utilized to obtain laminar flow streamlines. Fluid flow through a single straight channel is used to confirm that quantitative CLSM measurements can be conducted. Next, the coupling between the flow in a channel and the movement within an intersecting dead-end region is studied. Quantitative CLSM measurements confirm the numerically determined coupling parameter from earlier work of the authors. The fluid flow complexity is demonstrated using a porous medium consisting of a regular grid of pores in contact with a flowing fluid channel. The porous media structure was further used as the simulation domain for numerical modeling. Both the simulation, based on solving Stokes equations, and the experimental data show presence of non-trivial streamline trajectories across the pore structures. In view of the results, we argue that the hydrodynamic mixing is a combination of non-trivial streamline routing and Brownian motion by pore-scale diffusion. The results provide insight into challenges in upscaling hydrodynamic dispersion from pore scale to representative elementary volume (REV) scale. Furthermore, the successful quantitative validation of CLSM-based data from a microfluidic model fed by an electrical syringe pump provided a valuable benchmark for qualitative validation of computer simulation results.
  BibTeX
  @article{de_winter_complexity_2020, abstract = {In this study, the complexity of a steady-state flow through porous media is revealed using confocal laser scanning microscopy (CLSM). Micro-particle image velocimetry (micro-PIV) is applied to construct movies of colloidal particles. The calculated velocity vector fields from images are further utilized to obtain laminar flow streamlines. Fluid flow through a single straight channel is used to confirm that quantitative CLSM measurements can be conducted. Next, the coupling between the flow in a channel and the movement within an intersecting dead-end region is studied. Quantitative CLSM measurements confirm the numerically determined coupling parameter from earlier work of the authors. The fluid flow complexity is demonstrated using a porous medium consisting of a regular grid of pores in contact with a flowing fluid channel. The porous media structure was further used as the simulation domain for numerical modeling. Both the simulation, based on solving Stokes equations, and the experimental data show presence of non-trivial streamline trajectories across the pore structures. In view of the results, we argue that the hydrodynamic mixing is a combination of non-trivial streamline routing and Brownian motion by pore-scale diffusion. The results provide insight into challenges in upscaling hydrodynamic dispersion from pore scale to representative elementary volume (REV) scale. Furthermore, the successful quantitative validation of CLSM-based data from a microfluidic model fed by an electrical syringe pump provided a valuable benchmark for qualitative validation of computer simulation results.}, author = {de Winter, Matthijs and Weishaupt, Kilian and Scheller, Stefan and Frey, Steffen and Raoof, Amir and Hassanizadeh, Majid and Helmig, Rainer}, doi = {10.1007/s11242-020-01515-9}, issn = {1573-1634}, journal = {Transport in Porous Media}, language = {en}, month = {11}, publisher = {Springer Science and Business Media {LLC}}, title = {The Complexity of Porous Media Flow Characterized in a Microfluidic Model Based on Confocal Laser Scanning Microscopy and Micro-{PIV}}, url = {https://doi.org/10.1007/s11242-020-01515-9}, urldate = {2020-11-27}, year = 2020 }
  Link
  https://doi.org/10.1007/s11242-020-01515-9
27. Schneider, M., Weishaupt, K., Gläser, D., Boon, W. M., & Helmig, R. (2020). Coupling staggered-grid and MPFA finite volume methods for free flow/porous-medium flow problems. Journal of Computational Physics, 401. https://doi.org/10.1016/j.jcp.2019.109012
  - BibTeX
  BibTeX
  @article{schneider.etAl2019, author = {Schneider, M. and Weishaupt, K. and Gläser, D. and Boon, W. M. and Helmig, R.}, doi = {https://doi.org/10.1016/j.jcp.2019.109012}, issn = {0021-9991}, journal = {Journal of Computational Physics}, title = {Coupling staggered-grid and MPFA finite volume methods for free flow/porous-medium flow problems}, volume = 401, year = 2020 }
28. 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
  - BibTeX
  - Link
  BibTeX
  @article{Seitz-Seitz-2020-01, author = {Seitz, Gabriele and Helmig, Rainer and Class, Holger}, doi = {10.1016/j.apenergy.2019.114152}, issn = {0306-2619}, journal = {Applied Energy}, month = {02}, pages = 114152, title = {A numerical modeling study on the influence of porosity changes during thermochemical heat storage}, url = {http://www.sciencedirect.com/science/article/pii/S0306261919318392}, volume = 259, year = 2020 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0306261919318392
29. Ghosh, T., Bringedal, C., Helmig, R., & Sekhar, G. P. R. (2020). Upscaled equations for two-phase flow in highly heterogeneous porous media: Varying permeability and porosity. Advances in Water Resources, 145, 103716. https://doi.org/10.1016/j.advwatres.2020.103716
  - BibTeX
  - Link
  BibTeX
  @article{Ghosh2020-01, author = {Ghosh, Tufan and Bringedal, Carina and Helmig, Rainer and Sekhar, G.P. Raja}, doi = {10.1016/j.advwatres.2020.103716}, journal = {Advances in Water Resources}, month = {11}, pages = 103716, publisher = {Elsevier {BV}}, title = {Upscaled equations for two-phase flow in highly heterogeneous porous media: Varying permeability and porosity}, url = {https://doi.org/10.1016/j.advwatres.2020.103716}, volume = 145, year = 2020 }
  Link
  https://doi.org/10.1016/j.advwatres.2020.103716
30. 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), Article 2. https://doi.org/10.1002/cnm.3298
  Zusammenfassung
  Abstract We propose a new mathematical model to learn capillary leakage coefficients from dynamic susceptibility contrast MRI data. To this end, we derive an embedded mixed-dimension flow and transport model for brain tissue perfusion on a subvoxel scale. This model is used to obtain the contrast agent concentration distribution in a single MRI voxel during a perfusion MRI sequence. We further present a magnetic resonance signal model for the considered sequence including a model for local susceptibility effects. This allows modeling MR signal-time curves that can be compared with clinical MRI data. The proposed model can be used as a forward model in the inverse modeling problem of inferring model parameters such as the diffusive capillary wall conductivity. Acute multiple sclerosis lesions are associated with a breach in the integrity of the blood-brain barrier. Applying the model to perfusion MR data of a patient with acute multiple sclerosis lesions, we conclude that diffusive capillary wall conductivity is a good indicator for characterizing activity of lesions, even if other patient-specific model parameters are not well-known.
  BibTeX
  @article{Koch-Koch-2020-01, abstract = {Abstract We propose a new mathematical model to learn capillary leakage coefficients from dynamic susceptibility contrast MRI data. To this end, we derive an embedded mixed-dimension flow and transport model for brain tissue perfusion on a subvoxel scale. This model is used to obtain the contrast agent concentration distribution in a single MRI voxel during a perfusion MRI sequence. We further present a magnetic resonance signal model for the considered sequence including a model for local susceptibility effects. This allows modeling MR signal-time curves that can be compared with clinical MRI data. The proposed model can be used as a forward model in the inverse modeling problem of inferring model parameters such as the diffusive capillary wall conductivity. Acute multiple sclerosis lesions are associated with a breach in the integrity of the blood-brain barrier. Applying the model to perfusion MR data of a patient with acute multiple sclerosis lesions, we conclude that diffusive capillary wall conductivity is a good indicator for characterizing activity of lesions, even if other patient-specific model parameters are not well-known.}, author = {Koch, Timo and Flemisch, Bernd and Helmig, Rainer and Wiest, Roland and Obrist, Dominik}, copyright = {This article is protected by copyright. All rights reserved.}, doi = {10.1002/cnm.3298}, issn = {2040-7947}, journal = {International Journal for Numerical Methods in Biomedical Engineering}, language = {en}, number = 2, pages = {e3298}, title = {A multi-scale sub-voxel perfusion model to estimate diffusive capillary wall conductivity in multiple sclerosis lesions from perfusion {MRI} data}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/cnm.3298}, volume = 36, year = 2020 }
  Link
  https://onlinelibrary.wiley.com/doi/abs/10.1002/cnm.3298
31. Heck, K., Coltman, E., Schneider, J., & Helmig, R. (2020). Influence of Radiation on Evaporation Rates: A Numerical Analysis. Water Resources Research, 56(10), Article 10. https://doi.org/10.1029/2020WR027332
  - BibTeX
  - Link
  BibTeX
  @article{lh2-2020-heck-evaporation, author = {Heck, K. and Coltman, E. and Schneider, J. and Helmig, R.}, doi = {10.1029/2020WR027332}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2020WR027332}, journal = {Water Resources Research}, month = {10}, note = {e2020WR027332 10.1029/2020WR027332}, number = 10, pages = {e2020WR027332}, publisher = {American Geophysical Union ({AGU})}, title = {Influence of Radiation on Evaporation Rates: A Numerical Analysis}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020WR027332}, volume = 56, year = 2020 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020WR027332
32. Koch, T., Helmig, R., & Schneider, M. (2020). A new and consistent well model for one-phase flow in anisotropic porous media using a distributed source model. Journal of Computational Physics, 410, 109369. https://doi.org/10.1016/j.jcp.2020.109369
  - BibTeX
  BibTeX
  @article{Kochetal2020JCPwell, author = {Koch, Timo and Helmig, Rainer and Schneider, Martin}, doi = {https://doi.org/10.1016/j.jcp.2020.109369}, issn = {0021-9991}, journal = {Journal of Computational Physics}, month = {06}, pages = 109369, title = {A new and consistent well model for one-phase flow in anisotropic porous media using a distributed source model}, volume = 410, year = 2020 }
33. Koch, T., Schneider, M., Helmig, R., & Jenny, P. (2020). Modeling tissue perfusion in terms of 1d-3d embedded mixed-dimension coupled problems with distributed sources. Journal of Computational Physics, 410, 109370. https://doi.org/10.1016/j.jcp.2020.109370
  Zusammenfassung
  We present a new method for modeling tissue perfusion on the capillary scale. The microvasculature is represented by a network of one-dimensional vessel segments embedded in the extra-vascular space. Vascular and extra-vascular space exchange fluid over the vessel walls. This exchange is modeled by distributed sources using smooth kernel functions for the extra-vascular domain. It is shown that the proposed method may significantly improve the approximation of the exchange flux, in comparison with existing methods for mixed-dimension embedded problems. Furthermore, the method exhibits better convergence rates of the relevant quantities due to the increased regularity of the extra-vascular pressure solution. Numerical experiments with a vascular network from the rat cortex show that the error in the approximation of the exchange flux for coarse grid resolutions may be decreased by a factor of 3. This may open the way for computing on larger network domains, where a fine grid resolution cannot be achieved in practical simulations due to constraints in computational resources, for example in the context of uncertainty quantification.
  BibTeX
  @article{Kochetal2020JCP1d3dkernel, abstract = {We present a new method for modeling tissue perfusion on the capillary scale. The microvasculature is represented by a network of one-dimensional vessel segments embedded in the extra-vascular space. Vascular and extra-vascular space exchange fluid over the vessel walls. This exchange is modeled by distributed sources using smooth kernel functions for the extra-vascular domain. It is shown that the proposed method may significantly improve the approximation of the exchange flux, in comparison with existing methods for mixed-dimension embedded problems. Furthermore, the method exhibits better convergence rates of the relevant quantities due to the increased regularity of the extra-vascular pressure solution. Numerical experiments with a vascular network from the rat cortex show that the error in the approximation of the exchange flux for coarse grid resolutions may be decreased by a factor of 3. This may open the way for computing on larger network domains, where a fine grid resolution cannot be achieved in practical simulations due to constraints in computational resources, for example in the context of uncertainty quantification.}, author = {Koch, Timo and Schneider, Martin and Helmig, Rainer and Jenny, Patrick}, doi = {10.1016/j.jcp.2020.109370}, issn = {0021-9991}, journal = {Journal of Computational Physics}, month = {06}, pages = 109370, publisher = {Elsevier {BV}}, title = {Modeling tissue perfusion in terms of 1d-3d embedded mixed-dimension coupled problems with distributed sources}, url = {https://doi.org/10.1016/j.jcp.2020.109370}, volume = 410, year = 2020 }
  Link
  https://doi.org/10.1016/j.jcp.2020.109370
34. Weishaupt, K., Terzis, A., Zarikos, I., Yang, G., Flemisch, B., de Winter, D. A. M., & Helmig, R. (2020). A Hybrid-Dimensional Coupled Pore-Network/Free-Flow Model Including Pore-Scale Slip and Its Application to a Micromodel Experiment. Transport in Porous Media, 135(1), Article 1. https://doi.org/10.1007/s11242-020-01477-y
  - BibTeX
  - Link
  BibTeX
  @article{Weishaupt2020, author = {Weishaupt, K. and Terzis, A. and Zarikos, I. and Yang, G. and Flemisch, B. and de Winter, D. A. M. and Helmig, R.}, doi = {10.1007/s11242-020-01477-y}, journal = {Transport in Porous Media}, month = {09}, number = 1, pages = {243--270}, publisher = {Springer Science and Business Media {LLC}}, title = {A Hybrid-Dimensional Coupled Pore-Network/Free-Flow Model Including Pore-Scale Slip and Its Application to a Micromodel Experiment}, url = {https://doi.org/10.1007/s11242-020-01477-y}, volume = 135, year = 2020 }
  Link
  https://doi.org/10.1007/s11242-020-01477-y
35. Coltman, E., Lipp, M., Vescovini, A., & Helmig, R. (2020). Obstacles, Interfacial Forms, and Turbulence: A Numerical Analysis of Soil-Water Evaporation Across Different Interfaces. Transport in porous media, 134(2), Article 2. https://doi.org/10.1007/s11242-020-01445-6
  - BibTeX
  - Link
  BibTeX
  @article{lh2-2020-coltman-turbulence, author = {Coltman, E. and Lipp, M. and Vescovini, A. and Helmig, R.}, doi = {10.1007/s11242-020-01445-6}, journal = {Transport in porous media}, month = {07}, number = 2, pages = {275--301}, publisher = {Springer Science and Business Media {LLC}}, title = {Obstacles, Interfacial Forms, and Turbulence: A Numerical Analysis of Soil-Water Evaporation Across Different Interfaces}, url = {https://doi.org/10.1007/s11242-020-01445-6}, volume = 134, year = 2020 }
  Link
  https://doi.org/10.1007/s11242-020-01445-6
36. 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
  - BibTeX
  - Link
  BibTeX
  @article{frackit-2020-glaeser, author = {Gläser, Dennis and Flemisch, Bernd and Class, Holger and Helmig, Rainer}, doi = {10.21105/joss.02291}, journal = {Journal of Open Source Software}, month = {12}, page = {2291}, title = {Frackit: a framework for stochastic fracture network generation and analysis}, url = {https://joss.theoj.org/papers/10.21105/joss.02291}, volume = 5, year = 2020 }
  Link
  https://joss.theoj.org/papers/10.21105/joss.02291
37. Shokri-Kuehni, S. M. S., Raaijmakers, B., Kurz, T., Or, D., Helmig, R., & Shokri, N. (2020). Water Table Depth and Soil Salinization: From Pore-Scale Processes to Field-Scale Responses. Water Resources Research, 56(2), Article 2. https://doi.org/10.1029/2019WR026707
  - BibTeX
  - Link
  BibTeX
  @article{doi:10.1029/2019WR026707, author = {Shokri-Kuehni, Salomé M. S. and Raaijmakers, Bernadette and Kurz, Theresa and Or, Dani and Helmig, Rainer and Shokri, Nima}, copyright = {©2020. American Geophysical Union. All Rights Reserved.}, doi = {10.1029/2019WR026707}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2019WR026707}, issn = {1944-7973}, journal = {Water Resources Research}, month = {01}, number = 2, pages = {e2019WR026707}, title = {{Water Table Depth and Soil Salinization: From Pore-Scale Processes to Field-Scale Responses}}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019WR026707}, urldate = {2020-02-13}, volume = 56, year = 2020 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019WR026707
38. 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), Article 9. https://doi.org/10.1029/2020WR027600
  - BibTeX
  - Link
  BibTeX
  @article{lh2-2020-heck-gas-component-transport, author = {Bahlmann, L. M. and Smits, K. M. and Heck, K. and Coltman, E. and Helmig, R. and Neuweiler, I.}, doi = {10.1029/2020WR027600}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2020WR027600}, journal = {Water Resources Research}, month = {09}, note = {e2020WR027600 10.1029/2020WR027600}, number = 9, pages = {e2020WR027600}, publisher = {American Geophysical Union ({AGU})}, title = {Gas Component Transport Across the Soil-Atmosphere Interface for Gases of Different Density: Experiments and Modeling}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020WR027600}, volume = 56, year = 2020 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020WR027600
39. Weishaupt, K., Joekar-Niasar, V., & Helmig, R. (2019). An efficient coupling of free flow and porous media flow using the pore-network modeling approach. Journal of Computational Physics: X, 1, 100011. https://doi.org/10.1016/j.jcpx.2019.100011
  - BibTeX
  - Link
  BibTeX
  @article{Weishaupt-Weishaupt-2019-01, author = {Weishaupt, Kilian and Joekar-Niasar, Vahid and Helmig, Rainer}, doi = {10.1016/j.jcpx.2019.100011}, issn = {2590-0552}, journal = {Journal of Computational Physics: X}, month = {01}, pages = 100011, publisher = {Elsevier {BV}}, title = {An efficient coupling of free flow and porous media flow using the pore-network modeling approach}, url = {http://www.sciencedirect.com/science/article/pii/S2590055219300277}, volume = 1, year = 2019 }
  Link
  http://www.sciencedirect.com/science/article/pii/S2590055219300277
40. Yang, G., Terzis, A., Zarikos, I., Hassanizadeh, S. M., Weigand, B., & Helmig, R. (2019). Internal flow patterns of a droplet pinned to the hydrophobic surfaces of a confined microchannel using micro-PIV and VOF simulations. Chemical Engineering Journal, 370, 444–454. https://doi.org/10.1016/j.cej.2019.03.191
  - BibTeX
  - Link
  BibTeX
  @article{Helmig-Yang-2019-01, author = {Yang, Guang and Terzis, Alexandros and Zarikos, Ioannis and Hassanizadeh, S. Majid and Weigand, Bernhard and Helmig, Rainer}, doi = {10.1016/j.cej.2019.03.191}, issn = {1385-8947}, journal = {Chemical Engineering Journal}, month = {08}, pages = {444 - 454}, title = {Internal flow patterns of a droplet pinned to the hydrophobic surfaces of a confined microchannel using micro-PIV and VOF simulations}, url = {http://www.sciencedirect.com/science/article/pii/S1385894719306618}, volume = 370, year = 2019 }
  Link
  http://www.sciencedirect.com/science/article/pii/S1385894719306618
41. Bilke, L., Flemisch, B., Kalbacher, T., Kolditz, O., Helmig, R., & Nagel, T. (2019). Development of Open-Source Porous Media Simulators: Principles and Experiences. Transport in Porous Media, 130(1), Article 1. https://doi.org/10.1007/s11242-019-01310-1
  - BibTeX
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  BibTeX
  @article{Flemisch-Bilke-2019-01, author = {Bilke, Lars and Flemisch, Bernd and Kalbacher, Thomas and Kolditz, Olaf and Helmig, Rainer and Nagel, Thomas}, day = 01, doi = {10.1007/s11242-019-01310-1}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {10}, number = 1, pages = {337--361}, title = {Development of Open-Source Porous Media Simulators: Principles and Experiences}, url = {https://doi.org/10.1007/s11242-019-01310-1}, volume = 130, year = 2019 }
  Link
  https://doi.org/10.1007/s11242-019-01310-1
42. 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
  - BibTeX
  - Link
  BibTeX
  @article{Glaeser-Glaeser-2019-01, author = {Gläser, Dennis and Flemisch, Bernd and Helmig, Rainer and Class, Holger}, doi = {10.1007/s13137-019-0116-8}, issn = {1869-2680}, journal = {GEM - International Journal on Geomathematics}, language = {en}, month = {01}, number = 1, pages = 5, title = {A hybrid-dimensional discrete fracture model for non-isothermal two-phase flow in fractured porous media}, url = {https://doi.org/10.1007/s13137-019-0116-8}, urldate = {2020-01-10}, volume = 10, year = 2019 }
  Link
  https://doi.org/10.1007/s13137-019-0116-8
43. Yang, G., Coltman, E., Weishaupt, K., Terzis, A., Helmig, R., & Weigand, B. (2019). On the Beavers-Joseph interface condition for non-parallel coupled channel flow over a porous structure at high Reynolds numbers. Transport in Porous Media. https://doi.org/10.1007/s11242-019-01255-5
  - BibTeX
  BibTeX
  @article{NULL, author = {Yang, Guang and Coltman, Edward and Weishaupt, Kilian and Terzis, Alexandros and Helmig, Rainer and Weigand, Bernhard}, doi = {10.1007/s11242-019-01255-5}, journal = {Transport in Porous Media}, month = {02}, note = {, IWS2ID=4510 , Partnerinstitution: Institut für Thermodynamik der Luft- und Raumfahrt (ITLR) , Partneraddress: Stuttgart }, title = {On the Beavers-Joseph interface condition for non-parallel coupled channel flow over a porous structure at high Reynolds numbers}, year = 2019 }
44. Zhuang, L., Hassanizadeh, S. M., van Duijn, C. J., Zimmermann, S., Zizina, I., & Helmig, R. (2019). Experimental and Numerical Studies of Saturation Overshoot during Infiltration into a Dry Soil. Vadose Zone Journal, 18(1), Article 1. https://doi.org/10.2136/vzj2018.09.0167
  - BibTeX
  - Link
  BibTeX
  @article{Helmig-Zuang-2019-01, author = {Zhuang, Luwen and Hassanizadeh, S. Majid and van Duijn, C.J. and Zimmermann, Susanne and Zizina, Irina and Helmig, Rainer}, doi = {10.2136/vzj2018.09.0167}, eprint = {https://acsess.onlinelibrary.wiley.com/doi/pdf/10.2136/vzj2018.09.0167}, journal = {Vadose Zone Journal}, month = {05}, number = 1, pages = 180167, title = {Experimental and Numerical Studies of Saturation Overshoot during Infiltration into a Dry Soil}, url = {https://acsess.onlinelibrary.wiley.com/doi/abs/10.2136/vzj2018.09.0167}, volume = 18, year = 2019 }
  Link
  https://acsess.onlinelibrary.wiley.com/doi/abs/10.2136/vzj2018.09.0167
45. Mitra, K., Köppl, T., Duijn, H. van, Pop, I. S., & Helmig, R. (2019). Fronts in two-phase porous media flow problems: the effects of hysteresis and dynamic capillarity. Studies in Applied Mathematics, 1906.08134. https://research.tue.nl/en/publications/fronts-in-two-phase-porous-media-flow-problems-the-effects-of-hys
  - BibTeX
  - Link
  BibTeX
  @article{Helmig-Mitra-2019-01, author = {Mitra, Koondanibha and Köppl, Tobias and Duijn, Hans van and Pop, Iuliu Sorin and Helmig, Rainer}, issn = {0022-2526}, journal = {Studies in Applied Mathematics}, language = {English}, month = {07}, pages = {1906.08134}, publisher = {Wiley-Blackwell}, shorttitle = {Fronts in two-phase porous media flow problems}, title = {Fronts in two-phase porous media flow problems: the effects of hysteresis and dynamic capillarity}, url = {https://research.tue.nl/en/publications/fronts-in-two-phase-porous-media-flow-problems-the-effects-of-hys}, year = 2019 }
  Link
  https://research.tue.nl/en/publications/fronts-in-two-phase-porous-media-flow-problems-the-effects-of-hys
46. Vidotto, Ettore., Koch, Timo., Köppl, Tobias., Helmig, Rainer., & Wohlmuth, Barbara. (2019). Hybrid Models for Simulating Blood Flow in Microvascular Networks. Multiscale Modeling & Simulation, 17(3), Article 3. https://doi.org/10.1137/18M1228712
  - BibTeX
  - Link
  BibTeX
  @article{Koch-Vidotto-2019-01, author = {Vidotto, Ettore. and Koch, Timo. and Köppl, Tobias. and Helmig, Rainer. and Wohlmuth, Barbara.}, doi = {10.1137/18M1228712}, issn = {1540-3459}, journal = {Multiscale Modeling \& Simulation}, month = {01}, number = 3, pages = {1076--1102}, title = {Hybrid {Models} for {Simulating} {Blood} {Flow} in {Microvascular} {Networks}}, url = {https://epubs.siam.org/doi/10.1137/18M1228712}, urldate = {2020-01-10}, volume = 17, year = 2019 }
  Link
  https://epubs.siam.org/doi/10.1137/18M1228712
47. Yang, G., Vaikuntanathan, V., Terzis, A., Cheng, X., Weigand, B., & Helmig, R. (2019). Impact of a linear array of hydrophilic and superhydrophobic spheres on a deep water pool. Colloids and Interfaces. https://doi.org/10.3390/colloids3010029
  - BibTeX
  BibTeX
  @article{NULL, author = {Yang, Guang and Vaikuntanathan, Visakh and Terzis, Alexandros and Cheng, Xin and Weigand, Bernhard and Helmig, Rainer}, doi = {10.3390/colloids3010029}, journal = {Colloids and Interfaces}, month = {01}, note = {, IWS2ID=4566 , Partnerinstitution: Institut für Thermodynamik der Luft- und Raumfahrt (ITLR), Shanghai Jiao Tong University , Partneraddress: }, title = {Impact of a linear array of hydrophilic and superhydrophobic spheres on a deep water pool}, year = 2019 }
48. Terzis, A., Zarikos, I., Weishaupt, K., Yang, G., Chu, X., Helmig, R., & Weigand, B. (2019). Microscopic velocity field measurements inside a regular porous medium adjacent to a low Reynolds number channel flow. Physics of Fluids, 31(4), Article 4. https://doi.org/10.1063/1.5092169
  - BibTeX
  - Link
  BibTeX
  @article{Weishaupt-Terzis-2019-01, author = {Terzis, A. and Zarikos, I. and Weishaupt, K. and Yang, G. and Chu, X. and Helmig, R. and Weigand, B.}, doi = {10.1063/1.5092169}, issn = {1070-6631}, journal = {Physics of Fluids}, month = {04}, number = 4, pages = 042001, publisher = {{AIP} Publishing}, title = {Microscopic velocity field measurements inside a regular porous medium adjacent to a low Reynolds number channel flow}, url = {https://aip.scitation.org/doi/full/10.1063/1.5092169}, urldate = {2020-01-10}, volume = 31, year = 2019 }
  Link
  https://aip.scitation.org/doi/full/10.1063/1.5092169
49. Schneider, M., Gläser, D., Flemisch, B., & Helmig, R. (2018). Comparison of finite-volume schemes for diffusion problems. Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles, 73. https://ogst.ifpenergiesnouvelles.fr/articles/ogst/pdf/2018/01/ogst180050.pdf
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Schneider, Martin and Gläser, Dennis and Flemisch, Bernd and Helmig, Rainer}, journal = {Oil & Gas Science and Technology – Revue d'IFP Energies nouvelles}, month = {12}, note = {, IWS2ID=4565 , Partnerinstitution: IFP Energies nouvelles , Partneraddress: Rueil Malmaison }, title = {Comparison of finite-volume schemes for diffusion problems}, url = {https://ogst.ifpenergiesnouvelles.fr/articles/ogst/pdf/2018/01/ogst180050.pdf}, volume = 73, year = 2018 }
  Link
  https://ogst.ifpenergiesnouvelles.fr/articles/ogst/pdf/2018/01/ogst180050.pdf
50. Gao, B., Davarzani, H., Helmig, R., & Smits, K. M. (2018). Experimental and numerical study of evaporation from wavy surfaces by coupling free flow and porous media flow. Water Resources Research. https://doi.org/10.1029/2018WR023423
  - BibTeX
  BibTeX
  @article{NULL, author = {Gao, Bo and Davarzani, Hossein and Helmig, Rainer and Smits, Kathleen M.}, doi = {10.1029/2018WR023423}, journal = {Water Resources Research}, month = {11}, note = {, IWS2ID=4550 , Partnerinstitution: Colorado School of Mines, Bureau de Recherches Géologiques et Minières , Partneraddress: Golden, Colorado, USA, Orléans, Frankreich }, title = {Experimental and numerical study of evaporation from wavy surfaces by coupling free flow and porous media flow}, year = 2018 }
51. 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
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Schneider, Martin and Köppl, Tobias and Helmig, Rainer and Steinle, Rouven and Hilfer, Rudolf}, doi = {10.1007/s11242-017-0977-y}, journal = {Transport in Porous Media}, month = {11}, note = {, IWS2ID=4489 , Partnerinstitution: Institut für Computerphysik }, number = 3, page = {621-641}, title = {Stable propagation of saturation overshoots for two-phase flow in porous media}, url = {https://doi.org/10.1007/s11242-017-0977-y}, volume = 121, year = 2018 }
  Link
  https://doi.org/10.1007/s11242-017-0977-y
52. Praditia, T., Helmig, R., & Hajibeygi, H. (2018). Multiscale formulation for coupled flow-heat equations arising from single-phase flow in fractured geothermal reservoirs. Computational Geosciences. https://doi.org/10.1007/s10596-018-9754-4
  - BibTeX
  BibTeX
  @article{NULL, author = {Praditia, Timothy and Helmig, Rainer and Hajibeygi, Hadi}, doi = {10.1007/s10596-018-9754-4}, journal = {Computational Geosciences}, month = {11}, note = {, IWS2ID=4491 , Partnerinstitution: Delft University of Technology }, title = {Multiscale formulation for coupled flow-heat equations arising from single-phase flow in fractured geothermal reservoirs}, year = 2018 }
53. Vidotto, E., Helmig, R., Schneider, M., & Wohlmuth, B. (2018). Streamline method for resolving sharp fronts for complex two-phase flow in porous media. Computational Geosciences, 22(6), Article 6. https://doi.org/10.1007/s10596-018-9767-z
  Zusammenfassung
  In this paper, we present a fast streamline-based numerical method for the two-phase flow equations in high-rate flooding scenarios for incompressible fluids in heterogeneous and anisotropic porous media. A fractional flow formulation is adopted and a discontinuous Galerkin method (DG) is employed to solve the pressure equation. Capillary effects can be neglected in high-rate flooding scenarios. This allows us to present an improved streamline approach in combination with the one-dimensional front tracking method to solve the transport equation. To handle the high computational costs of the DG approximation, domain decomposition is applied combined with an algebraic multigrid preconditioner to solve the linear system. Special care at the interior interfaces is required and the streamline tracer has to include a dynamic communication strategy. The method is validated in various two- and three-dimensional tests, where comparisons of the solutions in terms of approximation of flow front propagation with standard fully implicit finite-volume methods are provided.
  BibTeX
  @article{Vidotto2018, abstract = {In this paper, we present a fast streamline-based numerical method for the two-phase flow equations in high-rate flooding scenarios for incompressible fluids in heterogeneous and anisotropic porous media. A fractional flow formulation is adopted and a discontinuous Galerkin method (DG) is employed to solve the pressure equation. Capillary effects can be neglected in high-rate flooding scenarios. This allows us to present an improved streamline approach in combination with the one-dimensional front tracking method to solve the transport equation. To handle the high computational costs of the DG approximation, domain decomposition is applied combined with an algebraic multigrid preconditioner to solve the linear system. Special care at the interior interfaces is required and the streamline tracer has to include a dynamic communication strategy. The method is validated in various two- and three-dimensional tests, where comparisons of the solutions in terms of approximation of flow front propagation with standard fully implicit finite-volume methods are provided.}, author = {Vidotto, Ettore and Helmig, Rainer and Schneider, Martin and Wohlmuth, Barbara}, day = 01, doi = {10.1007/s10596-018-9767-z}, issn = {1573-1499}, journal = {Computational Geosciences}, month = {12}, number = 6, pages = {1487--1502}, title = {Streamline method for resolving sharp fronts for complex two-phase flow in porous media}, url = {https://doi.org/10.1007/s10596-018-9767-z}, volume = 22, year = 2018 }
  Link
  https://doi.org/10.1007/s10596-018-9767-z
54. Schneider, M., Flemisch, B., Helmig, R., Terekhov, K., & Tchelepi, H. (2018). Monotone nonlinear finite-volume method for challenging grids. Computational Geosciences. https://doi.org/10.1007/s10596-017-9710-8
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Schneider, Martin and Flemisch, Bernd and Helmig, Rainer and Terekhov, Kirill and Tchelepi, Hamdi}, doi = {10.1007/s10596-017-9710-8}, journal = {Computational Geosciences}, month = {01}, note = {, IWS2ID=4426 , Partneraddress: Stanford, California, USA }, title = {Monotone nonlinear finite-volume method for challenging grids}, url = {https://doi.org/10.1007/s10596-017-9710-8}, year = 2018 }
  Link
  https://doi.org/10.1007/s10596-017-9710-8
55. Köppl, T., Fedoseyev, M., & Helmig, R. (2018). Simulation of surge reduction systems using dimensionally reduced models. Journal of Hydraulic Engineering. https://doi.org/10.1061/(ASCE)HY.1943-7900.0001553
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Köppl, Tobias and Fedoseyev, Mikhail and Helmig, Rainer}, doi = {10.1061/(ASCE)HY.1943-7900.0001553}, journal = {Journal of Hydraulic Engineering}, month = {12}, note = {, IWS2ID=4466 , Partnerinstitution: Gubkin Russian State University of Oil and Gas , Partneraddress: Moscow, Russia }, title = {Simulation of surge reduction systems using dimensionally reduced models}, url = {https://ascelibrary.org/doi/10.1061/%28ASCE%29HY.1943-7900.0001553}, year = 2018 }
  Link
  https://ascelibrary.org/doi/10.1061/%28ASCE%29HY.1943-7900.0001553
56. Becker, B., Guo, B., Bandilla, K., Celia, M. A., Flemisch, B., & Helmig, R. (2018). An adaptive multiphysics model coupling vertical equilibrium and full multidimensions for multiphase flow in porous media. Water Resources Research, 54. https://doi.org/10.1029/2017WR022303
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Becker, Beatrix and Guo, Bo and Bandilla, Karl and Celia, Michael A. and Flemisch, Bernd and Helmig, Rainer}, doi = {10.1029/2017WR022303}, journal = {Water Resources Research}, month = {05}, note = {, IWS2ID=4512 , Partnerinstitution: Stanford University, Dept. of Energy Resources Engineering, Princeton University, Dept. of Civil and Environmental Engineering }, page = {4347-4360}, title = {An adaptive multiphysics model coupling vertical equilibrium and full multidimensions for multiphase flow in porous media}, url = {https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2017WR022303}, volume = 54, year = 2018 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2017WR022303
57. Koch, T., Heck, K., Schröder, N., Class, H., & Helmig, R. (2018). A new simulation framework for soil-root interaction, evaporation, root growth, and solute transport. Vadose Zone Journal. https://doi.org/10.2136/vzj2017.12.0210
  - BibTeX
  BibTeX
  @article{NULL, author = {Koch, Timo and Heck, Katharina and Schröder, Natalie and Class, Holger and Helmig, Rainer}, doi = {10.2136/vzj2017.12.0210}, journal = {Vadose Zone Journal}, month = {08}, note = {, IWS2ID=4546 }, title = {A new simulation framework for soil-root interaction, evaporation, root growth, and solute transport}, year = 2018 }
58. Köppl, T., Santin, G., Haasdonk, B., & Helmig, R. (2018). Numerical modelling of a peripheral arterial stenosis using dimensionally reduced models and machine learning techniques. International Journal for Numerical Methods in Biomedical Engineering. https://doi.org/10.1002/cnm.3095
  - BibTeX
  BibTeX
  @article{NULL, author = {Köppl, Tobias and Santin, Gabriele and Haasdonk, Bernard and Helmig, Rainer}, doi = {10.1002/cnm.3095}, journal = {International Journal for Numerical Methods in Biomedical Engineering}, month = {12}, note = {, IWS2ID=4481 , Partnerinstitution: Institut für Angewandte Analysis und Numerische Simulation }, title = {Numerical modelling of a peripheral arterial stenosis using dimensionally reduced models and machine learning techniques}, year = 2018 }
59. Gläser, D., Helmig, R., Flemisch, B., & Class, H. (2017). A discrete fracture model for two-phase flow in fractured porous media. Advances in Water Resources, 110. https://doi.org/10.1016/j.advwatres.2017.10.031
  - BibTeX
  BibTeX
  @article{NULL, author = {Gläser, Dennis and Helmig, Rainer and Flemisch, Bernd and Class, Holger}, doi = {10.1016/j.advwatres.2017.10.031}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=4485 }, page = {335-348}, title = {A discrete fracture model for two-phase flow in fractured porous media}, volume = 110, year = 2017 }
60. Terzis, A., Roumeli, E., Weishaupt, K., Brack, S., Aslannejad, H., Groß, J., Hassanizadeh, S. M., Helmig, R., & Weigand, B. (2017). Heat release at the wetting front during capillary filling of cellulosic micro-substrates. Journal of Colloid and Interface Science. https://doi.org/10.1016/j.jcis.2017.06.027
  - BibTeX
  BibTeX
  @article{NULL, author = {Terzis, Alexandros and Roumeli, Eleftheria and Weishaupt, Kilian and Brack, Stefan and Aslannejad, Hamed and Groß, Joachim and Hassanizadeh, S. Majid and Helmig, Rainer and Weigand, Bernhard}, doi = {10.1016/j.jcis.2017.06.027}, journal = {Journal of Colloid and Interface Science}, month = {05}, note = {, IWS2ID=4458 }, title = {Heat release at the wetting front during capillary filling of cellulosic micro-substrates}, year = 2017 }
61. Gupta, S., Deusner, C., Haeckel, M., Helmig, R., & Wohlmuth, B. I. (2017). Testing a thermo-chemo-hydro-geomechanical model for gas hydrate bearing sediments using triaxial compression lab experiments. https://doi.org/10.1002/2017GC006901
  - BibTeX
  BibTeX
  @article{NULL, author = {Gupta, Shubhangi and Deusner, Christian and Haeckel, Matthias and Helmig, Rainer and Wohlmuth, Barbara I.}, doi = {10.1002/2017GC006901}, month = {07}, note = {, IWS2ID=4474 , Partnerinstitution: Helmholtz-Zentrum für Ozeanforschung, Kiel, Lehrstuhl für Numerische Mathematik, TU München }, title = {Testing a thermo-chemo-hydro-geomechanical model for gas hydrate bearing sediments using triaxial compression lab experiments}, year = 2017 }
62. 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
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  BibTeX
  @article{NULL, author = {Becker, Beatrix and Guo, Bo and Bandilla, Karl and Celia, Michael A. and Flemisch, Bernd and Helmig, Rainer}, doi = {10.1002/2017WR021644}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=4502 , Partnerinstitution: Stanford University, Dept. of Energy Resources Engineering, Princeton University, Dept. of Civil and Environmental Engineering , Partneraddress: Stanford, California, USA, Princeton, NJ, USA }, page = {10,491-10,507}, title = {A pseudo-vertical equilibrium model for slow gravity drainage dynamics}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2017/Becker_et_al-2017-Water_Resources_Research.pdf}, volume = 53, year = 2017 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2017/Becker_et_al-2017-Water_Resources_Research.pdf
63. Jabbari, M., Shojaee Nasirabadi, P., Jambhekar, V. A., Hattel, J. H., & Helmig, R. (2017). Drying of a tape-cast layer: Numerical investigation of influencing parameters. International Journal of Heat and Mass Transfer, 108. https://doi.org/10.1016/j.ijheatmasstransfer.2017.01.074
  - BibTeX
  BibTeX
  @article{NULL, author = {Jabbari, Mirmasoud and Shojaee Nasirabadi, Parizad and Jambhekar, Vishal Arun and Hattel, Jesper Henri and Helmig, Rainer}, doi = {10.1016/j.ijheatmasstransfer.2017.01.074}, journal = {International Journal of Heat and Mass Transfer}, month = {10}, note = {, IWS2ID=4394 , Partnerinstitution: Warwick Manufacturing Group, University of Warwick and Dept. of Mechanical Engineering, TU Denmark }, page = {2229-2238}, title = {Drying of a tape-cast layer: Numerical investigation of influencing parameters}, volume = 108, year = 2017 }
64. 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
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  BibTeX
  @article{NULL, author = {Yang, Guang and Weigand, Bernhard and Terzis, Alexandros and Weishaupt, Kilian and Helmig, Rainer}, doi = {10.1007/s11242-017-0995-9}, journal = {Transport in Porous Media}, month = {08}, note = {, IWS2ID=4472 , Partnerinstitution: Institut für Thermodynamik der Luft- und Raumfahrt (ITLR) , Partneraddress: Stuttgart }, page = {01--23}, title = {Numerical simulation of turbulent flow and heat transfer in a three-dimensional channel coupled with flow through porous structures}, volume = 120, year = 2017 }
65. Mejri, E., Bouhlila, R., & Helmig, R. (2017). Heterogeneity effects on evaporation-induced halite and gypsum co-precipitation in porous media. Transport in Porous Media. https://doi.org/10.1007/s111242-017-0846-8
  - BibTeX
  BibTeX
  @article{NULL, author = {Mejri, Emna and Bouhlila, Rachida and Helmig, Rainer}, doi = {10.1007/s111242-017-0846-8}, journal = {Transport in Porous Media}, month = {03}, note = {, IWS2ID=4427 }, title = {Heterogeneity effects on evaporation-induced halite and gypsum co-precipitation in porous media}, year = 2017 }
66. 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.
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  BibTeX
  @article{NULL, author = {Trautz, Andrew and Illangasekare, Tissa and Rodriguez-Iturbe, Ignacio and Heck, Katharina and Helmig, Rainer}, journal = {Water Resources Research}, month = {04}, note = {, IWS2ID=4464 , Partneraddress: Golden, Colorado, USA }, page = {3319-3340}, title = {Development of an experimental approach to study coupled soil-plant-atmosphere processes using plant analogs}, volume = 53, year = 2017 }
67. 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
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  BibTeX
  @article{NULL, author = {Fetzer, Thomas and Vanderborght, Jan and Mosthaf, Klaus and Smits, Kathleen M. and Helmig, Rainer}, doi = {10.1002/2016WR019983}, journal = {Water Resources Research}, month = {10}, note = {, IWS2ID=4403 , Partnerinstitution: Forschungszentrum Jülich (FZJ), TU Denmark, Colorado School of Mines }, number = 2, page = {1080-1100}, title = {Heat and water transport in soils and across the soil-atmosphere interface: 2. Numerical analysis}, volume = 53, year = 2017 }
68. 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
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  @article{NULL, author = {Vanderborght, Jan and Fetzer, Thomas and Mosthaf, Klaus and Smits, Kathleen M. and Helmig, Rainer}, doi = {10.1002/2016WR019982}, journal = {Water Resources Research}, month = {10}, note = {, IWS2ID=4402 , Partnerinstitution: Forschungszentrum Jülich (FZJ), TU Denmark, Colorado School of Mines }, number = 2, page = {1057-1079}, title = {Heat and water transport in soils and across the soil-atmosphere interface: 1. Theory and different model concepts}, volume = 53, year = 2017 }
69. Neuweiler, I., & Helmig, R. (2017). Debates - Hypothesis testing in hydrology: a subsurface perspective. Water Resources Research, 53. https://doi.org/1002/2016WR020047
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  BibTeX
  @article{NULL, author = {Neuweiler, Insa and Helmig, Rainer}, doi = {1002/2016WR020047}, journal = {Water Resources Research}, month = {03}, note = {, IWS2ID=4473 , Partnerinstitution: Institut für Strömungsmechanik und Umweltphysik im Bauwesen, Universität Hannover , Partneraddress: Hannover }, page = {1784-1791}, title = {Debates - Hypothesis testing in hydrology: a subsurface perspective}, volume = 53, year = 2017 }
70. 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
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  BibTeX
  @article{NULL, author = {Schneider, Martin and Flemisch, Bernd and Helmig, Rainer}, doi = {10.1002/fld.4352}, journal = {International Journal for Numerical Methods in Fluids}, month = {01}, note = {, IWS2ID=4354 }, number = 6, page = {352-381}, title = {Monotone nonlinear finite-volume method for nonisothermal two-phase two-component flow in porous media}, url = {https://onlinelibrary.wiley.com/doi/10.1002/fld.4352/full}, volume = 84, year = 2017 }
  Link
  https://onlinelibrary.wiley.com/doi/10.1002/fld.4352/full
71. 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.
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  BibTeX
  @article{NULL, author = {Fattahi, Ehsan and Waluga, Christian and Wohlmuth, Barbara I. and Rüde, Ulrich and Manhard, Michael and Helmig, Rainer}, journal = {Computers and fluids}, month = {11}, note = {, IWS2ID=4405 }, page = {247-259}, title = {Lattice Boltzmann methods in porous media simulations: laminar to turbulent flow}, volume = 140, year = 2016 }
72. 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
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  BibTeX
  @article{NULL, author = {Hommel, Johannes and Ebigbo, Anozie and Gerlach, Robin and Cunningham, Alfred B. and Helmig, Rainer and Class, Holger}, doi = {10.1016/j.egypro.2016.10.028}, journal = {Energy Procedia}, month = {11}, note = {, IWS2ID=4408 , Partnerinstitution: Montana State University }, page = {379-386}, title = {Finding a balance between accuracy and effort for modeling biomineralization}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2016/Hommel_EgyPro_2016.pdf}, volume = 97, year = 2016 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2016/Hommel_EgyPro_2016.pdf
73. 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
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  BibTeX
  @article{NULL, author = {Gupta, Shubhangi and Wohlmuth, Barbara I. and Helmig, Rainer}, doi = {10.1016/j.advwatres.2016.02.013}, journal = {Advances in Water Resources}, month = {05}, note = {, IWS2ID=4370 , Partnerinstitution: Lehrstuhl für Numerische Mathematik , Partneraddress: TU München }, page = {78-87}, title = {Multi-rate time stepping schemes for hydro-geomechanical model for subsurface methane hydrate reservoirs}, volume = 91, year = 2016 }
74. 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
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  BibTeX
  @article{NULL, author = {Lindner, Franz and Nuske, Philipp and Weishaupt, Kilian and Helmig, Rainer and Mundt, Christian and Pfitzner, Michael}, doi = {10.1615/JPorMedia.v19.i2.30}, journal = {Journal of Porous Media}, month = {01}, note = {, IWS2ID=4373 }, page = {131-153}, title = {Transpiration cooling with local thermal nonequilibrium: Model comparison in multiphase flow in porous media}, url = {https://www.dl.begellhouse.com/journals/49dcde6d4c0809db,756c5cb610533dc8,29b3011f079da782.html}, volume = 19, year = 2016 }
  Link
  https://www.dl.begellhouse.com/journals/49dcde6d4c0809db,756c5cb610533dc8,29b3011f079da782.html
75. 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
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  BibTeX
  @article{NULL, author = {Jambhekar, Vishal Arun and Mejri, Emna and Schröder, Natalie and Helmig, Rainer and Shokri, Nima}, doi = {10.1007/s11242-016-0665-3}, journal = {Transport in Porous Media}, month = {03}, note = {, IWS2ID=4347 }, title = {Kinetic Approach to Model Reactive Transport and Mixed Salt Precipitation in a Coupled Free-Flow–Porous-Media System}, year = 2016 }
76. 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
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  BibTeX
  @article{Glaeser-Glaeser-2016-01, author = {Gläser, D. and Dell’Oca, A. and Tatomir, A. and Bensabat, J. and Class, H. and Guadagnini, A. and Helmig, R. and McDermott, C. and Riva, M. and Sauter, M.}, doi = {10.1016/j.egypro.2016.10.030}, issn = {1876-6102}, journal = {Energy Procedia}, language = {en}, month = {11}, note = {European Geosciences Union General Assembly 2016, EGU Division Energy, Resources \& the Environment (ERE)}, pages = {387--394}, series = {European {Geosciences} {Union} {General} {Assembly} 2016, {EGU} {Division} {Energy}, {Resources} \& the {Environment} ({ERE})}, title = {An {Approach} {Towards} a {FEP}-based {Model} for {Risk} {Assessment} for {Hydraulic} {Fracturing} {Operations}}, url = {http://www.sciencedirect.com/science/article/pii/S187661021630978X}, urldate = {2020-01-14}, volume = 97, year = 2016 }
  Link
  http://www.sciencedirect.com/science/article/pii/S187661021630978X
77. 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
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  @article{NULL, author = {Baber, Katherina and Flemisch, Bernd and Helmig, Rainer}, journal = {International Journal of Heat and Mass Transfer}, month = {07}, note = {to appear, IWS2ID=2989 }, title = {Modelling drop dynamics at the interface between free and porous-medium flow using the mortar method}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2014/SimTech_Preprint_Baber2014.pdf}, year = 2016 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2014/SimTech_Preprint_Baber2014.pdf
78. 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
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  BibTeX
  @article{NULL, author = {Hommel, Johannes and Lauchnor, Ellen and Gerlach, Robin and Cunningham, Alfred B. and Ebigbo, Anozie and Helmig, Rainer and Class, Holger}, doi = {10.1007/s11242-015-0617-3}, journal = {Transport in Porous Media}, month = {12}, note = {, IWS2ID=3133 , Partnerinstitution: Montana State University , Partneraddress: Bozeman, Montana, USA }, number = 2, page = {557-579}, title = {Investigating the influence of the initial biomass distribution and injection strategies on biofilm-mediated calcite precipitation in porous media}, url = {http://rdcu.be/jUty}, volume = 114, year = 2016 }
  Link
  http://rdcu.be/jUty
79. 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.
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  BibTeX
  @article{NULL, author = {Drzisga, Daniel and Köppl, Tobias and Pohl, Ulrich and Helmig, Rainer and Wohlmuth, Barbara I.}, journal = {Computers in Biology and Medicine}, month = {05}, note = {, IWS2ID=4336 , Partnerinstitution: Lehrstuhl für Numerische Mathematik , Partneraddress: TU München }, number = 70, page = {190-201}, title = {Numerical modeling of compensation mechanisms for peripheral arterial stenoses}, year = 2016 }
80. 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
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  BibTeX
  @article{NULL, author = {Fetzer, Thomas and Smits, Kathleen M. and Helmig, Rainer}, doi = {10.1007/s11242-016-0654-6}, journal = {Transport in Porous Media}, month = {04}, note = {, IWS2ID=3053 }, number = 2, page = {395-424}, title = {Effect of Turbulence and Roughness on Coupled Porous-Medium/Free-Flow Exchange Processes}, volume = 114, year = 2016 }
81. 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
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  BibTeX
  @article{NULL, author = {Jabbari, Mirmasoud and Jambhekar, Vishal Arun and Hattel, Jesper Henri and Helmig, Rainer}, doi = {10.1016/j.ijheatmasstransfer.2016.08.073}, journal = {International Journal of Heat and Mass Transfer}, month = {12}, note = {, IWS2ID=4392 , Partnerinstitution: Warwick Manufacturing Group, University of Warwick and Dept. of Mechanical Engineering, TU Denmark , Partneraddress: Coventry, UK and Lyngby, Denmark }, page = {1144-1154}, title = {Drying of a tape-cast layer: Numerical modelling of the evaporation process in a graded/layered material}, volume = 103, year = 2016 }
82. 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
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  @article{NULL, author = {Helmig, Rainer and Hassanizadeh, S. Majid and Dahle, Helge K.}, doi = {10.1007/s11242-016-0736-5}, journal = {Transport in Porous Media}, month = {07}, note = {, IWS2ID=4390 }, page = {235-236}, title = {Foreword. NUPUS: Porous media research has got a brand name}, volume = 114, year = 2016 }
83. 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.
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  @article{NULL, author = {Szymanska, Paulina and Tisler, Witold and Schütz, Cindi and Szymkiewicz, Adam and Neuweiler, Insa and Helmig, Rainer}, journal = {Acta Geophysica}, month = {12}, note = {, IWS2ID=4417 , Partnerinstitution: Gdansk University of Technology und Institut für Strömungsmechanik und Umweltphysik im Bauwesen,Leibniz Universität Hannover }, page = {2487-2509}, title = {Experimental and numerical analysis of air trapping in a porous medium with coarse textured inclusions}, volume = 64, year = 2016 }
84. 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
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  BibTeX
  @article{Hommel2015a, author = {Hommel, Johannes and Lauchnor, Ellen and Phillips, Adrienne and Gerlach, Robin and Cunningham, Alfred B. and Helmig, Rainer and Ebigbo, Anozie and Class, Holger}, doi = {10.1002/2014WR016503}, journal = {Water Resources Research}, month = {05}, note = {, IWS2ID=3059 , Partnerinstitution: Montana State University , Partneraddress: Bozeman, Montana, USA }, number = 5, page = {3695-3715}, title = {A revised model for microbially induced calcite precipitation: Improvements and new insights based on recent experiments}, volume = 51, year = 2015 }
85. 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
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  BibTeX
  @article{NULL, author = {Rybak, Iryna and Magiera, Jim and Helmig, Rainer and Rohde, Christian}, doi = {10.1007/s10596-015-9469-8}, journal = {Computational Geosciences}, month = {02}, note = {, IWS2ID=2990 , Partnerinstitution: Institut für Angewandte Analysis und Numerische Simulation }, title = {Multirate time integration for coupled saturated/unsaturated porous medium and free flow systems}, year = 2015 }
86. 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
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  BibTeX
  @article{NULL, author = {Schwenck, Nicolas and Flemisch, Bernd and Helmig, Rainer and Wohlmuth, Barbara I.}, doi = {10.1007/s10596-015-9536-1}, journal = {Computational Geosciences}, month = {09}, note = {, IWS2ID=3141 , Partnerinstitution: Lehrstuhl für Numerische Mathematik , Partneraddress: München }, number = 6, page = {1219-1230}, title = {Dimensionally reduced flow models in fractured porous media: crossings and boundaries}, url = {http://link.springer.com/article/10.1007/s10596-015-9536-1}, volume = 19, year = 2015 }
  Link
  http://link.springer.com/article/10.1007/s10596-015-9536-1
87. 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.
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  BibTeX
  @article{NULL, author = {Nuske, Philipp and Ronneberger, Olaf and Karadimitriou, Nikos and Helmig, Rainer and Hassanizadeh, S. Majid}, journal = {International Journal of Heat and Mass Transfer}, month = {10}, note = {, IWS2ID=2995 }, page = {822-835}, title = {Modelling Multi-Phase Flow in a Micro-Model with Local Thermal Non-Equilibrium on the Darcy Scale}, volume = 88, year = 2015 }
88. 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
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  BibTeX
  @article{NULL, author = {Faigle, Benjamin and Elfeel, Mohamed Ahmed and Helmig, Rainer and Becker, Beatrix and Flemisch, Bernd and Geiger, Sebastian}, doi = {10.1016/j.cma.2014.11.030}, journal = {Computational Methods in Applied Mechanical Engineering}, month = {12}, note = {, IWS2ID=3025 }, page = {16-34}, title = {Multi-physics modeling of non-isothermal compositional flow on adaptive grids}, url = {http://www.sciencedirect.com/science/article/pii/S0045782514004630}, volume = 292, year = 2015 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0045782514004630
89. 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
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  @article{NULL, author = {Tatomir, Alexandru and Schaffer, Mario and Kissinger, Alexander and Hommel, Johannes and Nuske, Philipp and Licha, Tobias and Helmig, Rainer and Sauter, Martin}, doi = {10.1016/j.ijggc.2014.11.020}, journal = {International Journal of Greenhouse Gas Control}, month = {12}, note = {, IWS2ID=3013 }, page = {145-153}, title = {Novel approach for modeling kinetic interface-sensitive (KIS) tracers with respect to time-dependent interfacial area change for the optimization of supercritical carbon dioxide injection into deep saline aquifers}, volume = 33, year = 2015 }
90. 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.
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  BibTeX
  @article{NULL, author = {Lindner, Franz and Nuske, Philipp and Helmig, Rainer and Mundt, Christian and Pfitzner, Michael}, journal = {Journal of Porous Media}, month = {04}, note = {accepted, IWS2ID=2927 }, title = {Transpiration Cooling with Local Thermal Non-Equilibrium: Model Comparison in Multiphase Flow in Porous Media}, year = 2014 }
91. 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
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  BibTeX
  @article{NULL, author = {Schmid, Karen Sophie and Groß, Joachim and Helmig, Rainer}, doi = {10.1002/2013WR013848}, journal = {Water Resources Research}, month = {01}, note = {, IWS2ID=2906 }, title = {Chemical osmosis in two-phase flow and salinity-dependent capillary pressures in rocks with microporosity}, year = 2014 }
92. 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
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  BibTeX
  @article{NULL, author = {Mosthaf, Klaus and Helmig, Rainer and Or, Dani}, doi = {10.1002/2013WR014442}, journal = {Water Resources Research}, month = {01}, note = {, IWS2ID=2858 }, page = {01--21}, title = {Modeling and analysis of evaporation processes from porous media on the REV scale }, volume = 50, year = 2014 }
93. 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
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  - Link
  BibTeX
  @article{NULL, author = {Faigle, Benjamin and Helmig, Rainer and Aavatsmark, Ivar and Flemisch, Bernd}, doi = {10.1007/s10596-014-9407-1}, journal = {Computational Geosciences}, month = {03}, note = {, IWS2ID=2893 }, number = 5, page = {625-636}, title = {Efficient multiphysics modelling with adaptive grid-refinement using an MPFA method}, url = {http://link.springer.com/article/10.1007/s10596-014-9407-1}, volume = 18, year = 2014 }
  Link
  http://link.springer.com/article/10.1007/s10596-014-9407-1
94. 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
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  BibTeX
  @article{NULL, author = {Nuske, Philipp and Joekar-Niasar, Vahid and Helmig, Rainer}, doi = {10.1016/j.ijheatmasstransfer.2014.03.011}, journal = {International Journal of Heat and Mass Transfer}, month = {05}, note = {, IWS2ID=2829 }, title = {Non-Equilibrium in Multiphase Multicomponent Flow in Porous Media: An Evaporation Example}, year = 2014 }
95. 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
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  BibTeX
  @article{NULL, author = {Karadimitriou, Nikos and Nuske, Philipp and Kleingeld, Pieter and Hassanizadeh, S. Majid and Helmig, Rainer}, doi = {10.1039/c4lc00321g}, month = {03}, note = {, IWS2ID=2929 , Partnerinstitution: University of Utrecht }, title = {Simultaneous thermal and optical imaging of two-phase flow in a micro-model}, year = 2014 }
96. 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
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  BibTeX
  @article{NULL, author = {Szymkiewicz, Adam and Neuweiler, Insa and Helmig, Rainer}, doi = {10.2478/s11600-014-0224-7}, journal = {Computers in Biology and Medicine}, month = {10}, note = {, IWS2ID=2987 , Partnerinstitution: Gdansk University of Technology , Partneraddress: Leibniz Universität Hannover }, page = {1179-1191}, title = {Influence of heterogeneous air entry pressure on large scale unsaturated flow in porous media}, volume = 62, year = 2014 }
97. 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
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  BibTeX
  @article{NULL, author = {Kissinger, Alexander and Helmig, Rainer and Ebigbo, Anozie and Class, Holger and Lange, Torsten and Sauter, Martin and Heitfeld, Michael and Klünker, Johannes and Jahnke, Wiebke}, doi = {10.1007/s12665-013-2578-6}, journal = {Environmental Earth Sciences}, month = {06}, note = {, IWS2ID=2846 }, title = {Hydraulic fracturing in unconventional gas reservoirs: risks in the geological system, part 2}, year = 2013 }
98. 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
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  - Link
  BibTeX
  @article{NULL, author = {Helmig, Rainer and Flemisch, Bernd and Wolff, Markus and Ebigbo, Anozie and Class, Holger}, doi = {10.1016/j.advwatres.2012.07.003}, journal = {Advances in Water Resources}, month = {07}, note = {, IWS2ID=2774 }, page = {52-66}, title = {Model coupling for multiphase flow in porous media}, url = {http://www.sciencedirect.com/science/article/pii/S0309170812001911}, volume = 51, year = 2013 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0309170812001911
99. 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
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  BibTeX
  @article{Hommel2013a, author = {Hommel, Johannes and Cunningham, Alfred B. and Helmig, Rainer and Ebigbo, Anozie and Class, Holger}, doi = {10.1016/j.egypro.2013.08.045}, journal = {Energy Procedia}, month = {08}, note = {, date=09.04.2013, IWS2ID=2881 , Institution: European Geosciences Union }, page = {392-397}, title = {Numerical Investigation of Microbially Induced Calcite Precipitation as a Leakage Mitigation Technology}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2013/Hommel2013_EnergyProcedia.pdf}, volume = {40,2013}, year = 2013 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/2013/Hommel2013_EnergyProcedia.pdf
100. Köppl, T., Wohlmuth, B. I., & Helmig, R. (2013). Reduced one-dimensional modelling and numerical simulation for mass transport in fluids. International Journal for Numerical Methods in Fluids, 72. https://doi.org/10.1002/fld.3728
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  BibTeX
  @article{NULL, author = {Köppl, Tobias and Wohlmuth, Barbara I. and Helmig, Rainer}, doi = {10.1002/fld.3728}, journal = {International Journal for Numerical Methods in Fluids}, month = {03}, note = {, IWS2ID=2718 , Partnerinstitution: Lehrstuhl für Numerische Mathematik }, page = {135-156}, title = {Reduced one-dimensional modelling and numerical simulation for mass transport in fluids}, volume = 72, year = 2013 }
101. 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
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  - Link
  BibTeX
  @article{NULL, author = {Wolff, Markus and Flemisch, Bernd and Helmig, Rainer}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2833 }, number = 12, page = {8139-8159}, title = {An adaptive multi-scale approach for modeling two-phase flow in porous media including capillary pressure}, url = {https://onlinelibrary.wiley.com/doi/10.1002/2013WR013800/full}, volume = 49, year = 2013 }
  Link
  https://onlinelibrary.wiley.com/doi/10.1002/2013WR013800/full
102. Lange, T., Sauter, M., Heitfeld, M., Schetelig, K., Brosig, K., Jahnke, W., Kissinger, A., Helmig, R., Ebigbo, A., & Class, H. (2013). Hydraulic fracturing in unconventional gas reservoirs: risks in the geological system, part 1. Environmental Earth Sciences. https://doi.org/10.1007/s12665-013-2803-3
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  BibTeX
  @article{NULL, author = {Lange, Torsten and Sauter, Martin and Heitfeld, Michael and Schetelig, Kurt and Brosig, Karolin and Jahnke, Wiebke and Kissinger, Alexander and Helmig, Rainer and Ebigbo, Anozie and Class, Holger}, doi = {10.1007/s12665-013-2803-3}, journal = {Environmental Earth Sciences}, month = {10}, note = {, IWS2ID=2882 }, title = {Hydraulic fracturing in unconventional gas reservoirs: risks in the geological system, part 1}, year = 2013 }
103. 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.
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  BibTeX
  @article{NULL, author = {Stoverud, Karen H. and Darcis, Melanie and Helmig, Rainer and Hassanizadeh, S. Majid}, journal = {Transport in Porous Media}, month = {12}, note = {, IWS2ID=2616 }, number = 1, page = {119-143}, title = {Modeling concentration distribution and deformation during convection-enhanced drug delivery into brain tissue}, volume = 92, year = 2012 }
104. 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
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  - Link
  BibTeX
  @article{NULL, author = {Wolff, Markus and Flemisch, Bernd and Helmig, Rainer and Aavatsmark, Ivar}, journal = {International Journal of Numerical Analysis & Modeling}, month = {12}, note = {, IWS2ID=2601 , Partnerinstitution: University of Bergen, CIPR }, number = 3, page = {725-744}, title = {Treatment of tensorial relative permeabilities with multipoint flux approximation}, url = {https://www.math.ualberta.ca/ijnam/Volume-9-2012/No-3-12/2012-03-14.pdf}, volume = 9, year = 2012 }
  Link
  https://www.math.ualberta.ca/ijnam/Volume-9-2012/No-3-12/2012-03-14.pdf
105. 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
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  BibTeX
  @article{NULL, author = {Erbertseder, Karin and Reichold, Johannes and Helmig, Rainer and Jenny, Patrick and Flemisch, Bernd}, journal = {PloS ONE (Public Library of Science Online Journal)}, month = {12}, note = {, IWS2ID=2588 , Institution: , Address: , Partnerinstitution: Institute of Fluid Dynamics, ETH , Partneraddress: Zürich, Schweiz }, number = 3, page = {e31966}, title = {A coupled discrete / continuum model for describing cancer therapeutic transport in the lung}, url = {https://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0031966}, volume = 7, year = 2012 }
  Link
  https://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0031966
106. Jackson, A. S., Rybak, I., Helmig, R., Gray, W. G., & Miller, C. T. (2012). Thermodynamically constrained averaging theory approach for modeling flow and transport phenomena in porous medium systems: 9. Transition region model. Advances in Water Resources, 42. https://doi.org/10.1016/j.advwatres.2012.01.006
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  BibTeX
  @article{NULL, author = {Jackson, A. S. and Rybak, Iryna and Helmig, Rainer and Gray, William G. and Miller, Cass T.}, doi = {10.1016/j.advwatres.2012.01.006}, journal = {Advances in Water Resources}, month = {01}, note = {, IWS2ID=2707 , Partnerinstitution: Institut für Angewandte Analysis und Numerische Simulation und University of North Carolina , Partneraddress: Stuttgart und Chapel Hill, USA }, page = {71-90}, title = {Thermodynamically constrained averaging theory approach for modeling flow and transport phenomena in porous medium systems: 9. Transition region model}, volume = 42, year = 2012 }
107. Sauter, M., Helmig, R., & Klünker, J. (2012). Risiken im Geologischen System bei der Fracking-Technologie: Abschätzung der Auswirkungen auf Grundwasservorkmmen. Wasser und Abfall, Boden, Altlasten, Umweltschutz, 14.
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  BibTeX
  @article{NULL, author = {Sauter, Martin and Helmig, Rainer and Klünker, Johannes}, journal = {Wasser und Abfall, Boden, Altlasten, Umweltschutz}, month = {06}, note = {, IWS2ID=2793 }, title = {Risiken im Geologischen System bei der Fracking-Technologie: Abschätzung der Auswirkungen auf Grundwasservorkmmen}, volume = 14, year = 2012 }
108. 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
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  BibTeX
  @article{NULL, author = {Richter, Thomas and Rudlof, Stephan and Adjibadji, Bankole and Bernlöhr, Heiko and Grüninger, Christoph and Munz, Claus-Dieter and Stock, Andreas and Rohde, Christian and Helmig, Rainer}, doi = {10.1108/17415651211284039}, journal = {Interactive Technology and Smart Education}, month = {09}, note = {, IWS2ID=2771 }, number = 4, page = {246-262}, title = {ViPLab - A Virtual Programming Laboratory for Mathematics and Engineering}, volume = 9, year = 2012 }
109. 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.
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  BibTeX
  @article{NULL, author = {Drewes, Jürgen and Geist, Jürgen and Hegerl, Gabriele and Helmig, Rainer and Huber, Hans and Jekel, Martin and Keller, Jurg and Kinzelbach, Wolfgang and Kögel-Knabner, Ingrid and Liebl, Wolfgang and Manhard, Michael and Mauser, Wolfram and Meckenstock, Rainer and Menzel, Annette and Mok, Bill and Nießner, Reinhard and Rutschmann, Peter and Schmidt, Torsten and Wegener, Joachim and Werner, Inge and Wilderer, Peter}, journal = {Korrespondenz Abwasser}, month = {10}, note = {, IWS2ID=2776 }, page = {907-911}, title = {Integrierter Ansatz zur Wasserforschung und Technologieentwicklung }, volume = 59, year = 2012 }
110. 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
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  BibTeX
  @article{NULL, author = {Baber, Katherina and Mosthaf, Klaus and Flemisch, Bernd and Helmig, Rainer and Müthing, Steffen and Wohlmuth, Barbara I.}, doi = {10.1093/imamat/hxs048}, journal = {IMA Journal of Applied Mathematics}, month = {12}, note = {, IWS2ID=2618 , Partnerinstitution: Institut für Visualisierung und Interaktive Systeme , Partneraddress: Universität Stuttgart }, page = {887-909}, title = {Numerical scheme for coupling two-phase compositional porous-media flow and one-phase compositional free flow}, url = {http://imamat.oxfordjournals.org/content/77/6/887.abstract}, volume = 77, year = 2012 }
  Link
  http://imamat.oxfordjournals.org/content/77/6/887.abstract
111. 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
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  - Link
  BibTeX
  @article{NULL, author = {Enzenhöfer, Rainer and Nowak, Wolfgang and Helmig, Rainer}, doi = {10.1016/j.advatres.2011.04.018}, journal = {Advances in Water Resources}, month = {01}, note = {, IWS2ID=2557 }, page = {121-132}, title = {Probabilistic exposure risk assessment with advective-dispersive well vulnerability criteria}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/vortraege//ADWR_2010_Enzenhofer_online_vers.pdf}, volume = 36, year = 2012 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/vortraege//ADWR_2010_Enzenhofer_online_vers.pdf
112. 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
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  BibTeX
  @article{NULL, author = {Kuhlmann, Anna and Neuweiler, Insa and van der Zee, S.E.A.T.M. and Helmig, Rainer}, doi = {10.1029/2011WR010651}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2652 }, number = 2, title = {Influence of soil structure and root water uptake strategy on steady state unsaturated flow in heterogeneous media}, volume = 48, year = 2012 }
113. 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
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  BibTeX
  @article{NULL, author = {Flemisch, Bernd and Darcis, Melanie and Erbertseder, Karin and Faigle, Benjamin and Lauser, Andreas and Mosthaf, Klaus and Müthing, Steffen and Nuske, Philipp and Tatomir, Alexandru and Wolff, Markus and Helmig, Rainer}, doi = {10.1016/j.advwaters.2011.03.007}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2545 }, number = 9, page = {1102-1112}, title = {DUMUX: DUNE for multi-{phase, component, scale, physics, ...} flow and transport in porous media}, url = {http://www.sciencedirect.com/science/article/pii/S030917081100056X}, volume = 34, year = 2011 }
  Link
  http://www.sciencedirect.com/science/article/pii/S030917081100056X
114. 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
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  BibTeX
  @article{NULL, author = {Oladyshkin, Sergey and Class, Holger and Helmig, Rainer and Nowak, Wolfgang}, doi = {10.1016/j.advwatres.2011.08.005}, journal = {Advances in Water Resources}, month = {00}, note = {, IWS2ID=2559 }, page = {1508-1518}, title = {A concept for data-driven uncertainty quantification and its application to carbon dioxide storage in geological formations}, volume = 34, year = 2011 }
115. 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
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  BibTeX
  @article{NULL, author = {Lauser, Andreas and Hager, Corinna and Helmig, Rainer and Wohlmuth, Barbara I.}, doi = {10.1016, j.advwaters.2011.04.021}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2530 , Partnerinstitution: Institut für Angewandte Analysis und Numerische Simulation , Partneraddress: Universität Stuttgart }, number = 8, page = {957-966}, title = {A new approach for phase transitions in miscible multi-phase flow in porous media}, volume = 34, year = 2011 }
116. 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
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  BibTeX
  @article{NULL, author = {Cao, Yufei and Helmig, Rainer and Wohlmuth, Barbara I.}, doi = {10.1016/j.advwatres.2011.07.002}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2632 , Partnerinstitution: Lehrstuhl für Numerische Mathematik }, number = 12, page = {1581-1596}, title = {A two-scale operator-splitting method for two-phase flow in porous media}, volume = 34, year = 2011 }
117. 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
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  BibTeX
  @article{NULL, author = {Szymkiewicz, Adam and Helmig, Rainer and Neuweiler, Insa}, doi = {10.1029/2011WR010893}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2642 }, title = {Upscaling unsaturated flow in binary porous media with air entry pressure effects}, volume = 48, year = 2011 }
118. 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
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  BibTeX
  @article{NULL, author = {Fritz, Jochen and Flemisch, Bernd and Helmig, Rainer}, journal = {International Journal of Numerical Analysis & Modeling}, month = {12}, note = {, IWS2ID=2484 }, number = 1, page = {17-28}, title = {Decoupled and multiphysics models for non-isothermal compositional two-phase flow in porous media}, url = {https://www.math.ualberta.ca/ijnam/Volume-9-2012/No-1-12/2012-01-02.pdf}, volume = 9, year = 2011 }
  Link
  https://www.math.ualberta.ca/ijnam/Volume-9-2012/No-1-12/2012-01-02.pdf
119. 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
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  BibTeX
  @article{NULL, author = {Oladyshkin, Sergey and Class, Holger and Helmig, Rainer and Nowak, Wolfgang}, doi = {10.1007/s10596-011-9224-8}, journal = {Computational Geosciences}, month = {12}, note = {, IWS2ID=2503 }, number = 3, page = {565-577}, title = {An integrative approach to robust design and probabilistic risk assessment for CO2 storage in geological formations}, volume = 15, year = 2011 }
120. 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
  - BibTeX
  BibTeX
  @article{NULL, author = {Neuweiler, Insa and Papafotiou, Alexandros and Class, Holger and Helmig, Rainer}, doi = {10.1016/j.jconhyd.2010.08.001}, journal = {Journal of Contaminant Hydrology}, month = {07}, note = {, IWS2ID=2544 , Partnerinstitution: Institut für Strömungsmechanik und Umweltphysik im Bauwesen, Universität Hannover , Partneraddress: Hannover }, number = 1, page = {141-156}, title = {Estimation of effective parameters for a two-phase flow problem in non-Gaussian heterogeneous porous media}, volume = {120-121}, year = 2011 }
121. 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.
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  BibTeX
  @article{NULL, author = {Tatomir, Alexandru and Szymkiewicz, Adam and Class, Holger and Helmig, Rainer}, journal = {Computer Modeling in Engineering & Sciences}, month = {12}, note = {accepted, IWS2ID=2659 , Partnerinstitution: Gdansk University of Technology }, title = {Modeling two phase flow in large scale fractured porous media with an extended multiple interacting continua method}, year = 2011 }
122. 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
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  BibTeX
  @article{NULL, author = {Ahrenholz, Benjamin and Niessner, Jennifer and Helmig, Rainer and Krafczyk, Manfred}, doi = {10.1029/2010WR009519}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2500 , Partnerinstitution: Institut für rechnergestützte Modellierung im Bauingenieurwesen , Partneraddress: Technische Universität Braunschweig }, title = {Pore-scale determination of parameters for macro-scale modeling of evaporation processes in porous media}, volume = 47, year = 2011 }
123. 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
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  BibTeX
  @article{NULL, author = {Cao, Yufei and Helmig, Rainer and Wohlmuth, Barbara I.}, doi = {10.1002/num.20525}, journal = {Numerical Methods for Partial Differential Equations}, month = {12}, note = {, IWS2ID=2502 , Partnerinstitution: Institut für Angewandte Analysis und Numerische Simulation , Partneraddress: Universität Stuttgart }, number = 2, page = {329-350}, title = {Convergence of the multipoint flux approximation L-method for homogeneous media on uniform grids}, volume = 27, year = 2011 }
124. 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
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  BibTeX
  @article{NULL, author = {Szymkiewicz, Adam and Helmig, Rainer}, doi = {10.1016/j.advwatres.2011.05.011}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2617 , Partnerinstitution: Gdansk University of Technology , Partneraddress: Gdansk }, number = 8, page = {1012-1025}, title = {Comparison of conductivity averaging methods for one-dimensional unsaturated flow in layered soils}, volume = 34, year = 2011 }
125. 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
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  - Link
  BibTeX
  @article{NULL, author = {Darcis, Melanie and Class, Holger and Flemisch, Bernd and Helmig, Rainer}, doi = {10.2516/ogst/2010037}, journal = {Oil & Gas Science and Technology-Revue de l'IFP}, month = {12}, note = {, IWS2ID=2558 }, number = 1, page = {93-103}, title = {Sequential model coupling for feasibility studies of CO2 storage in deep saline aquifers}, url = {http://ogst.ifpenergiesnouvelles.fr/index.php?option=com_article&access=doi&doi=10.2516/ogst/2010037&Itemid=129}, volume = 66, year = 2011 }
  Link
  http://ogst.ifpenergiesnouvelles.fr/index.php?option=com_article&access=doi&doi=10.2516/ogst/2010037&Itemid=129
126. Mosthaf, K., Baber, K., Flemisch, B., Helmig, R., Leijnse, T., Rybak, I., & Wohlmuth, B. I. (2011). A coupling concept for two-phase compositional porous-medium and single-phase compositional free flow. Water Resources Research, 47. https://onlinelibrary.wiley.com/doi/10.1029/2011WR010685/abstract
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Mosthaf, Klaus and Baber, Katherina and Flemisch, Bernd and Helmig, Rainer and Leijnse, Toon and Rybak, Iryna and Wohlmuth, Barbara I.}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2589 }, page = {W10522}, title = {A coupling concept for two-phase compositional porous-medium and single-phase compositional free flow}, url = {https://onlinelibrary.wiley.com/doi/10.1029/2011WR010685/abstract}, volume = 47, year = 2011 }
  Link
  https://onlinelibrary.wiley.com/doi/10.1029/2011WR010685/abstract
127. Walter, L., Oladyshkin, S., Class, H., Darcis, M., & Helmig, R. (2011). A study on pressure evolution in a sand channel system during CO2 injection. Energy Procedia, 4.
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  BibTeX
  @article{NULL, author = {Walter, Lena and Oladyshkin, Sergey and Class, Holger and Darcis, Melanie and Helmig, Rainer}, journal = {Energy Procedia}, month = {06}, note = {, IWS2ID=2875 }, page = {3722-3729}, title = {A study on pressure evolution in a sand channel system during CO2 injection}, volume = 4, year = 2011 }
128. 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
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  BibTeX
  @article{NULL, author = {Szymkiewicz, Adam and Helmig, Rainer and Kuhnke, Hartmut}, doi = {10.1007/s11242-010-9604-x}, journal = {Transport in Porous Media}, month = {05}, note = {, IWS2ID=2521 , Partnerinstitution: Gdansk University of Technology }, number = 1, page = {27-47}, title = {Two phase flow in heterogeneous porous media with non-wetting phase trapping}, volume = 86, year = 2011 }
129. van Noorden, T. L., Pop, I. S., Ebigbo, A., & Helmig, R. (2010). An upscaled model for biofilm growth in a thin strip. Water Resources Research, 46. https://doi.org/10.1029/2009WR008217
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  BibTeX
  @article{NULL, author = {van Noorden, Tycho L. and Pop, Iuliu Sorin and Ebigbo, Anozie and Helmig, Rainer}, doi = {10.1029/2009WR008217}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2492 }, page = {W06505}, title = {An upscaled model for biofilm growth in a thin strip}, volume = 46, year = 2010 }
130. 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
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  BibTeX
  @article{NULL, author = {Papafotiou, Alexandros and Sheta, Hussam and Helmig, Rainer}, doi = {10.1007/s10596-009-9151-0}, journal = {Computational Geosciences}, month = {12}, note = {, IWS2ID=2471 , Partnerinstitution: Institut für Strömungsmechanik und Umweltphysik im Bauwesen, Universität Hannover , Partneraddress: Hannover }, number = 2, page = {273-287}, title = {Numerical modeling of two-phase hysteresis combined with an interface condition for heterogeneous porous media}, volume = 14, year = 2010 }
131. 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
  - BibTeX
  BibTeX
  @article{NULL, author = {Kopp, Andreas and Binning, Philip J. and Johannsen, Klaus and Helmig, Rainer and Class, Holger}, doi = {10.1016/j.advwatres.2010.05.001}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2437 }, number = 8, page = {867-879}, title = {A contribution to risk analysis for leakage through abandoned wells in geological CO2 storage}, volume = 33, year = 2010 }
132. 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
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  BibTeX
  @article{NULL, author = {Ochs, Steffen Oliver and Class, Holger and Färber, Arne and Helmig, Rainer}, doi = {10.1029/2007WR006401}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2501 }, page = {W05520}, title = {Methods for predicting the spreading of steam below the water table during subsurface remediation}, volume = 46, year = 2010 }
133. 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
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  BibTeX
  @article{NULL, author = {Skjælaaen, Inge and Ebigbo, Anozie and Espedal, Magne and Helmig, Rainer}, doi = {10.1007/s00791-010-0143-3}, journal = {Computing and Visualization in Science}, month = {12}, note = {, IWS2ID=2548 }, number = 6, page = {265-273}, title = {A model for transport of hydrogen sulfide in oil- and water-saturated porous media}, volume = 13, year = 2010 }
134. 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
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  BibTeX
  @article{NULL, author = {Nuske, Philipp and Faigle, Benjamin and Helmig, Rainer and Niessner, Jennifer and Neuweiler, Insa}, doi = {10.1029/2009WR008076}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2554 , Partnerinstitution: Institut für Strömungsmechanik und Umweltphysik im Bauwesen, Universität Hannover }, page = {W09528}, title = {Modeling gas-water processes in fractures with fracture flow properties obtained through upscaling}, volume = 46, year = 2010 }
135. 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
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  BibTeX
  @article{NULL, author = {Troldborg, Mads and Nowak, Wolfgang and Tuxen, Nina and Bjerg, Poul L. and Helmig, Rainer and Binning, Philip J.}, doi = {10.1029/2010WR009227}, journal = {Water Resources Research}, month = {12}, note = {, IWS2ID=2549 , Partnerinstitution: Dept. of Environmental Engineering, TU Denmark, 2800 Kgs. Lyngby; Orbicon A/S, Roskilde , Partneraddress: Denmark }, number = {W12552}, title = {Uncertainty evaluation of mass discharge estimates from a contaminated site using a fully Bayesian framework}, volume = 46, year = 2010 }
136. 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
  - BibTeX
  BibTeX
  @article{NULL, author = {Ebigbo, Anozie and Helmig, Rainer and Cunningham, Alfred B. and Class, Holger and Gerlach, Robin}, doi = {10.1016/j.advwatres.2010.04.004}, journal = {Advances in Water Resources}, month = {00}, note = {, IWS2ID=2520 }, number = 7, page = {762-781}, title = {Modelling biofilm growth in the presence of carbon dioxide and water flow in the subsurface}, volume = 33, year = 2010 }
137. 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
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  BibTeX
  @article{NULL, author = {Helmig, Rainer and Weiss, Alexander and Wohlmuth, Barbara I.}, doi = {10.1007/s10596-008-9125-7}, journal = {Computational Geosciences}, month = {12}, note = {, IWS2ID=2450 , Partnerinstitution: Institut für Angewandte Analysis und Numerische Simulation , Partneraddress: Universität Stuttgart }, number = 3, page = {373-389}, title = {Variational inequalities for modeling flow in heterogeneous porous media with entry pressure}, volume = 13, year = 2009 }
138. 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
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Class, Holger and Ebigbo, Anozie and Helmig, Rainer and Dahle, Helge K. and Nordbotten, Jan M. and Celia, Michael A. and Audigane, Pascal and Darcis, Melanie and Ennis-King, Jonathan and Fan, Yaqing and Flemisch, Bernd and Gasda, Sarah E. and Jin, Min and Krug, Stefanie and Labregere, Diane and Naderi Beni, Ali and Pawar, Rajesh J. and Sbai, Adil and Thomas, Sunil G. and Trenty, Laurent and Wei, Lingli}, doi = {10.1007/s10596-009-9146-x}, journal = {Computational Geosciences}, month = {12}, note = {, IWS2ID=2473 }, number = 4, page = {409-434}, title = {A benchmark study on problems related to CO2 storage in geologic formations: Summary and discussion of the results}, url = {https://link.springer.com/article/10.1007%2Fs10596-009-9146-x?LI=true}, volume = 13, year = 2009 }
  Link
  https://link.springer.com/article/10.1007%2Fs10596-009-9146-x?LI=true
139. 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.
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  BibTeX
  @article{NULL, author = {Kopp, Andreas and Ebigbo, Anozie and Bielinski, Andreas and Class, Holger and Helmig, Rainer}, booktitle = {Carbon dioxide sequestration in geological media - State of the science}, editor = {Grobe, M. and Pashin, J. C. and Dodge, R. L.}, month = {12}, note = {, IWS2ID=2101 , Address: Edmonton, USA }, number = 59, page = {439-456}, title = {Numerical simulation of temperature changes caused by CO2 injection in geological reservoirs}, year = 2009 }
140. 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
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  - Link
  BibTeX
  @article{NULL, author = {Kopp, Andreas and Class, Holger and Helmig, Rainer}, doi = {10.1016/j.ijggc.2008.10.002}, journal = {International Journal of Greenhouse Gas Control}, month = {12}, note = {, IWS2ID=2384 }, number = 3, page = {263-276}, title = {Investigations on CO2 storage capacity in saline aquifers - Part 1: Dimensional analysis of flow processes and reservoir characteristics}, url = {http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B83WP-4V1MFNV-1-R&_cdi=33792&_user=479010&_orig=search&_coverDate=05%2F31%2F2009&_sk=999969996&view=c&wchp=dGLzVlz-zSkWz&md5=0b150c61434f46d53f6ce05466fa9d31&ie=/sdarticle.pdf}, volume = 3, year = 2009 }
  Link
  http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B83WP-4V1MFNV-1-R&_cdi=33792&_user=479010&_orig=search&_coverDate=05%2F31%2F2009&_sk=999969996&view=c&wchp=dGLzVlz-zSkWz&md5=0b150c61434f46d53f6ce05466fa9d31&ie=/sdarticle.pdf
141. 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
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Kopp, Andreas and Class, Holger and Helmig, Rainer}, doi = {10.1016/j.ijggc.2008.10.001}, journal = {International Journal of Greenhouse Gas Control}, month = {12}, note = {, IWS2ID=2385 }, number = 3, page = {277-287}, title = {Investigations on CO2 storage capacity in saline aquifers - Part 2: Estimation of storage capacity coefficients}, url = {http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B83WP-4V1D7WW-1-F&_cdi=33792&_user=479010&_orig=search&_coverDate=05%2F31%2F2009&_sk=999969996&view=c&wchp=dGLzVlz-zSkWz&md5=0fcbb46a64e634f1c9644b3a3078a21f&ie=/sdarticle.pdf}, volume = 3, year = 2009 }
  Link
  http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B83WP-4V1D7WW-1-F&_cdi=33792&_user=479010&_orig=search&_coverDate=05%2F31%2F2009&_sk=999969996&view=c&wchp=dGLzVlz-zSkWz&md5=0fcbb46a64e634f1c9644b3a3078a21f&ie=/sdarticle.pdf
142. 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
  - BibTeX
  BibTeX
  @article{NULL, author = {Kopp, Andreas and Probst, Peter and Class, Holger and Hurter, Suzanne and Helmig, Rainer}, doi = {10.1016/j.egypro.2009.02.060}, journal = {Energy Procedia}, month = {12}, note = {, IWS2ID=2451 }, number = 1, page = {2863-2870}, title = {Estimation of CO2 storage capacity coefficients in geologic formations}, volume = 1, year = 2009 }
143. Class, H., Dahle, H. K., & Helmig, R. (2009). Preface (to the Special Issue). Computational Geosciences, 13. https://doi.org/10.1007/s10596-009-9160-z
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  BibTeX
  @article{NULL, author = {Class, Holger and Dahle, Helge K. and Helmig, Rainer}, doi = {10.1007/s10596-009-9160-z}, journal = {Computational Geosciences}, month = {12}, note = {, IWS2ID=3077 }, page = {405-407}, title = {Preface (to the Special Issue)}, volume = 13, year = 2009 }
144. 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
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  BibTeX
  @article{NULL, author = {Geiger, Sebastian and Matthäi, Stephan and Niessner, Jennifer and Helmig, Rainer}, doi = {10.2118/107485-PA}, journal = {SPE Journal}, month = {12}, note = {, IWS2ID=2112 }, number = 2, page = {338-354}, title = {Black-oil simulations for three-component - three-phase flow in fractured porous media}, volume = 14, year = 2009 }
145. 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
  - BibTeX
  BibTeX
  @article{Freiboth/etal, author = {Freiboth, Sandra and Class, Holger and Helmig, Rainer and Graf, Tobias and Ehlers, Wolfgang and Schwarz, Viktoria and Vrettos, Christos}, doi = {10.1007/s10596-008-9118-6}, month = {12}, note = {, IWS2ID=2224 , Partnerinstitution: Institut für Mechanik (Bauwesen) , Partneraddress: Universität Stuttgart }, number = 3, page = {281-300}, publisher = {Computational Geosciences}, title = {A model for multiphase flow and transport in porous media including a phenomenological approach to account for deformation - a model concept and its validation within a code intercomparison study}, volume = 13, year = 2009 }
146. 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
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  BibTeX
  @article{NULL, author = {Cao, Yufei and Helmig, Rainer and Wohlmuth, Barbara I.}, doi = {10.1002/fld.1926}, journal = {International Journal for Numerical Methods in Fluids}, month = {12}, note = {, IWS2ID=2379 }, number = 11, page = {1173-1199}, title = {Geometrical interpretation of the multipoint flux approximation L-method}, volume = 60, year = 2009 }
147. 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
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  BibTeX
  @article{NULL, author = {Niessner, Jennifer and Helmig, Rainer}, doi = {10.1016/j.advwatres.2009.02.007}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2430 }, number = 6, page = {845-850}, title = {Multi-physics modeling of flow and transport in porous media using a downscaling approach}, volume = 32, year = 2009 }
148. 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
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  BibTeX
  @article{NULL, author = {Dogan, Mehmet Onur and Class, Holger and Helmig, Rainer}, doi = {10.3970/cmes.2009.053.207}, journal = {Computer Modeling in Engineering & Sciences}, month = {00}, note = {, IWS2ID=2513 }, number = 3, page = {207-233}, title = {Different concepts for the coupling of porous-media flow with lower-dimensional pipe flow}, volume = 53, year = 2009 }
149. Haegland, H., Assteerawatt, A., Dahle, H. K., Eigestad, G. T., & Helmig, R. (2009). Comparison of cell- and vertex-centered discretization methods for flow in a two-dimensional discrete-fracture-matrix system. Advances in Water Resources, 32.
  - BibTeX
  BibTeX
  @article{NULL, author = {Haegland, Hakonh and Assteerawatt, Anongnart and Dahle, Helge K. and Eigestad, G. T. and Helmig, Rainer}, journal = {Advances in Water Resources}, month = {10}, note = {, IWS2ID=2713 , Partnerinstitution: RMS, London; Department of Mathematics and CIPR, University of Bergen; Perecon AS, Bergen , Partneraddress: }, page = {1740-1755}, title = {Comparison of cell- and vertex-centered discretization methods for flow in a two-dimensional discrete-fracture-matrix system}, volume = 32, year = 2009 }
150. 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
  - BibTeX
  - Link
  BibTeX
  @article{NULL, author = {Papafotiou, Alexandros and Helmig, Rainer and Schaap, Joris and Lehmann, Peter and Kaestner, Anders and Flühler, Hannes and Neuweiler, Insa and Hassanein, Rene and Ahrenholz, Benjamin and Tölke, Jonas and Peters, Andre and Durner, Wolfgang}, doi = {10.1016/j.advwatres.2007.09.006}, journal = {Advances in Water Resources}, month = {09}, note = {, IWS2ID=2148 }, number = 9, page = {1253-1268}, title = {From the pore scale to the lab scale: 3D lab experiment and numerical simulation of drainage in heterogeneous porous media}, url = {http://dx.doi.org/10.1016/j.advwatres.2007.09.006}, volume = 31, year = 2008 }
  Link
  http://dx.doi.org/10.1016/j.advwatres.2007.09.006
151. 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
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  BibTeX
  @article{NULL, author = {Class, Holger and Helmig, Rainer and Neuweiler, Insa}, doi = {10.2136/vzj2007.0056}, journal = {Vadose Zone Journal}, month = {12}, note = {, IWS2ID=2195 }, number = 2, page = {721-731}, title = {Sequential coupling of models for contaminant spreading in the vadose zone}, volume = 7, year = 2008 }
152. 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
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  BibTeX
  @article{NULL, author = {Manthey, Sabine and Hassanizadeh, S. Majid and Helmig, Rainer and Hilfer, Rudolf}, doi = {10.1016/j.advwatres.2008.01.021}, journal = {Advances in Water Resources}, month = {09}, note = {, IWS2ID=2423 }, number = 9, page = {1137-1150}, title = {Dimensional analysis of two-phase flow including a rate-dependent capillary pressure-saturation relationship}, url = {http://dx.doi.org/10.1016/j.advwatres.2008.01.021}, volume = 31, year = 2008 }
  Link
  http://dx.doi.org/10.1016/j.advwatres.2008.01.021
153. 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
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  @article{NULL, author = {Vasin, Milos and Lehmann, Peter and Kaestner, Anders and Hassanein, Rene and Nowak, Wolfgang and Helmig, Rainer and Neuweiler, Insa}, doi = {10.1016/j.advwatres.2008.01.004}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2433 }, number = 9, page = {1205-1220}, title = {Drainage in heterogeneous sand columns with different geometric structures}, volume = 31, year = 2008 }
154. Eder, M., Kobus, H., & Helmig, R. (2008). Dreidimensionale Modellierung der Hydrodynamik im Bodensee. Wasserwirtschaft, 98,1.
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  @article{NULL, author = {Eder, Magdalena and Kobus, Helmut and Helmig, Rainer}, journal = {Wasserwirtschaft}, month = {12}, note = {, IWS2ID=2387 }, page = {16-21}, title = {Dreidimensionale Modellierung der Hydrodynamik im Bodensee}, volume = {98,1}, year = 2008 }
155. 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
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  @article{NULL, author = {Niessner, Jennifer and Helmig, Rainer}, doi = {10.1016/j.advwatres.2007.05.008}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2015 }, number = 11, page = {2309-2325}, title = {Multi-scale modeling of three-phase--three-component processes in heterogeneous porous media}, volume = 30, year = 2007 }
156. 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
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  @article{NULL, author = {Helmig, Rainer and Weiss, Alexander and Wohlmuth, Barbara I.}, doi = {10.1007/s10596-007-9050-1}, month = {12}, note = {, IWS2ID=2142 }, number = 3, page = {261-274}, publisher = {Computational Geosciences}, title = {Dynamic capillary effects in heterogeneous porous media}, volume = 11, year = 2007 }
157. 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.
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  @article{NULL, author = {Kobayashi, Kenichiro and Hinkelmann, Reinhard and Helmig, Rainer and Takara, Kaoru and Tamai, Nobuyuki}, month = {05}, note = {Journal of Hydraulic, Coastal and Environmental Engineering, IWS2ID=2103 }, number = 2, page = {120-133}, publisher = {Japan Society of Civil Engineers, Doboku Gakkai Ronbunshuu B}, title = {A numerical experiment with two-phase and two-phase/three-component models for the methane migration in the subsurface aquifer}, volume = 63, year = 2007 }
158. 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
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  BibTeX
  @article{NULL, author = {Ebigbo, Anozie and Class, Holger and Helmig, Rainer}, doi = {10.1007/s10596-006-9033-7}, month = {12}, note = {, IWS2ID=1966 }, number = 2, page = {103-115}, publisher = {Computational Geosciences}, title = {CO2 leakage through an abandoned well: Problem-oriented benchmarks}, url = {http://dx.doi.org/10.1007/s10596-006-9033-7}, volume = 11, year = 2007 }
  Link
  http://dx.doi.org/10.1007/s10596-006-9033-7
159. 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
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  @article{NULL, author = {van Duijn, Cornelis Johannes and Eichel, Hartmut and Helmig, Rainer and Pop, Iuliu Sorin}, doi = {10.1007/s11242-006-9089-9}, journal = {Transport in Porous Media}, month = {12}, note = {, IWS2ID=2141 }, number = 3, page = {411-428}, title = {Effective equations for two-phase flow in porous media: the effect of trapping on the microscale}, volume = 69, year = 2007 }
160. 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
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  @article{NULL, author = {Reichenberger, Volker and Jakobs, Hartmut and Bastian, Peter and Helmig, Rainer}, doi = {10.1016/j.advwatres.2005.09.001}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=2447 , Partnerinstitution: Institut für Wissenschaftliches Rechnen , Partneraddress: Heidelberg }, number = 7, page = {1020-1036}, title = {A mixed-dimensional finite volume method for two-phase flow in fractured porous media }, volume = 29, year = 2006 }
161. 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
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  @article{acostaetal:2005, author = {Acosta, Maria and Merten, Clemens and Eigenberger, Gerhart and Class, Holger and Helmig, Rainer and Thoben, Birgit and Müller-Steinhagen, Hans}, doi = {10.1016/j.jpowsour.2005.12.068}, month = {09}, note = {, IWS2ID=1369 }, number = 2, page = {1123-1141}, publisher = {Journal of Power Sources}, title = {Modeling non-isothermal two-phase multicomponent flow in the cathode of PEM fuel cells}, year = 2006 }
162. 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
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  @article{NULL, author = {Niessner, Jennifer and Helmig, Rainer}, booktitle = {Numerical Linear Algebra with Applications}, doi = {10.1002/nla.497}, journal = {Numerical Linear Algebra with Applications}, month = {12}, note = {, IWS2ID=1822 }, number = 9, page = {699-715}, title = {Multi-scale modeling of two-phase - two-component processes in heterogeneous porous media}, volume = 13, year = 2006 }
163. Helmig, R., Sheta, H., Meiners, H., & Kunz, E. (2006). Numerische Simulation von Gasströmen im Grubengebäude und im Gebirge (No. 01_02). 142(01_02), Article 01_02.
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  @article{NULL, author = {Helmig, Rainer and Sheta, Hussam and Meiners, Heribert and Kunz, Erwin}, month = {01}, note = {, IWS2ID=1824 }, number = {01_02}, page = {37-44}, publisher = {Glückauf}, title = {Numerische Simulation von Gasströmen im Grubengebäude und im Gebirge}, volume = 142, year = 2006 }
164. 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.
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  @article{NULL, author = {Helmig, Rainer and Schaap, Joris and Lehmann, Peter and Kaestner, Anders and Flühler, Hannes and Hassanein, Rene}, month = {04}, note = {, IWS2ID=1878 }, title = {Problem identification and sensitivity analysis for a well-controlled 3d lab-scale experiment}, type = 0, year = 2006 }
165. 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.
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  @article{classetal:2006, author = {Class, Holger and Bielinski, Andreas and Helmig, Rainer and Kopp, Andreas and Ebigbo, Anozie}, editor = {{Arlt, W. & Kreysa}, G.}, month = {03}, note = {, IWS2ID=1872 , Address: Weinheim }, number = 4, page = {445-452}, publisher = {Chemie Ingenieur Technik, Wiley-VCH}, title = {Numerische Simulation der Speicherung von CO2 in geologischen Formationen}, volume = 78, year = 2006 }
166. 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
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  @article{NULL, author = {Helmig, Rainer and Niessner, Jennifer and Class, Holger}, doi = {10.1080/00036810600792154}, month = {12}, note = {, IWS2ID=1957 }, number = {03_04}, page = {245-252}, publisher = {International Journal of Computational Fluid Dynamics}, title = {Recent advances in finite element methods for multi-phase flow processes in porous media}, volume = 20, year = 2006 }
167. 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
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  @article{NULL, author = {Niessner, Jennifer and Helmig, Rainer and Jakobs, Hartmut and Roberts, Jean}, doi = {10.1016/j.advwatres.2005.01.006}, editor = {Barry, D.A and Krajewski, W.F. & C.T. Miller}, month = {01}, note = {, IWS2ID=1319 }, number = 7, page = {671-687}, publisher = {Advances in Water Resources}, title = {Interface condition and linearization schemes in the Newton iterations for two-phase flow in heterogeneous porous media}, volume = 28, year = 2005 }
168. Braun, C., Helmig, R., & Manthey, S. (2005). Macro-scale effective constitutive relationships for two-phase flow processes in heterogeneous porous media with emphasis on the relative permeability-saturation-relationship (No. 01_02). 76(01_02), Article 01_02. https://doi.org/10.1016/j.jconhyd.2004.07.009
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  @article{braun2005macroscale, author = {Braun, Christopherus and Helmig, Rainer and Manthey, Sabine}, doi = {10.1016/j.jconhyd.2004.07.009}, month = {01}, note = {, IWS2ID=1283 }, number = {01_02}, page = {47-85}, publisher = {Journal of Contaminant Hydrology}, title = {Macro-scale effective constitutive relationships for two-phase flow processes in heterogeneous porous media with emphasis on the relative permeability-saturation-relationship}, volume = 76, year = 2005 }
169. Manthey, S., Hassanizadeh, S. M., & Helmig, R. (2005). Macro-scale dynamic effects in homogeneous and heterogeneous porous media (No. 01_02). 58(01_02), Article 01_02. https://doi.org/10.1007/s11242-004-5472-6
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  @article{NULL, author = {Manthey, Sabine and Hassanizadeh, S. Majid and Helmig, Rainer}, doi = {10.1007/s11242-004-5472-6}, month = {12}, note = {, IWS2ID=1673 }, number = {01_02}, page = {121-145}, publisher = {Transport in Porous Media}, title = {Macro-scale dynamic effects in homogeneous and heterogeneous porous media}, volume = 58, year = 2005 }
170. 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
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  @article{hilfer2004dimensional, author = {Hilfer, Rudolf and Helmig, Rainer}, doi = {10.1016/j.advwatres.2004.07.003}, month = {10}, note = {, IWS2ID=1205 }, number = 10, page = {1033-1040}, publisher = {Advances in Water Resources}, title = {Dimensional analysis and upscaling of two-phase flow in porous media with piecewise constant heterogeneities }, volume = 27, year = 2004 }
171. 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
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  @article{subhendu:2004, author = {Hazra, Subhendu Bikash and Class, Holger and Helmig, Rainer and Schulz, Volker}, doi = {10.1023/B:COMG.0000024445.39048.21}, month = {12}, note = {, IWS2ID=796 }, number = 1, page = {21-47}, publisher = {Computational Geosciences}, title = {Forward and inverse problems in modeling of multiphase flow and transport through porous media}, volume = 8, year = 2004 }
172. Findikatis, A., Helmig, R., Kitanidis, P. K., Nimmo, J., Pruess, K., Rubin, Y., Stauffer, F., & Tsang, C.-F. (2004). Summary of a panel discussion at the International Groundwater Symposium held onMarch 25-28. 2002 Berkeley, Califorina, USA (No. 03_04). 42(03_04), Article 03_04.
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  @article{findikatis2004summary, author = {Findikatis, Angelos and Helmig, Rainer and Kitanidis, Peter K. and Nimmo, J. and Pruess, Karsten and Rubin, Yoram and Stauffer, Fritz and Tsang, Chin-Fu}, month = {03}, note = {, IWS2ID=1284 }, number = {03_04}, publisher = {Journal of Hydraulic Research}, title = {Summary of a panel discussion at the International Groundwater Symposium held onMarch 25-28. 2002 Berkeley, Califorina, USA}, volume = 42, year = 2004 }
173. Hinkelmann, R., Paul, M., Helmig, R., & Breiting, T. (2004). New media in environmental and water-related engineering education (No. 2). 13(2), Article 2.
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  @article{Hinkelmann:2004a, author = {Hinkelmann, Reinhard and Paul, Maren and Helmig, Rainer and Breiting, Thomas}, month = {12}, note = {Indexed in Chemical Abstracts and AJOL www.ajol.info, ISSN 1019-1593, IWS2ID=645 }, number = 2, publisher = {Botswana Journal of Technology}, title = {New media in environmental and water-related engineering education}, volume = 13, year = 2004 }
174. 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
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  @article{Class:2002b, author = {Class, Holger and Helmig, Rainer}, doi = {10.1016/S0309-1708(02)00015-5}, month = {12}, note = {, IWS2ID=132 }, number = 5, page = {551-564}, publisher = {Advances in Water Resources}, title = {Numerical simulation of nonisothermal multiphase multicomponent processes in porous media - 2. Applications for the injection of steam and air}, volume = 25, year = 2002 }
175. 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
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  @article{Class:2002a, author = {Class, Holger and Helmig, Rainer and Bastian, Peter}, doi = {10.1016/S0309-1708(02)00014-3}, month = {12}, note = {, IWS2ID=131 }, number = 5, page = {533-550}, publisher = {Advances in Water Resources}, title = {Numerical simulation of nonisothermal multiphase multicomponent processes in porous media - 1. An efficient solution technique}, volume = 25, year = 2002 }
176. 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
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  @article{Brevdo:1998, author = {Brevdo, Leonid and Helmig, Rainer and Haragus-Courcelle, Mariana and Kirchgässner, Klaus}, doi = {10.1023/A:1010723604900}, month = {12}, note = {, IWS2ID=76 }, number = 3, page = {507-537}, publisher = {Transport in Porous Media}, title = {Permanent fronts in two-phase flows in a porous medium}, volume = 44, year = 2001 }
177. 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
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  @article{Bastian:1998, author = {Bastian, Peter and Helmig, Rainer}, doi = {10.1016/S0309-1708(99)00014-7}, journal = {Advances in Water Resources}, month = {12}, note = {, IWS2ID=74 , Institution: Sonderforschungsbereich 404, Mehrfeldprobleme in der Kontinuumsmechanik , Address: Universität Stuttgart }, number = 3, page = {199-216}, title = {Efficient fully-coupled solution techniques for two phase flow in porous media. Parallel multigrid solution and large scale computations}, volume = 23, year = 1999 }
178. 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
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  @article{Huber:1999c, author = {Huber, Ralf Uwe and Helmig, Rainer}, doi = {10.1002/(SICI)1097-0363(19990430)29:8<899::AID-FLD715>3.0.CO;2-W}, month = {12}, note = {, IWS2ID=109 }, number = 8, page = {899-920}, publisher = {International Journal for Numerical Methods in Fluids}, title = {Multiphase flow in heterogeneous porous media: A classical finite element method versus an IMPES-based mixed FE/FV approach}, volume = 29, year = 1999 }
179. Schulz, V., Bárdossy, A., & Helmig, R. (1999). Conditional statistical inverse modeling in groundwater flow by multigrid methods (No. 1). 3(1), Article 1.
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  @article{Schulz:1998, author = {Schulz, Volker and Bárdossy, András and Helmig, Rainer}, month = {12}, note = {, IWS2ID=95 }, number = 1, page = {49-68}, publisher = {Computational Geosciences}, title = {Conditional statistical inverse modeling in groundwater flow by multigrid methods}, volume = 3, year = 1999 }
180. 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
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  @article{Cirpka:1999a, author = {Cirpka, Olaf Arie and Frind, Emil O. and Helmig, Rainer}, doi = {10.1016/S0309-1708(98)00050-5}, month = {12}, note = {, IWS2ID=100 }, number = 7, page = {697-710}, publisher = {Advances in Water Resources}, title = {Streamline-oriented grid-generation of transport modelling in two-dimensional domains including wells}, volume = 22, year = 1999 }
181. 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
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  @article{Cirpka:1999c, author = {Cirpka, Olaf Arie and Frind, Emil O. and Helmig, Rainer}, doi = {10.1016/S0169-7722(99)00044-3}, month = {12}, note = {, IWS2ID=102 }, number = 2, page = {159-182}, publisher = {Journal of Contaminant Hydrology}, title = {Numerical simulation of biodegradation controlled by transverse mixing}, volume = 40, year = 1999 }
182. 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
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  @article{Cirpka:1999b, author = {Cirpka, Olaf Arie and Helmig, Rainer and Frind, Emil O.}, doi = {10.1016/S0309-1708(98)00051-7}, month = {12}, note = {, IWS2ID=101 }, number = 7, page = {711-728}, publisher = {Advances in Water Resources}, title = {Numerical methods for reactive transport on rectangular and streamline-oriented grids}, volume = 22, year = 1999 }
183. 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
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  @article{Helmig:1998g, author = {Helmig, Rainer and Huber, Ralf Uwe}, doi = {10.1016/S0309-1708(97)00023-7}, month = {12}, note = {, IWS2ID=80 }, number = 8, page = {697-711}, publisher = {Advances in Water Resources}, title = {Comparison of Galerkin-type discretization techniques for two-phase flow in heterogeneous porous media}, volume = 21, year = 1998 }
184. 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.
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  @article{Helmig:1998c, author = {Helmig, Rainer and Class, Holger and Färber, Arne and Emmert, Martin}, month = {12}, note = {, IWS2ID=83 }, number = 6, page = {933-962}, publisher = {Journal of Hydraulic Research}, title = {Heat transport in the unsaturated zone - comparison of experimental results and numerical simulations}, volume = 36, year = 1998 }
185. 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
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  BibTeX
  @article{Helmig:1998b, author = {Helmig, Rainer and Bastian, Peter and Class, Holger and Ewing, John and Hinkelmann, Reinhard and Huber, Ralf Uwe and Jakobs, Hartmut and Sheta, Hussam}, month = {12}, note = {, IWS2ID=82 , Address: Berlin }, page = {123-131}, publisher = {Mathematical Geology}, title = {Architecture of the Modular Program System MUFTE-UG for Simulating Multiphase Flow and Transport Processes in Heterogeneous Porous Media}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/Geoscien.zip}, volume = 2, year = 1998 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/Geoscien.zip
186. Helmig, R., & Bastian, P. (1998). Fully-Coupled Solution Techniques for Two Phase Flow in Porous Media. Comparison and Verification.
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  @article{Helmig:1998e, author = {Helmig, Rainer and Bastian, Peter}, month = {12}, note = {, IWS2ID=85 }, publisher = {Advances in Water Resources}, title = {Fully-Coupled Solution Techniques for Two Phase Flow in Porous Media. Comparison and Verification}, year = 1998 }
187. Cirpka, O. A., Frind, E. O., & Helmig, R. (1998). Streamline-Oriented Grid-Generation of Transport Modelling in Two-Dimensional Domains Including Wells.
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  @article{Cirpka:1998a, author = {Cirpka, Olaf Arie and Frind, Emil O. and Helmig, Rainer}, month = {12}, note = {, IWS2ID=78 , Institution: Sonderforschungsbereich 404, Mehrfeldprobleme in der Kontinuumsmechanik , Address: Universität Stuttgart }, publisher = {Water Resources Research}, title = {Streamline-Oriented Grid-Generation of Transport Modelling in Two-Dimensional Domains Including Wells}, year = 1998 }
188. Helmig, R., & Zielke, W. (1996). Finite Elemente Simulation von Mehrphasenvorgängen im klüftigen Gestein. 1.
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  @article{Helmig:1996a, author = {Helmig, Rainer and Zielke, Werner}, month = {12}, note = {, IWS2ID=46 }, publisher = {Deutsche Gewässerkundliche Mitteilungen}, title = {Finite Elemente Simulation von Mehrphasenvorgängen im klüftigen Gestein}, volume = 1, year = 1996 }
189. Helmig, R., & Wittum, G. (1995). Vom Grundwassermodell zur Ökosystemmodellierung - Perspektiven der numerischen Hydromechanik-. 6.
  - BibTeX
  BibTeX
  @article{Helmig:1995e, author = {Helmig, Rainer and Wittum, Gabriel}, month = {12}, note = {, IWS2ID=31 , Address: Universität Stuttgart }, publisher = {UNI-Kurier}, title = {Vom Grundwassermodell zur Ökosystemmodellierung - Perspektiven der numerischen Hydromechanik-}, volume = 6, year = 1995 }
190. Helmig, R., & Braun, C. (1995). Simulation of Two-Phase Flow in Discrete Fracture Systems.
  - BibTeX
  BibTeX
  @article{Helmig:1995d, author = {Helmig, Rainer and Braun, Christopherus}, month = {12}, note = {, IWS2ID=30 }, publisher = {Monograph on Water Ineraction in Open Systems, Cambrige University Press.}, title = {Simulation of Two-Phase Flow in Discrete Fracture Systems}, year = 1995 }
191. Helmig, R. (1994). Modelling of Multiphase Flow in Fractured Rock.
  - BibTeX
  BibTeX
  @article{Helmig:1994e, author = {Helmig, Rainer}, month = {12}, note = {, IWS2ID=18 , Address: Waterloo, Canada }, publisher = {Geological Association of Canada, University of Waterloo Press.}, title = {Modelling of Multiphase Flow in Fractured Rock}, year = 1994 }
Monografien
1. Helmig, R., & Class, H. (2005). Grundlagen der Hydromechanik. Shaker Verlag.
  - BibTeX
  BibTeX
  @book{NULL, author = {Helmig, Rainer and Class, Holger}, isbn = {978-3-8322-4221-3}, month = {12}, note = {, IWS2ID=1725 , Address: Aachen }, publisher = {Shaker Verlag}, title = {Grundlagen der Hydromechanik}, year = 2005 }
2. Dietrich, P., Helmig, R., Sauter, M., Hötzl, H., Köngeter, J., & Teutsch, G. (2005). Flow and transport in fractured porous media. Springer-Verlag.
  - BibTeX
  BibTeX
  @book{NULL, author = {Dietrich, Peter and Helmig, Rainer and Sauter, Martin and Hötzl, Heinz and Köngeter, Jürgen and Teutsch, Georg}, isbn = {3-540-23270-2}, month = {12}, note = {, IWS2ID=1721 , Address: Berlin, Heidelberg }, publisher = {Springer-Verlag}, title = {Flow and transport in fractured porous media}, year = 2005 }
3. Helmig, R. (1997). Multiphase Flow and Transport Processes in the Subsurface: A Contribution to the Modeling of Hydrosystems. Springer-Verlag.
  - BibTeX
  BibTeX
  @book{Helmig:1997a, author = {Helmig, Rainer}, isbn = {3-540-62703-0}, month = {12}, note = {, IWS2ID=61 , Address: Berlin, Heidelberg }, page = {255}, publisher = {Springer-Verlag}, title = {Multiphase Flow and Transport Processes in the Subsurface: A Contribution to the Modeling of Hydrosystems}, year = 1997 }
4. Helmig, R. (1996). Einführung in die Numerischen Methoden der Hydromechanik (Bd. 86) [Mitteilungsheft]. Eigenverlag des Instituts für Wasserbau, Universität Stuttgart.
  - BibTeX
  BibTeX
  @book{Helmig:1996c, author = {Helmig, Rainer}, isbn = {3-921694-86-8}, month = {12}, note = {vergriffen, IWS2ID=526 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, page = {220}, publisher = {Eigenverlag des Instituts für Wasserbau, Universität Stuttgart}, title = {Einführung in die Numerischen Methoden der Hydromechanik}, type = {Mitteilungsheft}, volume = 86, year = 1996 }
Beiträge in Sammelband
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 (Hrsg.), Droplet Interactions and Spray Processes (Bd. 121, S. 149--159). Springer. https://doi.org/10.1007/978-3-030-33338-6
  - BibTeX
  - Link
  BibTeX
  @incollection{lh2-2020-lipp-locally, author = {Lipp, Melanie and Helmig, Rainer}, booktitle = {Droplet Interactions and Spray Processes}, doi = {10.1007/978-3-030-33338-6}, editor = {Lamanna, G. and Tonini, S. and Cossali, G.E. and Weigand, B.}, isbn = {978-3-030-33337-9}, pages = {149--159}, publisher = {Springer}, series = {Fluid Mechanics and Its Applications}, title = {A Locally-Refined Locally-Conservative Quadtree Finite-Volume Staggered-Grid Scheme}, url = {https://doi.org/10.1007/978-3-030-33338-6}, volume = 121, year = 2020 }
  Link
  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 (Hrsg.), Droplet Interactions and Spray Processes. Springer International Publishing. https://link.springer.com/chapter/10.1007/978-3-030-33338-6_11
  - BibTeX
  - Link
  BibTeX
  @incollection{ackermann2020upscaling, author = {Ackermann, Sina and Helmig, Rainer and Fest-Santini, Stephanie}, booktitle = {Droplet Interactions and Spray Processes}, editor = {Lamanna, Grazia and Tonini, Simona and Cossali, Gianpietro Elvio and Weigand, Bernhard}, isbn = {978-3-030-33338-6}, month = {04}, page = {139--148}, publisher = {Springer International Publishing}, title = {Upscaling of Coupled Free-Flow and Porous-Medium-Flow Processes}, url = {https://link.springer.com/chapter/10.1007/978-3-030-33338-6_11}, year = 2020 }
  Link
  https://link.springer.com/chapter/10.1007/978-3-030-33338-6_11
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 (Hrsg.), Droplet Interactions and Spray Processes (Bd. 121, S. 139--148). Springer. https://doi.org/10.1007/978-3-030-33338-6
  - BibTeX
  - Link
  BibTeX
  @incollection{lh2-2020-ackermann-upscaling, author = {Ackermann, Sina and Helmig, Rainer and Fest-Santini, Stephanie}, booktitle = {Droplet Interactions and Spray Processes}, doi = {10.1007/978-3-030-33338-6}, editor = {Lamanna, G. and Tonini, S. and Cossali, G.E. and Weigand, B.}, isbn = {978-3-030-33337-9}, pages = {139--148}, publisher = {Springer}, series = {Fluid Mechanics and Its Applications}, title = {Upscaling of Coupled Free-Flow and Porous-Medium-Flow Processes}, url = {https://doi.org/10.1007/978-3-030-33338-6}, volume = 121, year = 2020 }
  Link
  https://doi.org/10.1007/978-3-030-33338-6
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
  - BibTeX
  - Link
  BibTeX
  @incollection{NULL, author = {Schneider, Martin and Gläser, Dennis and Flemisch, Bernd and Helmig, Rainer}, booktitle = {Finite Volumes for Complex Applications VIII - Hyperbolic, Elliptic and Parabolic Problems: FVCA 8, 12.06.2017 - 16.06.2017, Lille}, month = {06}, note = {, IWS2ID=4425 }, publisher = {Springer-Verlag}, title = {Nonlinear finite-volume scheme for complex flow processes on corner-point grids}, url = {https://link.springer.com/chapter/10.1007/978-3-319-57394-6_44}, year = 2017 }
  Link
  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: Bd. Vol.94/07_08.
  - BibTeX
  BibTeX
  @incollection{NULL, author = {Ehlers, Wolfgang and Helmig, Rainer and Rohde, Christian}, journal = {Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik}, month = {07}, note = {, IWS2ID=2943 }, page = {555-690}, title = {Journal of Applied Mathematics and Mechanics, Special Issue: Deformation and transport phenomena in porous media, }, type = {Special-Issue}, volume = {Vol.94/07_08}, year = 2014 }
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, Hrsg.; No. 12; Nummer 12). De Gruyter. https://www.degruyter.com/view/product/182024
  - BibTeX
  - Link
  BibTeX
  @incollection{NULL, author = {Wolff, Markus and Cao, Yufei and Flemisch, Bernd and Helmig, Rainer and Wohlmuth, Barbara I.}, editor = {Bastian, P and Kraus, J and {Scheichl, R. & Wheeler}, M.}, month = {07}, note = {, IWS2ID=2835 }, number = 12, publisher = {De Gruyter}, title = {Multi-point flux approximation L-method in 3D: Numerical convergence and application to two-phase flow through porous media}, url = {https://www.degruyter.com/view/product/182024}, year = 2013 }
  Link
  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. (Hrsg.), Groundwater Quality 2010, 13.06.2010 - 18.06.2010, Zürich, Schweiz. IAHS Redbook.
  - BibTeX
  BibTeX
  @incollection{NULL, author = {Troldborg, Mads and Nowak, Wolfgang and Binning, Philip J. and Bjerg, Poul L. and Helmig, Rainer}, booktitle = {Groundwater Quality 2010, 13.06.2010 - 18.06.2010, Zürich, Schweiz}, editor = {Schirmer, M and et al.}, month = {06}, note = {, IWS2ID=2550 }, publisher = {IAHS Redbook}, title = {Uncertainty estimation of the mass discharge from a contaminated site using a fully Bayesian framework}, year = 2010 }
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 (Hrsg.), Handbook of Geomathematics. Springer-Verlag. https://www.springer.com/mathematics/applications/book/978-3-642-01545-8
  - BibTeX
  - Link
  BibTeX
  @incollection{NULL, author = {Helmig, Rainer and Niessner, Jennifer and Flemisch, Bernd and Wolff, Markus and Fritz, Jochen}, booktitle = {Handbook of Geomathematics}, editor = {Freeden, W and Nashed, Z and and T. Sonar}, month = {12}, note = {, IWS2ID=2511 }, page = {417-458}, publisher = {Springer-Verlag}, title = {Efficient modelling of flow and transport in porous media using multi-physics and multi-scale approaches}, url = {https://www.springer.com/mathematics/applications/book/978-3-642-01545-8}, year = 2010 }
  Link
  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 (Hrsg.), Upscaling Multiphase Flow in Porous Media. Springer-Verlag.
  - BibTeX
  BibTeX
  @incollection{eichel2005upscaling, author = {Eichel, Hartmut and Helmig, Rainer and Neuweiler, Insa and Cirpka, Olaf Arie}, booktitle = {Upscaling Multiphase Flow in Porous Media}, editor = {Das, D.B. & S.M. Hassanizadeh}, month = {06}, note = {, IWS2ID=1280 }, page = {237-257}, publisher = {Springer-Verlag}, title = {Upscaling of Two-Phase Flow Processes in Porous Media}, year = 2005 }
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
  - BibTeX
  - Link
  BibTeX
  @incollection{Hinkelmann:2004, author = {Hinkelmann, Reinhard and Helmig, Rainer}, booktitle = {Tag der Hydrologie 2004: Wasser- und Stofftransport in heterogenen Einzugsgebieten}, month = {03}, note = {, IWS2ID=763 , Address: Universität Potsdam }, title = {Mehrphasenmodelle für die ungesättigte Bodenzone - neue Modellierungsansätze in der Hydrologie}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/HinkHel_TagHyd_2004.pdf}, year = 2004 }
  Link
  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
  - BibTeX
  - Link
  BibTeX
  @incollection{Helmig:2003, author = {Helmig, Rainer and Hinkelmann, Reinhard and Class, Holger and Breiting, Thomas and Kobayashi, Kenichiro and Bielinski, Andreas and Sheta, Hussam}, booktitle = {Simulation und Visualisierung an der Universität Stuttgart, Universität Stuttgart}, month = {12}, note = {, IWS2ID=587 , Address: Universität Stuttgart }, page = {22-28}, publisher = {Referat für Presse- und Öffentlichkeitsarbeit}, title = {Modellierung des Ausbreitungsverhaltens umwelt- und klimagefährdender Gase im Untergrund}, type = {Broschüre}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/simulation_uni.pdf}, year = 2003 }
  Link
  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 (Hrsg.), High Performance Computing in Science and Engineering ’02. Springer-Verlag.
  - BibTeX
  BibTeX
  @incollection{Oelmann:2002b, author = {Ölmann, Ulrich and Hinkelmann, Reinhard and Helmig, Rainer}, booktitle = {High Performance Computing in Science and Engineering '02}, editor = {Krause, E. & W. Jäger}, month = {12}, note = {, IWS2ID=161 , Address: Berlin, Heidelberg , Partnerinstitution: High Performance Computing Center Stuttgart (HLRS) , Partneraddress: Universität Stuttgart }, page = {347-353}, publisher = {Springer-Verlag}, title = {Parallel Two-Phase Flow Simulations in Porous Media}, year = 2002 }
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 (Hrsg.), Ocean Margin Systems. Springer-Verlag. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/OMS_HinHel.zip
  - BibTeX
  - Link
  BibTeX
  @incollection{Hinkelmann:2000d, author = {Hinkelmann, Reinhard and Helmig, Rainer}, booktitle = {Ocean Margin Systems}, editor = {Wefer, G and Billett, D and Hebbelen, D and Jorgensen, B and Schlüter, M. & T. van Weering}, month = {12}, note = {, IWS2ID=140 , Address: Delmenhorst }, page = {269-294}, publisher = {Springer-Verlag}, title = {Numerical Modelling of Transport Processes in the Subsurface}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/OMS_HinHel.zip}, year = 2002 }
  Link
  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 (Hrsg.), IMA Volumes in Mathematics and its Applications, Volume 131: Resource Recovery, Confinement and Remediation of Environmental Hazards. Springer-Verlag.
  - BibTeX
  BibTeX
  @incollection{Hinkelmann:2002a, author = {Hinkelmann, Reinhard and Sheta, Hussam and Class, Holger and Sauter, Eberhard J. and Helmig, Rainer and Schlüter, Michael}, booktitle = {IMA Volumes in Mathematics and its Applications, Volume 131: Resource Recovery, Confinement and Remediation of Environmental Hazards}, editor = {Chadam, J. and Cunningham, A. and Ewing, R.E. and Ortoleva, P. & M. Wheeler}, month = {12}, note = {, IWS2ID=149 , Address: Tokyo, Berlin, New York }, page = {263-282}, publisher = {Springer-Verlag}, title = {Numerical Simulation of freshwater, salt water and methane interaction processes in a coastal aquifer}, year = 2002 }
15. Witte, B., Hinkelmann, R., & Helmig, R. (2002). Development of a Parallel FVM Based Groundwater Flow Model. In M. Breuer & F. & C. Z. Durst (Hrsg.), 3. International FORTWIHR Conference on High Performance Scientific and Engineering Computing (HPSEC), 12.03.2001 - 14.03.2001, Erlangen (No. 21; Nummer 21). Springer-Verlag. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/04.ps.gz
  - BibTeX
  - Link
  BibTeX
  @incollection{Witte:2001, author = {Witte, Björn and Hinkelmann, Reinhard and Helmig, Rainer}, booktitle = {3. International FORTWIHR Conference on High Performance Scientific and Engineering Computing (HPSEC), 12.03.2001 - 14.03.2001, Erlangen}, editor = {Breuer, M and Durst, F. & C. Zenger}, month = {03}, note = {, IWS2ID=142 }, number = 21, page = {29-36}, publisher = {Springer-Verlag}, title = {Development of a Parallel FVM Based Groundwater Flow Model}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/04.ps.gz}, year = 2002 }
  Link
  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 (Hrsg.), Zur Beschreibung komplexen Materialverhaltens: Beiträge zur Festschrift anläßlich des 50. Geburtstag von Herrn Prof. Dr.-Ing. W. Ehlers (Nos. II–7; Nummern II–7). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/main.ps.gz
  - BibTeX
  - Link
  BibTeX
  @incollection{Helmig:2001b, author = {Helmig, Rainer and Class, Holger and Hinkelmann, Reinhard}, booktitle = {Zur Beschreibung komplexen Materialverhaltens: Beiträge zur Festschrift anläßlich des 50. Geburtstag von Herrn Prof. Dr.-Ing. W. Ehlers}, editor = {Diebels, S.}, month = {12}, note = {, IWS2ID=137 , Institution: Institut für Mechanik , Address: Universität Stuttgart }, number = {II-7}, page = {107-119}, title = {Isothermal and Nonisothermal Multiphase Multicomponent Processes in the Subsurface}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/main.ps.gz}, year = 2001 }
  Link
  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 (Hrsg.), Groundwater Updates. Springer-Verlag. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/saitama.ps.gz
  - BibTeX
  - Link
  BibTeX
  @incollection{Hinkelmann:2000b, author = {Hinkelmann, Reinhard and Sheta, Hussam and Helmig, Rainer and Sauter, Eberhard J. and Schlüter, Michael}, booktitle = {Groundwater Updates}, editor = {Sato, K. & Y. Iwasa}, month = {12}, note = {, IWS2ID=120 , Address: Tokyo, Berlin, New York }, page = {295-300}, publisher = {Springer-Verlag}, title = {Numerical Simulation of Water-Gas Flow and Transport Processes in Coastal Aquifers}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/saitama.ps.gz}, year = 2000 }
  Link
  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 (Hrsg.), 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; Nummer 265). IAHS Redbook. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/mc.ps.gz
  - BibTeX
  - Link
  BibTeX
  @incollection{Hinkelmann:1999, author = {Hinkelmann, Reinhard and Sheta, Hussam and Class, Holger and Helmig, Rainer}, booktitle = {ModelCARE 99: International Conference on Calibration and Reliability in Groundwater Modeling - Coping with uncertainty, 20.09.1999 - 23.09.1999, ETH Zurich, Switzerland}, editor = {Stauffer, F and Kinzelbach, W and Kovar, K. & E. Hoehn}, month = {09}, note = {, IWS2ID=108 , Address: Zürich, Schweiz }, number = 265, page = {385-391}, publisher = {IAHS Redbook}, title = {A Comparison of Different Model Concepts for Salt Water Intrusion Processes}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/mc.ps.gz}, year = 2000 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/mc.ps.gz
Konferenzbeiträge
1. Fetzer, T., Grüninger, C., Flemisch, B., & Helmig, R. (2017, Juni). 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
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Fetzer, Thomas and Grüninger, Christoph and Flemisch, Bernd and Helmig, Rainer}, booktitle = {Finite Volumes for Complex Applications VIII - Hyperbolic, Elliptic and Parabolic Problems: FVCA 8, 12.06.2017 - 16.06.2017, Lille}, doi = {10.1007/978-3-319-57394-6_37}, month = {06}, note = {, IWS2ID=4418 }, page = {347--356}, publisher = {Springer-Verlag}, title = {On the Conditions for Coupling Free Flow and Porous Medium Flow in a Finite Volume Framework}, type = {Proceedings}, year = 2017 }
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
  - BibTeX
  - Link
  BibTeX
  @inproceedings{NULL, author = {Hommel, Johannes and Phillips, Adrienne and Gerlach, Robin and Cunningham, Alfred B. and Helmig, Rainer and Class, Holger}, booktitle = {7th GACM Colloquium on Computational Mechanics , 11.10.2017 - 13.10.2017, Stuttgart}, month = {11}, note = {, date=12.10.2017, IWS2ID=4486 }, page = {249-253}, title = {Modeling porous medium modification through induced calcite precipitation}, type = {Proceedings}, url = {https://dx.doi.org/10.18419/opus-9334}, year = 2017 }
  Link
  https://dx.doi.org/10.18419/opus-9334
3. Köppl, T., Helmig, R., & Wohlmuth, B. I. (2015, Oktober). 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.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Köppl, Tobias and Helmig, Rainer and Wohlmuth, Barbara I.}, booktitle = {3rd International Workshop on Computational Engineering CE 2014, 06.10.2014 - 10.10.2014, Universität Stuttgart}, month = {10}, note = {, date=09.10.2015, IWS2ID=3101 }, publisher = {Springer-Verlag}, title = {A multi-scale model for mass transport in arteries and tissue}, year = 2015 }
4. Mejri, E., Jambhekar, V. A., Helmig, R., & Rachida, B. (2015, Juni). 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.
  - BibTeX
  BibTeX
  @inproceedings{mejri2015reactive, author = {Mejri, Emna and Jambhekar, Vishal A. and Helmig, Rainer and Rachida, Bouhlila}, booktitle = {6th International Conference on Approximation Methods and Numerical Modelling in Environment and Natural Resources MAMERN Conference », University of Pau, France}, eventdate = {2015-06-01/2015-06-5}, eventtitle = {Mamern VI 2015}, language = {eng}, month = {06}, title = {A reactive transport model for the co-precipitation of Halite and Gypsum under evaporation from porous media}, venue = {Pau, France}, year = 2015 }
5. Richter, T., Rudlof, S., Adjibadji, B., Bernlöhr, H., Grüninger, C., Munz, C.-D., Rohde, C., & Helmig, R. (2012, Januar). 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.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Richter, Thomas and Rudlof, Stephan and Adjibadji, Bankole and Bernlöhr, Heiko and Grüninger, Christoph and Munz, Claus-Dieter and Rohde, Christian and Helmig, Rainer}, booktitle = {2011 IEEE International Symposium on Multimedia (ISM), 05.12.2011 - 07.12.2011, Dana Point, California USA}, isbn = {978-1-4577-2015-4}, month = {01}, note = {, date=06.12.2011, IWS2ID=2744 }, page = {537}, title = {ViPLab - A Virtual Programming Laboratory for Mathematics and Engineering}, year = 2012 }
6. Kissinger, A., Helmig, R., & Ebigbo, A. (2012). Modellierung des Transports von Frack-Fluiden, Lagerstättenwasser und Methan. In W. Frenz & P. K. andAxel Preuße (Hrsg.), 14. Aachener Altlasten- und Bergschadenkundliches Kolloquium: Unkonventionelle Gasgewinnung in NRW, 03.07.2012, Aachen (Bd. 99). GDMB Gesellschaft.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Kissinger, Alexander and Helmig, Rainer and Ebigbo, Anozie}, booktitle = {14. Aachener Altlasten- und Bergschadenkundliches Kolloquium: Unkonventionelle Gasgewinnung in NRW, 03.07.2012, Aachen}, editor = {Frenz, Walter and andAxel Preuße, Peter Kukla}, month = {07}, note = {, IWS2ID=2749 }, publisher = {GDMB Gesellschaft}, title = {Modellierung des Transports von Frack-Fluiden, Lagerstättenwasser und Methan}, volume = 99, year = 2012 }
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.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Oladyshkin, Sergey and Class, Holger and Helmig, Rainer and Nowak, Wolfgang}, booktitle = {European Geosciences Union (EGU) - General Assembly, 03.04.2011 - 08.04.2011, Vienna, Austria}, month = {04}, note = {, IWS2ID=2608 }, number = {EGU2011-11}, title = {Data-driven framework for history matching: application to carbon dioxide storage in geological formations}, type = {Proceedings}, volume = {Vol.13}, year = 2011 }
8. Oladyshkin, S., Class, H., Helmig, R., & Nowak, W. (2010, Dezember). 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.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Oladyshkin, Sergey and Class, Holger and Helmig, Rainer and Nowak, Wolfgang}, booktitle = {AGU Fall Meeting 2010, 13.12.2010 - 17.12.2010, San Francisco, USA}, month = {12}, note = {, date=17.12.2010, IWS2ID=2569 }, title = {Data-driven robust design and probabilistic risk assessment: application to underground carbon dioxide storage, Abstract H41L-03}, year = 2010 }
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.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Oladyshkin, Sergey and Class, Holger and Helmig, Rainer and Nowak, Wolfgang}, booktitle = {European Geosciences Union (EGU) - General Assembly, 02.05.2010 - 07.05.2010, Vienna, Austria}, journal = {Geophysical Research Abstracts}, month = {05}, note = {, IWS2ID=2525 }, number = {EGU2010-3559}, publisher = {E. Schweizerbart'sche Verlagsbuchhandlung}, title = {Probabilistic risk assessment for CO2 storage in geological formations: robust design and support for decision making under uncertainty}, volume = {Vol.12}, year = 2010 }
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. (Hrsg.), 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
  - BibTeX
  - Link
  BibTeX
  @inproceedings{NULL, author = {Enzenhöfer, Rainer and Nowak, Wolfgang and Helmig, Rainer}, booktitle = {Groundwater Quality 2010, 13.06.2010 - 18.06.2010, Zürich, Schweiz}, editor = {Schirmer, M and et al.}, isbn = {978-1-907161-16-}, month = {06}, note = {, date=16.06.2010, IWS2ID=2532 , Institution: eawag , Address: ETH Zurich, Switzerland }, publisher = {IAHS Redbook}, title = {Using probabilistic well vulnerability criteria for a risk-based preventive drinking water safety concept}, type = {Proceedings}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/S84REnzenhofer_review.pdf}, year = 2010 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/S84REnzenhofer_review.pdf
11. Enzenhöfer, R., Helmig, R., Nowak, W., & Binning, P. J. (2010, Dezember). 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.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Enzenhöfer, Rainer and Helmig, Rainer and Nowak, Wolfgang and Binning, Philip J.}, booktitle = {AGU Fall Meeting 2010, 13.12.2010 - 17.12.2010, San Francisco, USA}, month = {12}, note = {, date=17.12.2010, IWS2ID=2571 }, title = {Uncertainty in Model parameter Estimates and Impacts on Risk and Decision Making in the Subsurface, Abstract H42D-05}, type = {Vortrag}, year = 2010 }
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.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Troldborg, Mads and Nowak, Wolfgang and Binning, Philip J. and Bjerg, Poul L. and Helmig, Rainer}, booktitle = {ModelCARE: Calibration and Reliability in Groundwater Modeling - Managing Groundwater and the Environment, 20.09.2009 - 23.09.2009, Wuhan, China}, month = {09}, note = {, date=21.09.2009, IWS2ID=2486 , Institution: China University of Geosciences , Address: Wuhan, China }, title = {Quantifying uncertainty in mass discharge estimates from contaminated sites using a fully Bayesian framework}, year = 2009 }
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.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Helmig, Rainer and Class, Holger and Darcis, Melanie and Niessner, Jennifer and Erbertseder, Karin and Perfahl, Holger and Reuss, Matthias}, booktitle = {DFG Expertengespräch Medizintechnik, 06.11.2008 - 07.11.2008, Potsdam}, month = {11}, note = {, date=07.11.2008, IWS2ID=2409 }, title = {Transfer of modeling concepts for flow and transport processes in porous media systems to biological tissues}, year = 2008 }
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 (Hrsg.), Finite Volumes for Complex Applications V - Problems and Perspectives, 08.06.2008 - 13.06.2008, Aussois. Wiley - VCH Verlag.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Cao, Yufei and Helmig, Rainer and Wohlmuth, Barbara I.}, booktitle = {Finite Volumes for Complex Applications V - Problems and Perspectives, 08.06.2008 - 13.06.2008, Aussois}, editor = {Eymard, R. and Hérard, J.M.}, month = {06}, note = {, date=09.06.2008, IWS2ID=2311 }, page = {257-263}, publisher = {Wiley - VCH Verlag}, title = {The influence of the boundary discretization on the multipoint flux approximation L-method}, year = 2008 }
15. 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.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Kopp, Andreas and Probst, Peter and Class, Holger and Hurter, Suzanne and Helmig, Rainer}, booktitle = {9th International Conference on Greenhouse Gas Control Technologies (GHGT9), 16.11.2008 - 20.11.2008, Washington DC, USA}, month = {11}, note = {, date=18.11.2008, IWS2ID=2386 }, title = {Estimation of CO2 Storage Capacity Coefficients in Geologic Formations}, year = 2008 }
16. 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.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Helmig, Rainer and Darcis, Melanie and Class, Holger}, booktitle = {ASME International Mechanical Engineering Congress and Exposition, 31.10.2008 - 06.11.2008, Boston}, month = {11}, note = {, IWS2ID=3096 , Address: New York }, number = {WOS:000265081000004}, page = {29-32}, publisher = {Thema Umwelt - Praktischer Umweltschutz Schweiz}, title = {Transfer of modeling concepts for flow and transport processes in porous media from subsurface systems to biological tissues}, type = {Proceedings}, volume = 12, year = 2008 }
17. Flemisch, B., & Helmig, R. (2008). Numerical investigation of a mimetic finite difference method. In R. Eymard & J. M. Hérard (Hrsg.), 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
  - BibTeX
  - Link
  BibTeX
  @inproceedings{NULL, author = {Flemisch, Bernd and Helmig, Rainer}, booktitle = {Finite volumes for complex applications V - problems and perspectives, 08.06.2008 - 13.06.2008, Aussois, France}, editor = {Eymard, R. and Hérard, J.M.}, month = {06}, note = {, IWS2ID=2478 }, page = {815-824}, publisher = {Wiley - VCH Verlag}, title = {Numerical investigation of a mimetic finite difference method}, url = {https://www.iste.co.uk/index.php?p=a&ACTION=View&id=220}, year = 2008 }
  Link
  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 (Hrsg.), 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
  - BibTeX
  - Link
  BibTeX
  @inproceedings{NULL, author = {Flemisch, Bernd and Fritz, Jochen and Helmig, Rainer and Niessner, Jennifer and Wohlmuth, Barbara I.}, booktitle = {ECCOMAS Thematic Conference on Multi-scale Computational Methods for Solids and Fluids, 28.11.2007 - 30.11.2007, Paris, France}, editor = {Ibrahimbegovic, A. and Dias, F.}, month = {11}, note = {, date=29.11.2007, IWS2ID=2354 }, page = {82-87}, title = {DUMUX: a multi-scale multi-physics toolbox for flow and transport processes in porous media}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/cachan_flemisch.pdf}, year = 2007 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/cachan_flemisch.pdf
19. 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 (Hrsg.), Theoretical and Numerical Unsaturated Soil Mechanics. Springer-Verlag.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Freiboth, Sandra and Class, Holger and Helmig, Rainer}, booktitle = {Theoretical and Numerical Unsaturated Soil Mechanics}, editor = {Schanz, T.}, isbn = {978-3-540-69875-3}, month = {03}, note = {, date=08.03.2007, IWS2ID=2012 , Address: Berlin }, page = {127-134}, publisher = {Springer-Verlag}, title = {Numerical Simulation of Multiphase Multicomponent Processes Considering Structural Alterations of Porous Media - a Phenomenological Model}, year = 2007 }
20. 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 (Hrsg.), Eurotherm 81, ALbi, France, 04.06.2007 - 06.06.2007, Albi, France.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Ochs, Steffen Oliver and Class, Holger and Helmig, Rainer and Acosta, Maria}, booktitle = {Eurotherm 81, ALbi, France, 04.06.2007 - 06.06.2007, Albi, France}, editor = {Qintard, M.}, month = {06}, note = {, IWS2ID=2109 }, title = {Simulation of multiphase multicomponent processes in the diffusion layer of PEM fuel cells}, type = {Proceedings}, year = 2007 }
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 (Hrsg.), VEGAS - Statuskolloquium 2006, 28.09.2006 - 28.09.2006, Stuttgart (No. 09_2006; Nummer 09_2006).
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Ochs, Steffen Oliver and Class, Holger and Helmig, Rainer}, booktitle = {VEGAS - Statuskolloquium 2006, 28.09.2006 - 28.09.2006, Stuttgart}, editor = {Braun, J. and Koschitzky, H.-P. & M. Stuhrmann}, month = {09}, note = {, date=28.09.2006, IWS2ID=2071 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {09_2006}, page = {71-81}, title = {Fortschritte bei der Entwicklung eines prognosefähigen numerischen Modells zur Simulation der Dampfinjektion in die gesättigte Bodenzone}, type = {Tagungsband}, year = 2006 }
22. Helmig, R., Miller, C. T., Jakobs, H., Class, H., Hilpert, M., Kees, C. E., & Niessner, J. (2006, Juni). 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.
  - BibTeX
  BibTeX
  @inproceedings{helmig2006multiphase, author = {Helmig, Rainer and Miller, Cass T. and Jakobs, Hartmut and Class, Holger and Hilpert, Markus and Kees, Christopher E. and Niessner, Jennifer}, booktitle = {Progress in Industrial Mathematics at ECMI 2004, 21.06.2004 - 25.06.2004, Eindhoven University of Technology}, month = {06}, note = {, date=24.06.2004, IWS2ID=1310 , Address: Eindhoven University of Technology }, publisher = {Springer-Verlag}, title = {Multiphase Flow and Transport Modeling in Heterogeneous Porous Media}, type = {Vortrag}, year = 2006 }
23. Niessner, J., & Helmig, R. (2006, Juni). 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
  - BibTeX
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  BibTeX
  @inproceedings{NULL, author = {Niessner, Jennifer and Helmig, Rainer}, booktitle = {16. International Conference on Computational Methods in Water Resources, 18.06.2006 - 22.06.2006, Copenhagen, Denmark}, month = {06}, note = {, date=19.06.2006, IWS2ID=1925 }, title = {Multi-scale modeling of two-phase-two-component processes in heterogeneous porous media }, url = {https://proceedings.cmwr-xvi.org/getFile.py/access?contribId=110&sessionId=10&resId=0&materialId=paper&confId=a051}, year = 2006 }
  Link
  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, Juni). Numerical Modeling of CO2 Sequestration with MUFTE-UG. http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/CMWR2006UniStuttgart.pdf
  - BibTeX
  - Link
  BibTeX
  @inproceedings{NULL, author = {Ebigbo, Anozie and Bielinski, Andreas and Kopp, Andreas and Class, Holger and Helmig, Rainer}, month = {06}, note = {CMWR XVI - Computational Methods in Water Resources, XVI International Conference, Copenhagen, Denmark, June 19-22 2006, IWS2ID=1867 }, title = {Numerical Modeling of CO2 Sequestration with MUFTE-UG}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/CMWR2006UniStuttgart.pdf }, year = 2006 }
  Link
  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.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Helmig, Rainer and Sheta, Hussam}, booktitle = {4. Internationale Grubengas-Tage, 15.09.2005 - 16.09.2005, Bochum}, month = {09}, note = {, date=16.09.2005, IWS2ID=1726 , Address: Bochum }, title = {Numerische Simulation von Gasströmen im Grubengebäude und im Gebirge}, year = 2005 }
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 (Hrsg.), 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.
  - BibTeX
  BibTeX
  @inproceedings{HoelzClassHelm:2004, author = {Hölzemann, Sandra and Class, Holger and Helmig, Rainer}, booktitle = {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}, editor = {Schanz, T.}, isbn = {3-540-21122-5}, month = {09}, note = {, date=19.09.2003, IWS2ID=579 }, publisher = {Springer-Verlag}, title = {A New Concept for the Numerical Simulation and Parameter Identification of Multiphase Flow and Transport Processes in Cohesive Soils}, year = 2004 }
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 (Hrsg.), 15. International Conference on Computational Methods in Water Resources, 13.06.2004 - 17.06.2004, Chapel Hill, North Carolina, USA (Bd. 1). Elsevier Science Publishers B.V.
  - BibTeX
  BibTeX
  @inproceedings{Manthey:2004a, author = {Manthey, Sabine and Oung, Oubbol and Hassanizadeh, S. Majid and Helmig, Rainer}, booktitle = {15. International Conference on Computational Methods in Water Resources, 13.06.2004 - 17.06.2004, Chapel Hill, North Carolina, USA}, editor = {Miller, C.T and Farthing, W.F and Gray, W.G. & G.F. Pinder}, month = {06}, note = {, date=16.06.2004, IWS2ID=864 , Address: Chapel Hill, North Carolina, USA }, page = {631-644}, publisher = {Elsevier Science Publishers B.V.}, title = {Dynamic capillary pressure effects in two-phase flow in heterogeneous porous media}, volume = 1, year = 2004 }
28. Hölzemann, S., Class, H., & Helmig, R. (2004, Juni). 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.
  - BibTeX
  BibTeX
  @inproceedings{HoelzClassHelm:2004a, author = {Hölzemann, Sandra and Class, Holger and Helmig, Rainer}, booktitle = {15. International Conference on Computational Methods in Water Resources, 13.06.2004 - 17.06.2004, Chapel Hill, North Carolina, USA}, month = {06}, note = {, date=15.06.2004, IWS2ID=590 , Address: Chapel Hill, North Carolina, USA }, publisher = {Elsevier Science Publishers B.V.}, title = {Numerical Modeling of Multiphase Flow and Transport Processes in Cohesive Soils and Parameter Identification Strategies}, year = 2004 }
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 (Hrsg.), 15. International Conference on Computational Methods in Water Resources, 13.06.2004 - 17.06.2004, Chapel Hill, North Carolina, USA (Bd. 1). Elsevier Science Publishers B.V. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/niessner_2004.pdf
  - BibTeX
  - Link
  BibTeX
  @inproceedings{Niessner:2004a, author = {Niessner, Jennifer and Helmig, Rainer and Jakobs, Hartmut and Roberts, Jean}, booktitle = {15. International Conference on Computational Methods in Water Resources, 13.06.2004 - 17.06.2004, Chapel Hill, North Carolina, USA}, editor = {Miller, C.T and Farthing, W.F and Gray, W.G. & G.F. Pinder}, month = {06}, note = {, date=16.06.2004, IWS2ID=815 , Address: Chapel Hill, North Carolina, USA }, page = {597-608}, publisher = {Elsevier Science Publishers B.V.}, title = {Interface condition and exact linearization in the Newton iterations for two-phase flow in heterogeneous porous media}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/niessner_2004.pdf}, volume = 1, year = 2004 }
  Link
  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 (Hrsg.), 6. International Conference on Hydroinformatics 2004, 21.06.2004 - 24.06.2004, Singapore (Bd. 1). World Scientific Publishing Company. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/hydroinformatics_2004.pdf
  - BibTeX
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  BibTeX
  @inproceedings{Hinkelmann:2004, author = {Hinkelmann, Reinhard and Breiting, Thomas and Kobayashi, Kenichiro and Helmig, Rainer and Sheta, Hussam}, booktitle = {6. International Conference on Hydroinformatics 2004, 21.06.2004 - 24.06.2004, Singapore}, editor = {Liong, S.Y and Phoon, K.K. & V. Babovic}, month = {06}, note = {, date=21.06.2004, IWS2ID=589 , Address: Singapore }, page = {222-229}, publisher = {World Scientific Publishing Company}, title = {Application of Hydroinformatic Methods and Techniques for Complex Systems - Quantification of Methane Migration Processes from Abandoned Coal Mines}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/hydroinformatics_2004.pdf}, volume = 1, year = 2004 }
  Link
  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 (Hrsg.), 15. International Conference on Computational Methods in Water Resources, 13.06.2004 - 17.06.2004, Chapel Hill, North Carolina, USA (Bd. 1). Elsevier Science Publishers B.V.
  - BibTeX
  BibTeX
  @inproceedings{Neuweiler:2004a, author = {Neuweiler, Insa and Cirpka, Olaf Arie and Eichel, Hartmut and Helmig, Rainer}, booktitle = {15. International Conference on Computational Methods in Water Resources, 13.06.2004 - 17.06.2004, Chapel Hill, North Carolina, USA}, editor = {Miller, C.T and Farthing, W.F and Gray, W.G. & G.F. Pinder}, month = {06}, note = {, date=17.06.2004, IWS2ID=863 , Address: Chapel Hill, North Carolina, USA }, page = {313-324}, publisher = {Elsevier Science Publishers B.V.}, title = {Infiltration of DNAPL into heterogeneous water-saturated soil with different connectivity properties}, volume = 1, year = 2004 }
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 (Hrsg.), 15. International Conference on Computational Methods in Water Resources, 13.06.2004 - 17.06.2004, Chapel Hill, North Carolina, USA (Bd. 1). Elsevier Science Publishers B.V. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/CMWR_paul.pdf
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  BibTeX
  @inproceedings{Paul:2004a, author = {Paul, Maren and Helmig, Rainer and Cunningham, Alfred B.}, booktitle = {15. International Conference on Computational Methods in Water Resources, 13.06.2004 - 17.06.2004, Chapel Hill, North Carolina, USA}, editor = {Miller, C.T and Farthing, W.F and Gray, W.G. & G.F. Pinder}, month = {06}, note = {, IWS2ID=871 , Address: Chapel Hill, North Carolina, USA }, publisher = {Elsevier Science Publishers B.V.}, title = {International Remediation - Development of an online-based course for German and American students}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/CMWR_paul.pdf}, volume = 1, year = 2004 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/CMWR_paul.pdf
33. Kobayashi, K., Hinkelmann, R., & Helmig, R. (2003). Comparison of different model concepts for gas-water processes in the subsurface. In J. & P. P. Ganoulis (Hrsg.), 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
  - BibTeX
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  BibTeX
  @inproceedings{Kobayashi:2003, author = {Kobayashi, Kenichiro and Hinkelmann, Reinhard and Helmig, Rainer}, booktitle = {30. IAHR Congress: Water Engineering and Research in a Learning Society, 24.08.2003 - 29.08.2003, Thessaloniki, Greece}, editor = {Ganoulis, J. & P. Prinos}, isbn = {960-243-598-1}, month = {08}, note = {Theme B: Multiphase Flow, Quality, Properties, date=29.08.2003, IWS2ID=158 , Address: Thessaloniki, Greece }, page = {661-668}, title = {Comparison of different model concepts for gas-water processes in the subsurface}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Ken_IAHR_03.zip}, year = 2003 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Ken_IAHR_03.zip
34. 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
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  BibTeX
  @inproceedings{Sheta:2003, author = {Sheta, Hussam and Helmig, Rainer and Hinkelmann, Reinhard}, booktitle = {Oberhausener Grubengas-Tage 2003 "CMM Technologie" Erfahrungen und Aussichten in Deutschland und international, 20.03.2003 - 21.03.2003, Oberhausen}, month = {03}, note = {, date=20.03.2003, IWS2ID=578 , Institution: Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT , Address: Stuttgart }, number = 44, page = {135-150}, publisher = {Fraunhofer IRB Verlag}, title = {Dreidimensionale numerische Simulation von Methangasmigrationen im Untergrund}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/sheta_oberhausen_2003.pdf}, year = 2003 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/sheta_oberhausen_2003.pdf
35. 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 (Hrsg.), 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
  - BibTeX
  - Link
  BibTeX
  @inproceedings{Breiting:2003, author = {Breiting, Thomas and Hinkelmann, Reinhard and Sheta, Hussam and Helmig, Rainer}, booktitle = {30. IAHR Congress: Water Engineering and Research in a Learning Society, 24.08.2003 - 29.08.2003, Thessaloniki, Greece}, editor = {Ganoulis, J. & P. Prinos}, month = {08}, note = {Theme D: Hydroinformatics and advanced Data Technology in Egineering Practice, date=26.08.2003, IWS2ID=157 , Address: Thessaloniki, Greece }, page = {263-270}, title = {Coupling of hydroinformatic methods and techniques for the simulation of gas-water flow processes in the subsurface}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Breiting_IAHR_03.zip}, year = 2003 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Breiting_IAHR_03.zip
36. Süß, M., Eichel, H., & Helmig, R. (2003, Oktober). 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.
  - BibTeX
  BibTeX
  @inproceedings{Suess:2003, author = {Süß, Mia and Eichel, Hartmut and Helmig, Rainer}, booktitle = {4. Workshop "Porous Media", 05.12.2002 - 06.12.2002, Blaubeuren}, month = {10}, note = {(CD-ROM), date=05.12.2002, IWS2ID=239 , Address: Blaubeuren }, title = {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}, year = 2003 }
37. 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 (Hrsg.), 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
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  BibTeX
  @inproceedings{Paul:2003, author = {Paul, Maren and Müller, Marc and Hinkelmann, Reinhard and Helmig, Rainer and Kaule, Giselher}, booktitle = {30. IAHR Congress: Water Engineering and Research in a Learning Society, 24.08.2003 - 29.08.2003, Thessaloniki, Greece}, editor = {Ganoulis, J. & P. Prinos}, isbn = {960-243-598-1}, month = {08}, note = {Theme E: New Media and Water Related Education, date=28.08.2003, IWS2ID=156 , Address: Thessaloniki, Greece }, page = {153-159}, title = {Development of an interactive learning module for GIS-supported groundwater flow simulation}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Paul_IAHR_03.zip}, year = 2003 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Paul_IAHR_03.zip
38. Hinkelmann, R., Helmig, R., Paul, M., & Breiting, T. (2003). Teleteaching and Telelearning in Environmental and Water-Related Engineering Education. In J. & P. P. Ganoulis (Hrsg.), 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
  - BibTeX
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  BibTeX
  @inproceedings{Hinkelmann:2003, author = {Hinkelmann, Reinhard and Helmig, Rainer and Paul, Maren and Breiting, Thomas}, booktitle = {30. IAHR Congress: Water Engineering and Research in a Learning Society, 24.08.2003 - 29.08.2003, Thessaloniki, Greece}, editor = {Ganoulis, J. & P. Prinos}, month = {08}, note = {Theme E: Experiences from Web-based Education, date=29.08.2003, IWS2ID=155 , Address: Thessaloniki, Greece }, page = {291-298}, title = {Teleteaching and Telelearning in Environmental and Water-Related Engineering Education}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/Phillip_IAHR_03.zip}, year = 2003 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/Phillip_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
  - BibTeX
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  BibTeX
  @inproceedings{Breiting:2003b, author = {Breiting, Thomas and Hinkelmann, Reinhard and Helmig, Rainer}, booktitle = {Oberhausener Grubengas-Tage 2003 "CMM Technologie" Erfahrungen und Aussichten in Deutschland und international, 20.03.2003 - 21.03.2003, Oberhausen}, month = {03}, note = {, date=20.03.2003, IWS2ID=192 , Institution: Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT , Address: Stuttgart }, number = 44, page = {151-164}, publisher = {Fraunhofer IRB Verlag}, title = {Kopplung von hydroinformatischen Methoden und Techniken für die Simulation von Gas-Wasser-Strömungsprozessen im Untergrund}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/breiting_gastage.zip}, year = 2003 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/breiting_gastage.zip
40. Bielinski, A., Class, H., & Helmig, R. (2003, Oktober). Numerische Simulation von CO2-Speicherung im Untergrund. 4. Workshop „Porous Media“, 05.12.2002 - 06.12.2002, Blaubeuren.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Bielinski, Andreas and Class, Holger and Helmig, Rainer}, booktitle = {4. Workshop "Porous Media", 05.12.2002 - 06.12.2002, Blaubeuren}, month = {10}, note = {(CD-ROM), date=05.12.2002, IWS2ID=1667 , Address: Blaubeuren }, title = {Numerische Simulation von CO2-Speicherung im Untergrund}, year = 2003 }
41. 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 (Hrsg.), 14. International Conference on Computational Methods in Water Resources, 23.06.2002 - 28.06.2002, Delft, The Netherlands (Bd. 1). Elsevier Science Publishers B.V. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/delft01.ps
  - BibTeX
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  BibTeX
  @inproceedings{Gebauer:2002, author = {Gebauer, Susanna and Neunhäuserer, Lina and Kornhuber, Ralf and Ochs, Steffen Oliver and Hinkelmann, Reinhard and Helmig, Rainer}, booktitle = {14. International Conference on Computational Methods in Water Resources, 23.06.2002 - 28.06.2002, Delft, The Netherlands}, editor = {Hassanizadeh, S.M and Schotting, R.J and Gray, W.G. & G.F. Pinder}, month = {06}, note = {, date=24.06.2002, IWS2ID=144 , Address: Amsterdam, The Netherlands }, page = {335-342}, publisher = {Elsevier Science Publishers B.V.}, title = {Equidimensional Modelling of Flow and Transport Processes in Fractured Porous Systems I}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/delft01.ps}, volume = 1, year = 2002 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/delft01.ps
42. 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 (Hrsg.), 4. International Conference on Calibration and Reliability in Groundwater Modelling (ModelCARE 2002), 17.06.2002 - 20.06.2002, Prague, Czech Republic (Bd. 2). Acta Universitatis Carolinae - Geologica. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/modelcare_02.zip
  - BibTeX
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  BibTeX
  @inproceedings{Kobayashi:2002, author = {Kobayashi, Kenichiro and Hinkelmann, Reinhard and Sheta, Hussam and Helmig, Rainer}, booktitle = {4. International Conference on Calibration and Reliability in Groundwater Modelling (ModelCARE 2002), 17.06.2002 - 20.06.2002, Prague, Czech Republic}, editor = {Kovar, K. & Z. Hrkal}, month = {06}, note = {, date=18.06.2002, IWS2ID=146 , Address: Prague, Czech Republic }, page = {571-574}, publisher = {Acta Universitatis Carolinae - Geologica}, title = {Scale-Dependent Influences of Geostatistical Permeability Distributions on Gas-Water Flow Processes}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/modelcare_02.zip}, volume = 2, year = 2002 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/modelcare_02.zip
43. Class, H., Bielinski, A., & Helmig, R. (2002, Oktober). CO2-Injektion in geologische Formationen - numerische Berechnungen und erste Überlegungen für großskalige Experimente in VEGAS. VEGAS Statuskolloquium, 12.10.2001, Universität Stuttgart.
  - BibTeX
  BibTeX
  @inproceedings{class2002co2injektion, author = {Class, Holger and Bielinski, Andreas and Helmig, Rainer}, booktitle = {VEGAS Statuskolloquium, 12.10.2001, Universität Stuttgart}, month = {10}, note = {, date=10.10.2002, IWS2ID=1373 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, title = {CO2-Injektion in geologische Formationen - numerische Berechnungen und erste Überlegungen für großskalige Experimente in VEGAS}, year = 2002 }
44. Helmig, R., Jakobs, H., & Class, H. (2002, Juni). 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.
  - BibTeX
  BibTeX
  @inproceedings{Helmig:2002c, author = {Helmig, Rainer and Jakobs, Hartmut and Class, Holger}, booktitle = {14. International Conference on Computational Methods in Water Resources, 23.06.2002 - 28.06.2002, Delft, The Netherlands}, month = {06}, note = {, date=25.06.2002, IWS2ID=153 , Address: Amsterdam, The Netherlands }, publisher = {Elsevier Science Publishers B.V.}, title = {Multiphase flow and transport modeling in heterogeneous porous media}, year = 2002 }
45. 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 (Hrsg.), 5. International Conference on Hydroinformatics 2002, 01.07.2002 - 05.07.2002, Cardiff, Wales, UK (Bd. 2). IWA Publishing. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Hydroinformatics_2002.ps.gz
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  BibTeX
  @inproceedings{Oelmann:2002a, author = {Ölmann, Ulrich and Hinkelmann, Reinhard and Manthey, Sabine and Lang, Steffan and Helmig, Rainer}, booktitle = {5. International Conference on Hydroinformatics 2002, 01.07.2002 - 05.07.2002, Cardiff, Wales, UK}, editor = {Cluckie, I.D and Han, D and Davis, J.P. & S. Heslop}, month = {07}, note = {Software Tools and Management Systems, date=03.07.2002, IWS2ID=150 , Address: London, UK }, page = {1441-1446}, publisher = {IWA Publishing}, title = {Parallel Numerical Simulation with MUFTE-UG: Two-Phase Flow Processes in the Subsurface}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Hydroinformatics_2002.ps.gz}, volume = 2, year = 2002 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Hydroinformatics_2002.ps.gz
46. 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
  - BibTeX
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  BibTeX
  @inproceedings{Ochs:2002, author = {Ochs, Steffen Oliver and Hinkelmann, Reinhard and Neunhäuserer, Lina and Süß, Mia and Helmig, Rainer and Gebauer, Susanna and Kornhuber, Ralf}, booktitle = {5. International Conference on Hydroscience and Engineering, ICHE2002, Advances in Hydro-Science and -Engineering, 17.09.2002 - 21.09.2002, Warschau, Poland}, month = {09}, note = {, IWS2ID=154 , Address: Warschau, Poland }, title = {Adaptive methods for the equidimensional modelling of flow and transport processes in fractured aquifers}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/ochs2002.zip}, year = 2002 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/ochs2002.zip
47. 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.
  - BibTeX
  BibTeX
  @inproceedings{NULL, author = {Jakobs, Hartmut and Bielinski, Andreas and Class, Holger and Helmig, Rainer}, booktitle = {International Conference on Multifield Problems, 08.04.2002 - 10.04.2002, Stuttgart}, month = {04}, note = {, IWS2ID=3097 , Institution: Universität Stuttgart , Address: Stuttgart }, number = {WOS:000189408100035}, page = {295-300}, publisher = {Springer-Verlag}, title = {Modeling of heterogeneities for twophase flow in the subsurface}, type = {Proceedings}, volume = 12, year = 2002 }
48. Paul, M., Hinkelmann, R., Sheta, H., & Helmig, R. (2001). Two-phase flow modelling of flood defense structures. In W. Ehlers (Hrsg.), 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
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  BibTeX
  @inproceedings{Paul:1999a, author = {Paul, Maren and Hinkelmann, Reinhard and Sheta, Hussam and Helmig, Rainer}, booktitle = {IUTAM Symposium on Theoretical and Numerical Methods in Continuum Mechanics of Porous Materials, 05.09.1999 - 10.09.1999, Universität Stuttgart}, editor = {Ehlers, W.}, month = {09}, note = {, date=07.09.1999, IWS2ID=114 , Address: Dordrecht, Boston, London }, page = {163-168}, publisher = {Kluver Academic Publisher}, title = {Two-phase flow modelling of flood defense structures}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/iutam_paul.ps.gz}, year = 2001 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/iutam_paul.ps.gz
49. 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 (Hrsg.), 3. Workshop „Teilgesättigte Böden“, 12.10.2001, Bauhaus-Universität Weimar.
  - BibTeX
  BibTeX
  @inproceedings{Bielinski:2001a, author = {Bielinski, Andreas and Class, Holger and Jakobs, Hartmut and Helmig, Rainer}, booktitle = {3. Workshop "Teilgesättigte Böden", 12.10.2001, Bauhaus-Universität Weimar}, editor = {Schanz, T.}, month = {10}, note = {, date=12.10.2001, IWS2ID=151 , Address: Bauhaus-Universität Weimar }, title = {Numerical Simulation of Desiccation Processes in a Mineral Liner of a Waste-Disposal Site}, year = 2001 }
50. Class, H., Bielinski, A., & Helmig, R. (2001, Oktober). Numerische Simulation von Mehrphasen-Mehrkomponenten-Systemen: Effiziente Algorithmen, Möglichkeiten und Probleme. VEGAS Statuskolloquium, 12.10.2001, Universität Stuttgart.
  - BibTeX
  BibTeX
  @inproceedings{class2001numerische, author = {Class, Holger and Bielinski, Andreas and Helmig, Rainer}, booktitle = {VEGAS Statuskolloquium, 12.10.2001, Universität Stuttgart}, month = {10}, note = {, date=12.10.2001, IWS2ID=1374 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, title = {Numerische Simulation von Mehrphasen-Mehrkomponenten-Systemen: Effiziente Algorithmen, Möglichkeiten und Probleme}, year = 2001 }
51. Helmig, R., Jakobs, H., Bastian, P., & Reichenberger, V. (2000, Dezember). Gas Water Flow and Transport Processes in Fractured Porous Media. BMWi - BmBF - Unterauftrag zum Vorhaben 02 E 9027 8.
  - BibTeX
  BibTeX
  @inproceedings{Helmig:2000c, author = {Helmig, Rainer and Jakobs, Hartmut and Bastian, Peter and Reichenberger, Volker}, booktitle = {BMWi - BmBF - Unterauftrag zum Vorhaben 02 E 9027 8}, month = {12}, note = {to appear in Report, IWS2ID=66 , Institution: Institut für ComputerAnwendungen im Bauingenieurwesen , Address: Technische Universität Braunschweig }, title = {Gas Water Flow and Transport Processes in Fractured Porous Media}, year = 2000 }
52. 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 (Hrsg.), International Workshop „Numerical Treatment of Multiphase Flows in Porous Media“, 02.08.1999 - 06.08.1999, Beijing, China. Springer-Verlag.
  - BibTeX
  BibTeX
  @inproceedings{Bastian:2000, author = {Bastian, Peter and Chen, Zhangxin and Ewing, Richard E. and Helmig, Rainer and Jakobs, Hartmut and Reichenberger, Volker}, booktitle = {International Workshop "Numerical Treatment of Multiphase Flows in Porous Media", 02.08.1999 - 06.08.1999, Beijing, China}, editor = {Chen, Z and {Ewing, R.E. & Shi}, Z.-C.}, month = {08}, note = {Series: Lecture Notes in Physics. Vol. 552, IWS2ID=115 , Address: Berlin, Heidelberg }, publisher = {Springer-Verlag}, title = {Numerical Simulation of Multiphase Flow in Fractured Porous Media}, year = 2000 }
53. Breiting, T., Hinkelmann, R., Manthey, S., & Helmig, R. (2000, Oktober). 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
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  BibTeX
  @inproceedings{Breiting:2000a, author = {Breiting, Thomas and Hinkelmann, Reinhard and Manthey, Sabine and Helmig, Rainer}, booktitle = {Beitrag zum Darmstädter Wasserbauliches Kolloquium 99, 14.10.1999 - 15.10.1999, Technische Universität Darmstadt}, month = {10}, note = {Mitteilungen Heft 111, date=14.10.1999, IWS2ID=99 , Institution: Institut für Wasserbau und Wasserwirtschaft , Address: Technische Universität Darmstadt }, page = {104-112}, title = {Methanausbreitung im Untergrund}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/dawako.ps.gz}, year = 2000 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/dawako.ps.gz
54. 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 (Hrsg.), 13. International Conference on Computational Methods in Water Resources, 25.06.2000 - 29.06.2000, Calgary, Canada (Bd. 1). A.A. Balkema Publishers. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/cmwr00.ps.gz
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  - Link
  BibTeX
  @inproceedings{Paul:2000, author = {Paul, Maren and Stauffer, Fritz and Hinkelmann, Reinhard and Helmig, Rainer}, booktitle = {13. International Conference on Computational Methods in Water Resources, 25.06.2000 - 29.06.2000, Calgary, Canada}, editor = {Bentley, L.R and {J.F. Sykes, C.A. Brebbia}, W.C. Gray & G.F. Pinder}, month = {06}, note = {, date=27.06.2000, IWS2ID=127 , Address: Calgary, Canada }, page = {201-208}, publisher = {A.A. Balkema Publishers}, title = {Calibration of a Water-Gas Flow Model for Dike Systems}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/cmwr00.ps.gz}, volume = 1, year = 2000 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/cmwr00.ps.gz
55. Hemminger, A., Neunhäuserer, L., & Helmig, R. (2000). The Reliability of a Stochastic Fracture Generator. In F. Stauffer, W. Kinzelbach, & K. & E. H. Kovar (Hrsg.), 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.
  - BibTeX
  BibTeX
  @inproceedings{Hemminger:1999, author = {Hemminger, Annette and Neunhäuserer, Lina and Helmig, Rainer}, booktitle = {ModelCARE 99: International Conference on Calibration and Reliability in Groundwater Modeling - Coping with uncertainty, 20.09.1999 - 23.09.1999, ETH Zurich, Switzerland}, editor = {Stauffer, F and Kinzelbach, W and Kovar, K. & E. Hoehn}, month = {09}, note = {, IWS2ID=107 , Address: Zürich, Schweiz }, publisher = {IAHS Redbook}, title = {The Reliability of a Stochastic Fracture Generator}, year = 2000 }
56. Breiting, T., Hinkelmann, R., & Helmig, R. (2000, Juli). 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
  - BibTeX
  - Link
  BibTeX
  @inproceedings{Breiting:2000b, author = {Breiting, Thomas and Hinkelmann, Reinhard and Helmig, Rainer}, booktitle = {4. International Conference on Hydroinformatics 2000, 23.07.2000 - 27.07.2000, Iowa, USA}, month = {07}, note = {(CD-ROM), date=25.07.2000, IWS2ID=116 , Address: Iowa, USA }, title = {Modeling of Hydrosystems with MUFTE-UG: Multiphase Flow and Transport Processes in the Subsurface}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hydroinf_2000.zip}, year = 2000 }
  Link
  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 (Hrsg.), 3. Workshop Kluftaquifere „‚Gekoppelte Prozesse in Geosystemen‘“, 02.11.2000 - 03.11.2000, Universität Hannover (No. 60; Nummer 60). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hannover00.ps.gz
  - BibTeX
  - Link
  BibTeX
  @inproceedings{Neunhaeuserer:2000, author = {Neunhäuserer, Lina and Gebauer, Susanna and Hinkelmann, Reinhard and Kornhuber, Ralf and Helmig, Rainer}, booktitle = {3. Workshop Kluftaquifere ''Gekoppelte Prozesse in Geosystemen'', 02.11.2000 - 03.11.2000, Universität Hannover}, editor = {Kolditz, O and {W. Zielke, P. Wriggers}, H.-J. Dürbaum & M. Wallner}, month = {11}, note = {, IWS2ID=124 , Institution: Institut für Strömungsmechanik und Elektronisches Rechnen im Bauwesen , Address: Universität Hannover }, number = 60, page = {241-255}, title = {Mehrgittermethoden und adaptive Diskretisierungsverfahren zur Simulation von Strömungs- und Transportprozessen in Kluftaquiferen}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hannover00.ps.gz}, year = 2000 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hannover00.ps.gz
58. Sheta, H., & Helmig, R. (2000, Dezember). Simulation of multiphase flow processes in porous media considering hysteresis effects.
  - BibTeX
  BibTeX
  @inproceedings{Sheta:2000b, author = {Sheta, Hussam and Helmig, Rainer}, month = {12}, note = {, IWS2ID=128 }, title = {Simulation of multiphase flow processes in porous media considering hysteresis effects}, year = 2000 }
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 (Hrsg.), 3. Workshop Kluftaquifere „‚Gekoppelte Prozesse in Geosystemen‘“, 02.11.2000 - 03.11.2000, Universität Hannover (No. 60; Nummer 60).
  - BibTeX
  BibTeX
  @inproceedings{Jakobs:2000, author = {Jakobs, Hartmut and Helmig, Rainer}, booktitle = {3. Workshop Kluftaquifere ''Gekoppelte Prozesse in Geosystemen'', 02.11.2000 - 03.11.2000, Universität Hannover}, editor = {Kolditz, O and {W. Zielke, P. Wriggers}, H.-J. Dürbaum & M. Wallner}, month = {11}, note = {, IWS2ID=135 , Institution: Institut für Strömungsmechanik und Elektronisches Rechnen im Bauwesen , Address: Universität Hannover }, number = 60, page = {267-278}, title = {Gas Water Processes in Fractured Porous Media - Comparison of Different Upscaling Methods}, year = 2000 }
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 (Hrsg.), Groundwater Updates. Springer-Verlag. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/workshop.ps.gz
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  - Link
  BibTeX
  @inproceedings{Helmig:2000a, author = {Helmig, Rainer and Ewing, Richard E. and Hinkelmann, Reinhard and Finsterle, Steffan}, booktitle = {Groundwater Updates}, editor = {Sato, K. & Y. Iwasa}, month = {12}, note = {, IWS2ID=118 , Address: Tokyo, Berlin, New York }, page = {477-480}, publisher = {Springer-Verlag}, title = {Technical Workshop: Modeling of Flow and Transport Processes in the Subsurface}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/workshop.ps.gz}, year = 2000 }
  Link
  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 (Hrsg.), 3. Workshop Kluftaquifere „‚Gekoppelte Prozesse in Geosystemen‘“, 02.11.2000 - 03.11.2000, Universität Hannover (No. 60; Nummer 60).
  - BibTeX
  BibTeX
  @inproceedings{Hemminger:2000, author = {Hemminger, Annette and Neunhäuserer, Lina and Helmig, Rainer}, booktitle = {3. Workshop Kluftaquifere ''Gekoppelte Prozesse in Geosystemen'', 02.11.2000 - 03.11.2000, Universität Hannover}, editor = {Kolditz, O and {W. Zielke, P. Wriggers}, H.-J. Dürbaum & M. Wallner}, month = {11}, note = {, IWS2ID=189 , Institution: Institut für Strömungsmechanik und Elektronisches Rechnen im Bauwesen , Address: Universität Hannover }, number = 60, page = {51-64}, title = {Festgestein-Aquiferanalog: Experimente und Modellierung, Teilprojekt 3: Einsatz von diskreten Modellansätzen}, year = 2000 }
62. Helmig, R., Hinkelmann, R., & Menzel, K. (1999, Dezember). Numerische Methoden und Informationsverarbeitung am Beispiel der Hydrosystemmodellierung. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/MitBI.ps.gz
  - BibTeX
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  @inproceedings{Helmig:1999b, author = {Helmig, Rainer and Hinkelmann, Reinhard and Menzel, Karsten}, month = {12}, note = {Schwerpunktheft Informatik, IWS2ID=105 , Address: Technische Universität Braunschweig }, page = {106-111}, publisher = {CAROLO-WILHELMINA Mitteilungen}, title = {Numerische Methoden und Informationsverarbeitung am Beispiel der Hydrosystemmodellierung}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/MitBI.ps.gz}, year = 1999 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/MitBI.ps.gz
63. Helmig, R., Hinkelmann, R., & Troisi, S. (1999, Dezember). 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
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  - Link
  BibTeX
  @inproceedings{Helmig:1999a, author = {Helmig, Rainer and Hinkelmann, Reinhard and Troisi, Salvatore}, booktitle = {International Symposium - The Learning Society and the Water Environment}, month = {12}, note = {, IWS2ID=106 , Address: Paris, France }, title = {Groundwater: An Interdisciplinary Challenge for Continuing Education and Training on an European Scale}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/Paris-Paper-color.zip}, year = 1999 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/Paris-Paper-color.zip
64. Huber, R. U., & Helmig, R. (1999). Numerical Modelling of Multiphase-Multicomponent Systems in Porous Media. In V. & W. Keil, Mackens (Hrsg.), SCCE II (Bd. 1). Springer-Verlag.
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  BibTeX
  @inproceedings{Huber:1999b, author = {Huber, Ralf Uwe and Helmig, Rainer}, booktitle = {SCCE II}, editor = {{Keil, Mackens}, Voß & Werther}, month = {12}, note = {, IWS2ID=111 , Address: Technische Universität Hamburg-Harburg }, page = {247-254}, publisher = {Springer-Verlag}, title = {Numerical Modelling of Multiphase-Multicomponent Systems in Porous Media}, volume = 1, year = 1999 }
65. 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
  - BibTeX
  - Link
  BibTeX
  @inproceedings{Neunhaeuserer:1999, author = {Neunhäuserer, Lina and Hemminger, Annette and Helmig, Rainer}, booktitle = {28. IAHR Congress: Hydraulic Engineering for Sustainable Water Resources Management at the Turn of the Millennium, 22.08.1999 - 27.08.1999, Graz, Austria}, month = {08}, note = {(CD-ROM), IWS2ID=113 , Address: Graz, Austria }, title = {Influence of Fracture - Matrix - Interaction on Flow and Transport Processes and the Resulting Effective Parameters in Fractured Porous Systems}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/graz99.zip}, year = 1999 }
  Link
  http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/graz99.zip
66. Class, H., & Helmig, R. (1999, Oktober). Numerische Modellierung von thermisch unterstützter Bodenluftabsaugung. VEGAS Statuskolloquium, 12.10.2001, Universität Stuttgart.
  - BibTeX
  BibTeX
  @inproceedings{class1999numerische, author = {Class, Holger and Helmig, Rainer}, booktitle = {VEGAS Statuskolloquium, 12.10.2001, Universität Stuttgart}, month = {10}, note = {, date=01.10.1999, IWS2ID=1375 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, title = {Numerische Modellierung von thermisch unterstützter Bodenluftabsaugung}, year = 1999 }
67. Huber, R. U., & Helmig, R. (1999, Dezember). Simulation of Immiscible and Compositional Multiphase Flow in Heterogeneous Porous Media. AMIF Conference.
  - BibTeX
  BibTeX
  @inproceedings{Huber:1999a, author = {Huber, Ralf Uwe and Helmig, Rainer}, booktitle = {AMIF Conference}, month = {12}, note = {, IWS2ID=110 }, publisher = {Computing and Visualization in Science}, title = {Simulation of Immiscible and Compositional Multiphase Flow in Heterogeneous Porous Media}, year = 1999 }
68. 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 (Hrsg.), 3. International Conference on Hydroscience and Engineering, ICHE1998, Advances in Hydro-Science and -Engineering, 31.08.1998 - 03.09.1998, Cottbus (No. 3; Nummer 3). Center for Computational Hydroscience and Engineering. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/ICHE.ps.gz
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  BibTeX
  @inproceedings{Barlag:1998, author = {Barlag, Christine and Hinkelmann, Reinhard and Helmig, Rainer and Zielke, Werner}, booktitle = {3. International Conference on Hydroscience and Engineering, ICHE1998, Advances in Hydro-Science and -Engineering, 31.08.1998 - 03.09.1998, Cottbus}, editor = {Holz, K.P. and Bechteler, W and Wang, S.S.Y. & M. Kawahara}, month = {08}, note = {(CD-ROM), IWS2ID=73 , Address: University of Mississippi, USA }, number = 3, publisher = {Center for Computational Hydroscience and Engineering}, title = {Adaptive Methods for Modelling Transport Processes in Fractured Subsurface Systems}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/ICHE.ps.gz}, year = 1998 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/ICHE.ps.gz
69. Sheta, H., Hinkelmann, R., & Helmig, R. (1998, Dezember). 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
  - BibTeX
  - Link
  BibTeX
  @inproceedings{Sheta:1998b, author = {Sheta, Hussam and Hinkelmann, Reinhard and Helmig, Rainer}, booktitle = {International Symposium on Computer Methods for Engineering in Porous Media, Flow and Transport}, month = {12}, note = {, IWS2ID=97 , Address: Giens, France }, title = {Two-Phase Flow in Porous Media for Sharp Interface Problems}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/toulon.ps.gz}, year = 1998 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/toulon.ps.gz
70. 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 (Hrsg.), 3. International Conference on Hydroscience and Engineering, ICHE1998, Advances in Hydro-Science and -Engineering, 31.08.1998 - 03.09.1998, Cottbus (No. 3; Nummer 3). Center for Computational Hydroscience and Engineering.
  - BibTeX
  BibTeX
  @inproceedings{Hemminger:1998a, author = {Hemminger, Annette and Neunhäuserer, Lina and Bárdossy, András and Helmig, Rainer}, booktitle = {3. International Conference on Hydroscience and Engineering, ICHE1998, Advances in Hydro-Science and -Engineering, 31.08.1998 - 03.09.1998, Cottbus}, editor = {Holz, K.P. and Bechteler, W and Wang, S.S.Y. & M. Kawahara}, month = {08}, note = {(CD-ROM), IWS2ID=87 , Address: University of Mississippi, USA }, number = 3, page = {205}, publisher = {Center for Computational Hydroscience and Engineering}, title = {Identification of equivalent parameters on different scales in fractured-porous media}, year = 1998 }
71. Helmig, R., & Huber, R. U. (1998, Juni). 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.
  - BibTeX
  BibTeX
  @inproceedings{Helmig:1998a, author = {Helmig, Rainer and Huber, Ralf Uwe}, booktitle = {12. International Conference on Computational Methods in Water Resources, 15.06.1998 - 19.06.1998, Crete, Greece}, month = {06}, note = {, IWS2ID=81 , Address: Crete, Greece }, page = {75-82}, title = {Comparison of different discretization techniques for multiphase flow in heterogeneous media}, year = 1998 }
72. Allan, J., Ewing, J., Helmig, R., & Braun, J. (1998). Scale effects in multiphase flow modeling. In G. B. & R. E. H. Wickramanayake (Hrsg.), 1. International conference on remediation of chlorinated and recalcitrant compounds, 18.05.1998 - 21.05.1998, Monterey, California, USA. Battelle Press.
  - BibTeX
  BibTeX
  @inproceedings{Allan:1998, author = {Allan, Jane and Ewing, John and Helmig, Rainer and Braun, Jürgen}, booktitle = {1. International conference on remediation of chlorinated and recalcitrant compounds, 18.05.1998 - 21.05.1998, Monterey, California, USA}, editor = {Wickramanayake, G.B. & R.E. Hinchee}, month = {05}, note = {, IWS2ID=72 , Address: Columbus, OH, USA }, publisher = {Battelle Press}, title = {Scale effects in multiphase flow modeling}, year = 1998 }
73. Huber, R. U., & Helmig, R. (1998, Juni). 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.
  - BibTeX
  BibTeX
  @inproceedings{Huber:1998, author = {Huber, Ralf Uwe and Helmig, Rainer}, booktitle = {12. International Conference on Computational Methods in Water Resources, 15.06.1998 - 19.06.1998, Crete, Greece}, month = {06}, note = {, IWS2ID=91 , Address: Crete, Greece }, page = {35-42}, title = {Simulation of Immiscible and Compositional Multiphase Flow in Porous Media}, year = 1998 }
74. 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 (Hrsg.), International Conference on Radioactive Waste Disposal (Distec ’98), 09.09.1998 - 11.09.1998, Hamburg.
  - BibTeX
  BibTeX
  @inproceedings{Fein:1998, author = {Fein, Eckhard and Graefe, Volkmar and Kull, Herbert and Helmig, Rainer and Jakobs, Hartmut}, booktitle = {International Conference on Radioactive Waste Disposal (Distec '98), 09.09.1998 - 11.09.1998, Hamburg}, editor = {Roth, A and Kontec}, month = {09}, note = {, IWS2ID=79 , Address: Hamburg }, title = {Dependency of Hydraulic Flow Conditions on Rock Saturation around Repository Drifts}, year = 1998 }
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
  - BibTeX
  - Link
  BibTeX
  @inproceedings{Neunhaeuserer:1998, author = {Neunhäuserer, Lina and Fuchs, Alexander and Hemminger, Annette and Helmig, Rainer}, booktitle = {12. International Conference on Computational Methods in Water Resources, 15.06.1998 - 19.06.1998, Crete, Greece}, month = {06}, note = {, IWS2ID=94 , Address: Crete, Greece }, page = {101-108}, title = {Flow and transport processes in fractured porous media}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Kreta98.ps.gz}, volume = 2, year = 1998 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Kreta98.ps.gz
76. Braun, C., Hassanizadeh, S. M., & Helmig, R. (1998, Juni). 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.
  - BibTeX
  BibTeX
  @inproceedings{Braun:1998, author = {Braun, Christopherus and Hassanizadeh, S. Majid and Helmig, Rainer}, booktitle = {12. International Conference on Computational Methods in Water Resources, 15.06.1998 - 19.06.1998, Crete, Greece}, month = {06}, note = {, IWS2ID=75 , Address: Crete, Greece }, page = {43-50}, title = {Two-Phase Flow in Heterogeneous Porous Media - Effective Parameters and Constitutive Relationships}, year = 1998 }
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 (Hrsg.), 27. IAHR Congress: Water for a Changing Global Community, 10.08.1997 - 15.08.1997, San Francisco, USA. ASCE.
  - BibTeX
  BibTeX
  @inproceedings{Emmert:1997, author = {Emmert, Martin and Helmig, Rainer and Bächle, Werner}, booktitle = {27. IAHR Congress: Water for a Changing Global Community, 10.08.1997 - 15.08.1997, San Francisco, USA}, editor = {Holly, Jr and M. Forrest, et al.}, month = {08}, note = {, IWS2ID=59 , Address: San Francisco, USA }, publisher = {ASCE}, title = {Numerical Modelling of Steam Injection in a Vertical Sand-Filled Column}, year = 1997 }
78. Kumar, M. M., Helmig, R., & Hari, P. K. S. (1997, Dezember). Finite Analytic - Strongly Implicit Procedure for Variably Saturated Porous Media. Analytic Based Modeling of Groundwater Flow.
  - BibTeX
  BibTeX
  @inproceedings{Mohan:1997, author = {Kumar, Mohan M. and Helmig, Rainer and Hari, Prasad K. S.}, booktitle = {Analytic Based Modeling of Groundwater Flow}, month = {12}, note = {, IWS2ID=71 , Address: Bergen, The Netherlands }, title = {Finite Analytic - Strongly Implicit Procedure for Variably Saturated Porous Media}, year = 1997 }
79. Helmig, R., Jäger, W., Kinzelbach, W., & Knabner, P. (1997). Modeling and Computation in Environmental Sciences. In G. Wittum (Hrsg.), Notes on Numerical Fluid Mechanics (Bd. 59). Vieweg Verlag.
  - BibTeX
  BibTeX
  @inproceedings{Helmig:1997c, author = {Helmig, Rainer and Jäger, Willi and Kinzelbach, Wolfgang and Knabner, Peter}, booktitle = {Notes on Numerical Fluid Mechanics}, editor = {Wittum, G.}, isbn = {3-528-07659-7}, month = {12}, note = {, IWS2ID=63 , Address: Braunschweig }, page = {243}, publisher = {Vieweg Verlag}, title = {Modeling and Computation in Environmental Sciences}, volume = 59, year = 1997 }
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 (Hrsg.), Notes on Numerical Fluid Dynamics (No. 59; Nummer 59). Vieweg Verlag.
  - BibTeX
  BibTeX
  @inproceedings{Cirpka:1997b, author = {Cirpka, Olaf Arie and Helmig, Rainer}, booktitle = {Notes on Numerical Fluid Dynamics}, editor = {Helmig, R and {W. Jäger, W. Kinzelbach}, P. Knabner & G. Wittum}, month = {12}, note = {, IWS2ID=57 , Address: Braunschweig }, number = 59, page = {102-120}, publisher = {Vieweg Verlag}, title = {Comparison of approaches for coupling of chemistry to transport in groundwater systems}, year = 1997 }
81. Schäfer, G., Helmig, R., & Le Thiez, P. (1996, Dezember). Vergleich numerischer Methoden zur Simulation von LNAPL-Infiltrationsvorgängen in porösen Medien. Tagungsband ASIM ’96.
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  BibTeX
  @inproceedings{Schaefer:1996, author = {Schäfer, Gerhard and Helmig, Rainer and Le Thiez, Pierre}, booktitle = {Tagungsband ASIM '96}, month = {12}, note = {, IWS2ID=53 , Address: Dresden }, publisher = {Springer-Verlag}, title = {Vergleich numerischer Methoden zur Simulation von LNAPL-Infiltrationsvorgängen in porösen Medien}, year = 1996 }
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 (Hrsg.), 2. International Conference on Hydroinformatics 1996, 09.09.1996 - 13.09.1996, Zürich, Schweiz. A.A. Balkema Publishers.
  - BibTeX
  BibTeX
  @inproceedings{Helmig:1996e, author = {Helmig, Rainer and Bastian, Peter and Braun, Christopherus and Emmert, Martin and Huber, Ralf Uwe and Sheta, Hussam}, booktitle = {2. International Conference on Hydroinformatics 1996, 09.09.1996 - 13.09.1996, Zürich, Schweiz}, editor = {Müller, A.}, month = {09}, note = {, IWS2ID=45 }, publisher = {A.A. Balkema Publishers}, title = {Architecture of A Modular Program for Simulating Multiphase Flow and Transport Processes in Heterogeneous Media}, year = 1996 }
83. Helmig, R., Emmert, M., & Sheta, H. (1996, Dezember). Problem and Issues of Constitutive Relationships Needed for Accurate Modelling of Multiphase Flow in Heterogeneous Porous Media. Environmental Engineering.
  - BibTeX
  BibTeX
  @inproceedings{Helmig:1996b, author = {Helmig, Rainer and Emmert, Martin and Sheta, Hussam}, booktitle = {Environmental Engineering}, month = {12}, note = {, IWS2ID=42 , Address: Berlin, Heidelberg }, publisher = {Springer-Verlag}, title = {Problem and Issues of Constitutive Relationships Needed for Accurate Modelling of Multiphase Flow in Heterogeneous Porous Media}, year = 1996 }
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 (Hrsg.), Computing in Civil and Building Engineering (Bd. 2). A.A. Balkema Publishers.
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  BibTeX
  @inproceedings{Helmig:1995a, author = {Helmig, Rainer and Emmert, Martin and Sheta, Hussam}, booktitle = {Computing in Civil and Building Engineering}, editor = {Pahl, P.J. & H. Werner}, month = {12}, note = {, IWS2ID=27 , Address: Rotterdam, The Netherlands, Brookfield, USA }, page = {1193-1198}, publisher = {A.A. Balkema Publishers}, title = {Modelling of Multiphase Flow Processes in Heterogeneous Porous Media and Applications}, volume = 2, year = 1995 }
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.
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  BibTeX
  @inproceedings{Croise:1995c, author = {Croisé, Jean and Helmig, Rainer and Sheta, Hussam}, booktitle = {IAHS Publication}, month = {12}, note = {, IWS2ID=24 }, title = {Numerical Simulation of NAPL-infiltration and redistribution processes in unsaturated heterogeneous porous media, Groundwater Quality: Remediation and Protection (GQ 95)}, volume = 225, year = 1995 }
86. Helmig, R. (1995). Hydraulische Modellierung: analytische Verfahren und numerische Simulation der Grundwasserströmung und des Stofftransportes. DGG-Seminar Hydrologie und Geophysik, SonderbandIII, Article SonderbandIII.
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  BibTeX
  @inproceedings{Helmig:1995b, author = {Helmig, Rainer}, booktitle = {DGG-Seminar Hydrologie und Geophysik}, month = {12}, note = {, IWS2ID=28 , Address: Deutsche Geophysikalische Gesellschaft e.V. }, number = {SonderbandIII}, publisher = {Deutsche Geophysikalische Gesellschaft e.V.}, title = {Hydraulische Modellierung: analytische Verfahren und numerische Simulation der Grundwasserströmung und des Stofftransportes}, year = 1995 }
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.
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  BibTeX
  @inproceedings{Lang:1995, author = {Lang, Ulrich and Helmig, Rainer}, booktitle = {IAHS-Symposium on Groundwater Quality: Remediation and Protection, (GQ´95)}, month = {12}, note = {, IWS2ID=37 , Address: Prague, Czech Republic }, number = 255, publisher = {Ground Water}, title = {Numerical Modelling in Fractured Media - Identification of Measured Field Data}, year = 1995 }
88. Helmig, R. (1995, Februar). 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.
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  BibTeX
  @inproceedings{Helmig:1995c, author = {Helmig, Rainer}, booktitle = {3. SIAM Conference on Mathematical and Computational Issues in the Geosciences, 08.02.1995 - 10.02.1995, San Antonio, USA}, month = {02}, note = {, IWS2ID=29 , Address: San Antonio, USA }, title = {Mathematical Modeling and Simulation of Multiphase Processes in Heterogeneous Media with a Finite Element Method}, year = 1995 }
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.
  - BibTeX
  BibTeX
  @inproceedings{Croise:1995b, author = {Croisé, Jean and Helmig, Rainer and Le Thiez, Pierre and Schäfer, Gerhard}, booktitle = {12. Congrès Français de Mécanique, 04.09.1995 - 08.09.1995, Strasbourg, France}, month = {09}, note = {, IWS2ID=23 , Address: Strasbourg, France }, title = {Multiphase flow in porous media: Comparison of numerical simulators}, year = 1995 }
90. Betz, C., Emmert, M., Färber, A., Helmig, R., Kaleris, V., & Kobus, H. (1995, Dezember). Soil Remediation by Heat Injection: Experiments and Numerical Modelling. TOUGH Workshop Berkeley.
  - BibTeX
  BibTeX
  @inproceedings{Betz:1995, author = {Betz, Christoph and Emmert, Martin and Färber, Arne and Helmig, Rainer and Kaleris, Vassilios and Kobus, Helmut}, booktitle = {TOUGH Workshop Berkeley}, month = {12}, note = {, IWS2ID=21 , Institution: Lawrence Berkeley Laboratory , Address: University of California, Berkeley, USA }, page = {187-192}, title = {Soil Remediation by Heat Injection: Experiments and Numerical Modelling}, year = 1995 }
91. Helmig, R., Kobus, H., & Braun, C. (1994). Simulation and Interpretation of Multiphase Processes in Porous and Fractured-Porous Media. In A. Peters & others (Hrsg.), Numerical Methods in Water Resources (Bd. 2). Kluver Academic Publisher.
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  BibTeX
  @inproceedings{Helmig:1994d, author = {Helmig, Rainer and Kobus, Helmut and Braun, Christopherus}, booktitle = {Numerical Methods in Water Resources}, editor = {Peters, A. and others}, month = {12}, note = {, IWS2ID=17 , Address: Heidelberg }, page = {941-949}, publisher = {Kluver Academic Publisher}, title = {Simulation and Interpretation of Multiphase Processes in Porous and Fractured-Porous Media.}, volume = 2, year = 1994 }
92. Cirpka, O. A., & Helmig, R. (1994). Numerical Simulation of Contaminant Transport and Biodegradation in Porous and Fractured-Porous Media. In A. Peters & others (Hrsg.), Numerical Methods in Water Resources. Kluver Academic Publisher.
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  BibTeX
  @inproceedings{Cirpka:1994, author = {Cirpka, Olaf Arie and Helmig, Rainer}, booktitle = {Numerical Methods in Water Resources}, editor = {Peters, A. and others}, month = {12}, note = {, IWS2ID=13 , Address: Heidelberg }, page = {605-612}, publisher = {Kluver Academic Publisher}, title = {Numerical Simulation of Contaminant Transport and Biodegradation in Porous and Fractured-Porous Media}, year = 1994 }
93. Helmig, R. (1994). Modelling of Multiphase Flow in Discrete Fracture Systems with the Finite Element Method. In F. Dracos & Stauffer (Hrsg.), International Symposium on Transport and Reactive Processes in Aquifers. A.A. Balkema Publishers.
  - BibTeX
  BibTeX
  @inproceedings{Helmig:1994b, author = {Helmig, Rainer}, booktitle = {International Symposium on Transport and Reactive Processes in Aquifers}, editor = {Dracos & Stauffer, F.}, month = {04}, note = {, IWS2ID=15 , Address: Rotterdam, The Netherlands, Brookfield, USA }, publisher = {A.A. Balkema Publishers}, title = {Modelling of Multiphase Flow in Discrete Fracture Systems with the Finite Element Method}, year = 1994 }
94. Helmig, R., Braun, C., & Emmert, M. (1994, Dezember). The Application of the Finite Element Method for Modelling Multiphase Flow in Fractured-Porous Media. Journées Numérique de Besançon.
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  BibTeX
  @inproceedings{Helmig:1994c, author = {Helmig, Rainer and Braun, Christopherus and Emmert, Martin}, booktitle = {Journées Numérique de Besançon}, month = {12}, note = {, IWS2ID=16 }, publisher = {Longman Group UK Limited}, title = {The Application of the Finite Element Method for Modelling Multiphase Flow in Fractured-Porous Media}, year = 1994 }
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 (Hrsg.), Numerical Methods in Water Resources. Kluver Academic Publisher.
  - BibTeX
  BibTeX
  @inproceedings{Shao:1994, author = {Shao, Hua and Helmig, Rainer and Zielke, Werner}, booktitle = {Numerical Methods in Water Resources}, editor = {Peters, A. and others}, month = {12}, note = {, IWS2ID=20 , Address: Heidelberg }, publisher = {Kluver Academic Publisher}, title = {Simulation of Flow and Transport in Fractured-Porous Media with Coupling from FEM and BEM.}, year = 1994 }
96. Zielke, W., Helmig, R., Kröhn, K. P., Shao, H., & Wollrath, J. (1991, Dezember). Discrete Modelling of Transport Processes in Fractured Porous Rock. International Congress on Rock Mechanics.
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  BibTeX
  @inproceedings{Zielke:1991a, author = {Zielke, Werner and Helmig, Rainer and Kröhn, Klaus Peter and Shao, Hua and Wollrath, Jürgen}, booktitle = {International Congress on Rock Mechanics}, month = {12}, note = {, IWS2ID=3 , Address: Aachen }, title = {Discrete Modelling of Transport Processes in Fractured Porous Rock}, year = 1991 }
97. Zielke, W., & Helmig, R. (1991, Dezember). Grundwasserströmung und Schadstofftransport. FE-Methoden für klüftiges Gestein. Wissenschaftliche Tagung „‚Finite Elemente -Anwendungen in der Baupraxis‘“.
  - BibTeX
  BibTeX
  @inproceedings{Zielke:1991b, author = {Zielke, Werner and Helmig, Rainer}, booktitle = {Wissenschaftliche Tagung ''Finite Elemente -Anwendungen in der Baupraxis''}, month = {12}, note = {, IWS2ID=4 , Address: Universität Karlsruhe (TH) }, publisher = {Verlag Ernst & Sohn}, title = {Grundwasserströmung und Schadstofftransport. FE-Methoden für klüftiges Gestein.}, year = 1991 }
98. Helmig, R., Kröhn, K. P., & Zielke, W. (1991, März). Methoden zur Modellierung von Strömungs- und Transportprozessen in Felsaquiferen. 6. Wissenschaftliche Tagung Hydrologie und Wasserwirtschaft, 18.03.1991 - 20.03.1991, Universität Trier.
  - BibTeX
  BibTeX
  @inproceedings{Helmig:1991a, author = {Helmig, Rainer and Kröhn, Klaus Peter and Zielke, Werner}, booktitle = {6. Wissenschaftliche Tagung Hydrologie und Wasserwirtschaft, 18.03.1991 - 20.03.1991, Universität Trier}, month = {03}, note = {, IWS2ID=1 , Address: Universität Trier , Partnerinstitution: Institut für Computerphysik , Partneraddress: Universität Stuttgart }, title = {Methoden zur Modellierung von Strömungs- und Transportprozessen in Felsaquiferen}, year = 1991 }
Promotionen
1. Helmig, R. (1997). Gekoppelte Strömungs- und Transportprozesse im Untergrund: Ein Beitrag zur Hydrosystemmodellierung (Bd. 91) [Habilitationsschrift]. Universität Stuttgart, Institut für Wasserbau.
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  BibTeX
  @phdthesis{Helmig:1997d, author = {Helmig, Rainer}, isbn = {3-921694-91-7}, month = {12}, note = {vergriffen, IWS2ID=64 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, page = {255}, school = {Universität Stuttgart, Institut für Wasserbau}, title = {Gekoppelte Strömungs- und Transportprozesse im Untergrund: Ein Beitrag zur Hydrosystemmodellierung}, type = {Habilitationsschrift}, volume = 91, year = 1997 }
2. Helmig, R. (1993). Theorie und Numerik der Mehrphasenströmungen in geklüftet-porösen Medien (Promotionsschrift No. 34; Nummer 34). Universität Hannover, Institut für Strömungsmechanik und Elektronisches Rechnen im Bauwesen.
  - BibTeX
  BibTeX
  @phdthesis{Helmig:1993a, author = {Helmig, Rainer}, isbn = {0177-9028}, month = {12}, note = {, IWS2ID=6 , Institution: Institut für Strömungsmechanik und Elektronisches Rechnen im Bauwesen , Address: Universität Hannover }, number = 34, page = {186}, school = {Universität Hannover, Institut für Strömungsmechanik und Elektronisches Rechnen im Bauwesen}, title = {Theorie und Numerik der Mehrphasenströmungen in geklüftet-porösen Medien}, type = {Promotionsschrift}, year = 1993 }
Forschungsberichte
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 (Nos. 2017–1; Archive of Numerical Software, Nummern 2017–1). https://doi.org/10.18419/opus-9360
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  BibTeX
  @techreport{NULL, author = {Grüninger, Christoph and Fetzer, Thomas and Flemisch, Bernd and Helmig, Rainer}, doi = {10.18419/opus-9360}, journal = {Archive of Numerical Software}, month = {11}, note = {, IWS2ID=4391 }, number = {2017-1}, page = {16}, title = {Coupling DuMuX and DUNE-PDELab to investigate evaporation at the interface between Darcy and Navier-Stokes flow}, year = 2017 }
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, Bd. 48, Nummer W07519). https://doi.org/10.1029/2011WR011714
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  BibTeX
  @techreport{NULL, author = {Ebigbo, Anozie and Phillips, Adrienne and Gerlach, Robin and Helmig, Rainer and Cunningham, Alfred B. and Class, Holger and Spangler, Lee H.}, doi = {10.1029/2011WR011714}, journal = {Water Resources Research}, month = {07}, note = {, IWS2ID=2692 , Partnerinstitution: Montana State University }, number = {W07519}, title = {Darcy-scale modeling of microbially induced carbonate mineral precipitation in sand columns}, type = {Bericht}, volume = 48, year = 2012 }
3. Ebigbo, A., Class, H., & Helmig, R. (2008). Numerische Untersuchung zur CO2 Sequestrierung in geologischen Formationen - problemorientierte Benchmarks (Bericht No. 10_2008; Bd. LH218, Nummer 10_2008).
  - BibTeX
  BibTeX
  @techreport{NULL, author = {Ebigbo, Anozie and Class, Holger and Helmig, Rainer}, month = {05}, note = {, IWS2ID=2422 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {10_2008}, title = {Numerische Untersuchung zur CO2 Sequestrierung in geologischen Formationen - problemorientierte Benchmarks}, type = {Bericht}, volume = {LH218}, year = 2008 }
4. Kopp, A., Class, H., & Helmig, R. (2007). Treibhausgase in der Bodenfalle: Bd. 01_07 (Bericht No. 99; Nummer 99). UNI-Kurier. https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Stuttgarter-UniKurier-Nr99-pg54-Juni2007-Treibhausgase_in_der_Bodenfalle.pdf
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  - Link
  BibTeX
  @techreport{NULL, author = {Kopp, Andreas and Class, Holger and Helmig, Rainer}, month = {06}, note = {EU-Projekt CO2SINK: Numerische Simulation der Kohlendioxidspeicherung, IWS2ID=2145 , Address: Universität Stuttgart }, number = 99, page = {54}, publisher = {UNI-Kurier}, title = {Treibhausgase in der Bodenfalle}, type = {Bericht}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Stuttgarter-UniKurier-Nr99-pg54-Juni2007-Treibhausgase_in_der_Bodenfalle.pdf}, volume = {01_07}, year = 2007 }
  Link
  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 No. 16/2007; Bd. LH217, Nummer 16/2007).
  - BibTeX
  BibTeX
  @techreport{NULL, author = {Helmig, Rainer and Paul, Maren and Zimmer, Stefan and Brückner-Nieder, Uta and Hoffmann, Michael and Schumacher, Hermann and Lemmer, Uli}, month = {12}, note = {, IWS2ID=2421 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {16/2007}, title = {Abschlussbericht zum Projekt SULKA "Qualitätskonzept für internationale Studiengänge an den Universitäten Stuttgart, Ulm und Karlsruhe"}, type = {Bericht}, volume = {LH217}, year = 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 No. 09_2007; Bd. LH215, Nummer 09_2007). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/co2trap_wissenschaftlicher_bericht.pdf
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  @techreport{NULL, author = {Dogan, Mehmet Onur and Class, Holger and Helmig, Rainer}, month = {07}, note = {, IWS2ID=2419 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {09_2007}, title = {Numerische Modellierung von Mehrphasenströmungs- und Transportprozessen bei der Sequestrierung von CO2 in geologischen Formationen}, type = {Bericht}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/co2trap_wissenschaftlicher_bericht.pdf}, volume = {LH215}, year = 2007 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/co2trap_wissenschaftlicher_bericht.pdf
7. Niessner, J., & Helmig, R. (2006). Multi-scale modeling of two-phase - two-component processes in heterogeneous porous media (Bericht No. 2006/02; Nummer 2006/02).
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  BibTeX
  @techreport{NULL, author = {Niessner, Jennifer and Helmig, Rainer}, month = {12}, note = {SFB preprint, IWS2ID=1821 }, number = {2006/02}, title = {Multi-scale modeling of two-phase - two-component processes in heterogeneous porous media}, type = {Bericht}, year = 2006 }
8. Helmig, R., Class, H., Ölmann, U., & Niessner, J. (2006). Multiphase Processes in Porous Media. In R. Helmig & B. Mielke, Alexanderand Wohlmuth (Hrsg.), Multifield Problems in Solid and Fluid Mechanics (Bericht No. 28; Multifield Problems in Solid and Fluid Mechanics, Nummer 28). Springer-Verlag.
  - BibTeX
  BibTeX
  @techreport{NULL, author = {Helmig, Rainer and Class, Holger and Ölmann, Ulrich and Niessner, Jennifer}, booktitle = {Multifield Problems in Solid and Fluid Mechanics}, editor = {Helmig, Rainer and {Mielke, Alexanderand Wohlmuth}, Barbara}, month = {09}, note = {, IWS2ID=1934 }, number = 28, page = {45-82}, publisher = {Springer-Verlag}, title = {Multiphase Processes in Porous Media}, type = {Bericht}, year = 2006 }
9. 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 No. 02_2006; Bd. LH212, Nummer 02_2006).
  - BibTeX
  BibTeX
  @techreport{NULL, author = {Paul, Maren and Helmig, Rainer and Hoffmann, Michael and Brückner-Nieder, Uta and Zimmer, Stefan}, month = {01}, note = {, IWS2ID=2416 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {02_2006}, title = {Zwischenbericht zum Projekt SULKA "Qualitätskonzept für internationale Studiengänge an den Universitäten Stuttgart, Ulm und Karlsruhe"}, type = {Bericht}, volume = {LH212}, year = 2006 }
10. Kopp, A., Sheta, H., & Helmig, R. (2005). Parameterstudie zur Abschätzung erzielbarer Methangasmengen aus Gasproduktionsbohrungen mit Hilfe zweidimensionaler Strömungsmodellierung (Bericht No. 2005/10; Bd. LH207, Nummer 2005/10).
  - BibTeX
  BibTeX
  @techreport{kopp2005parameterstudie, author = {Kopp, Andreas and Sheta, Hussam and Helmig, Rainer}, month = {03}, note = {, IWS2ID=1690 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {2005/10}, title = {Parameterstudie zur Abschätzung erzielbarer Methangasmengen aus Gasproduktionsbohrungen mit Hilfe zweidimensionaler Strömungsmodellierung}, type = {Bericht}, volume = {LH207}, year = 2005 }
11. 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
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  - Link
  BibTeX
  @techreport{NULL, author = {Assteerawatt, Anongnart and Bastian, Peter and Bielinski, Andreas and Breiting, Thomas and Class, Holger and Ebigbo, Anozie and Eichel, Hartmut and Freiboth, Sandra and Helmig, Rainer and Kopp, Andreas and Niessner, Jennifer and Ochs, Steffen Oliver and Papafotiou, Alexandros and Paul, Maren and Sheta, Hussam and Ölmann, Ulrich}, month = {10}, note = {Volume XXIII ISSUE 2, IWS2ID=1785 , Institution: International Groundwater Modeling Centre, Colorado School of Mine }, title = {MUFTE-UG: Structure, Applications andNumerical Methods}, type = {Bericht}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/IGWMC_newsletter_MUFTE.pdf}, year = 2005 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/IGWMC_newsletter_MUFTE.pdf
12. 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
  - BibTeX
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  BibTeX
  @techreport{Neunhaeuserer:2004, author = {Neunhäuserer, Lina and Gebauer, Susanna and Ochs, Steffen Oliver and Hinkelmann, Reinhard and Kornhuber, Ralf and Helmig, Rainer}, month = {03}, note = {Hi640/1-3 und Ko1806/2-3, IWS2ID=671 , Institution: Institut für Wasserbau , Address: Universität Stuttgart , Partnerinstitution: Fachbereich Mathematik und Informatik, Institut für Mathematik II , Partneraddress: Freie Universität Berlin }, title = {Mehrgittermethoden und adaptive Euler-Lagrange-Verfahren zur Simulation von Strömungs- und Transportvorgängen in Kluftaquifersystemen}, type = {Bericht}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/bericht_dfg_04.pdf}, year = 2004 }
  Link
  https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/bericht_dfg_04.pdf
13. Sheta, H., Breiting, T., Hinkelmann, R., & Helmig, R. (2004). Dreidimensionale Modellierung von Methanmigrationsprozessen im Untergrund (Bericht No. 2004/03; Bd. LH202, Nummer 2004/03).
  - BibTeX
  BibTeX
  @techreport{sheta2004dreidimensionale, author = {Sheta, Hussam and Breiting, Thomas and Hinkelmann, Reinhard and Helmig, Rainer}, month = {03}, note = {, IWS2ID=813 , Institution: Institut für Wasserbau, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung , Address: Universität Stuttgart }, number = {2004/03}, title = {Dreidimensionale Modellierung von Methanmigrationsprozessen im Untergrund}, type = {Bericht}, volume = {LH202}, year = 2004 }
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 No. 2004/11; Bd. LH203, Nummer 2004/11).
  - BibTeX
  BibTeX
  @techreport{breiting2004assessment, author = {Breiting, Thomas and Sheta, Hussam and Kobayashi, Kenichiro and Hinkelmann, Reinhard and Helmig, Rainer}, month = {05}, note = {Abschlußbericht (01.10.2000-31.04.2004), IWS2ID=814 , Institution: Institut für Wasserbau, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung , Address: Universität Stuttgart }, number = {2004/11}, title = {Assessment of hazardous gas emission to the surface over former mined areas}, type = {Bericht}, volume = {LH203}, year = 2004 }
15. 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 (Bd. 130) [Mitteilungsheft].
  - BibTeX
  BibTeX
  @techreport{reichenberger2004complex, author = {Reichenberger, Volker and Jakobs, Hartmut and Bastian, Peter and Helmig, Rainer and Niessner, Jennifer}, month = {12}, note = {, IWS2ID=1144 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, title = {Complex Gas-Water Processes in Discrete Fracture-Matrix Systems. Upscaling, Mass-Conservative Discretization and Efficient Multilevel Solution and Efficient Multilevel Solution}, type = {Mitteilungsheft}, volume = 130, year = 2004 }
16. Reichenberger, V., Jakobs, H., Bastian, P., & Helmig, R. (2004). A mixed-dimensional finite volume method for multiphase flow in fractured porous media (0 Nos. 2004–19; Nummern 2004–19). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Preprint2004-19.pdf
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  - Link
  BibTeX
  @techreport{reichenberger2004mixeddimensional, author = {Reichenberger, Volker and Jakobs, Hartmut and Bastian, Peter and Helmig, Rainer}, month = {12}, note = {, IWS2ID=808 , Institution: Interdisziplinäres Zentrum für wissenschaftliches Rechnen (IWR) , Address: Heidelberg }, number = {2004-19}, title = {A mixed-dimensional finite volume method for multiphase flow in fractured porous media}, type = 0, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/Preprint2004-19.pdf}, year = 2004 }
  Link
  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 No. RR-4903; Nummer RR-4903). https://www.inria.fr/rrrt/rr-4903.html
  - BibTeX
  - Link
  BibTeX
  @techreport{Niessner:2003, author = {Niessner, Jennifer and Roberts, Jean and Helmig, Rainer}, month = {12}, note = {, IWS2ID=585 , Institution: Institut National de Recherche en Informatique et en Automatique (INRIA) , Address: Rocquencourt - Paris, France }, number = {RR-4903}, title = {Influence of an Interface Condition and Exact Linearization in the Newton Iterations for Two-Phase Flow in Heterogeneous Porous Media}, type = {Bericht}, url = {https://www.inria.fr/rrrt/rr-4903.html}, year = 2003 }
  Link
  https://www.inria.fr/rrrt/rr-4903.html
18. Ochs, S. O., Hinkelmann, R., & Helmig, R. (2003). Numerische Simulation von Gaspumpversuchen im Untergrund [Bericht].
  - BibTeX
  BibTeX
  @techreport{Ochs:2003, author = {Ochs, Steffen Oliver and Hinkelmann, Reinhard and Helmig, Rainer}, month = {12}, note = {, IWS2ID=670 , Institution: Institut für Wasserbau, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung , Address: Universität Stuttgart }, title = {Numerische Simulation von Gaspumpversuchen im Untergrund}, type = {Bericht}, year = 2003 }
19. Helmig, R., & Hinkelmann, R. (2003). Plausibilitätsprüfung zur Modellstudie Elbe [Gutachten].
  - BibTeX
  BibTeX
  @techreport{Helmig:2003a, author = {Helmig, Rainer and Hinkelmann, Reinhard}, month = {12}, note = {, IWS2ID=643 , Institution: Institut für Wasserbau, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung , Address: Universität Stuttgart }, title = {Plausibilitätsprüfung zur Modellstudie Elbe}, type = {Gutachten}, year = 2003 }
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 No. 02_2002; Nummer 02_2002).
  - BibTeX
  BibTeX
  @techreport{subhendu:2002, author = {Hazra, Subhendu Bikash and Class, Holger and Helmig, Rainer and Schulz, Volker}, month = {12}, note = {, IWS2ID=797 , Institution: Fachbereich IV - Mathematik , Address: Universität Trier }, number = {02_2002}, title = {Forward and Inverse Problems in Modeling of Multiphase Flow and Transport Through Porous Media}, type = {Bericht}, year = 2002 }
21. Akuzun, S., Kobus, H., & Helmig, R. (2001). Parameteridentifikation für Doppelkontinuum-Modelle: Interpretation von Aquifertests in Karstaquiferen anhand synthetischer lokaler Kluftmmodelle (Bericht No. 2001/06; Bd. HG281, Nummer 2001/06).
  - BibTeX
  BibTeX
  @techreport{Akuzun:2001, author = {Akuzun, Sener and Kobus, Helmut and Helmig, Rainer}, month = {10}, note = {Projektzeitraum: 10.1996-8.2001, IWS2ID=875 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {2001/06}, title = {Parameteridentifikation für Doppelkontinuum-Modelle: Interpretation von Aquifertests in Karstaquiferen anhand synthetischer lokaler Kluftmmodelle}, type = {Bericht}, volume = {HG281}, year = 2001 }
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
  - BibTeX
  - Link
  BibTeX
  @techreport{Kaleris:2001, author = {Kaleris, Vassilios and Lagas, George and Sheta, Hussam and Hinkelmann, Reinhard and Helmig, Rainer}, month = {12}, note = {(Final Report), IWS2ID=138 }, title = {Task8: Groundwater Flow Modelling}, type = {Bericht}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/Finalreport_01.zip}, year = 2001 }
  Link
  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 No. Hi640/1-1undKo1806/2-1; Nummer Hi640/1-1undKo1806/2-1). http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/bericht01.ps.gz
  - BibTeX
  - Link
  BibTeX
  @techreport{dfg_adap:2001, author = {Neunhäuserer, Lina and Gebauer, Susanna and Ochs, Steffen Oliver and Hinkelmann, Reinhard and Kornhuber, Ralf and Helmig, Rainer}, month = {12}, note = {01/2000 - 07/2001, IWS2ID=134 , Institution: Institut für Wasserbau, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung , Address: Universität Stuttgart , Partnerinstitution: Fachbereich Mathematik und Informatik, Institut für Mathematik II , Partneraddress: Freie Universität Berlin }, number = {Hi640/1-1undKo1806/2-1}, title = {Mehrgittermethoden und adaptive Euler-Lagrange-Verfahren zur Simulation von Strömungs- und Transportvorgängen in Kluftaquifersystemen}, type = {Bericht}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/bericht01.ps.gz}, year = 2001 }
  Link
  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
  - BibTeX
  - Link
  BibTeX
  @techreport{Kaleris:2000, author = {Kaleris, Vassilios and Lagas, George and Stroskidu, Vassilia and Sheta, Hussam and Hinkelmann, Reinhard and Helmig, Rainer}, month = {12}, note = {(End of Year 2), IWS2ID=122 }, title = {Task8: Groundwater Flow Modelling}, type = {Bericht}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/TASK8_AR1999.zip}, year = 2000 }
  Link
  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 No. He2531/1-2,He2531/1-3; Nummer He2531/1-2,He2531/1-3).
  - BibTeX
  BibTeX
  @techreport{dfgtp3_ber2:2000, author = {Neunhäuserer, Lina and Hemminger, Annette and Helmig, Rainer}, month = {12}, note = {11/1997 - 03/2000, IWS2ID=117 , Institution: Institut für ComputerAnwendungen im Bauingenieurwesen , Address: Technische Universität Braunschweig }, number = {He2531/1-2,He2531/1-3}, title = {Festgestein-Aquiferanalog: Experimente und Modellierung, Teilprojekt 3: Einsatz von diskreten Modellansätzen}, type = {Bericht}, year = 2000 }
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
  - BibTeX
  - Link
  BibTeX
  @techreport{Breiting:2000c, author = {Breiting, Thomas and Hinkelmann, Reinhard and Helmig, Rainer}, month = {12}, note = {, IWS2ID=139 , Institution: Institut für ComputerAnwendungen im Bauingenieurwesen , Address: Technische Universität Braunschweig }, title = {Modellierung und Analyse von Mehrphasenprozessen zur Simulation von Methanausgasung im Untergrund}, type = {Bericht}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/dmt_01.ps.gz}, year = 2000 }
  Link
  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].
  - BibTeX
  BibTeX
  @techreport{Helmig:2000b, author = {Helmig, Rainer and Bastian, Peter and Jakobs, Hartmut and Reichenberger, Volker}, booktitle = {BMWi - BmBF - Unterauftrag zum Vorhaben 02 E 9027 8}, month = {12}, note = {, IWS2ID=123 , Institution: Institut für ComputerAnwendungen im Bauingenieurwesen , Address: Technische Universität Braunschweig }, title = {Multiphase Multicomponent Processes in Fractured Porous Media}, type = {Bericht}, year = 2000 }
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
  - BibTeX
  - Link
  BibTeX
  @techreport{Kaleris:1999, author = {Kaleris, Vassilios and Sachinis, George and Sheta, Hussam and Hinkelmann, Reinhard and Helmig, Rainer}, month = {12}, note = {(End of Year 1), IWS2ID=112 }, title = {Task8: Groundwater Flow Modelling}, type = {Bericht}, url = {http://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/hinkelmann/Task8_99.zip}, year = 1999 }
  Link
  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].
  - BibTeX
  BibTeX
  @techreport{Sheta:1998a, author = {Sheta, Hussam and Class, Holger and Helmig, Rainer}, booktitle = {PWAB-Statuskolloquium, 17.03.1998 - 18.03.1998, Karlsruhe}, month = {03}, note = {, date=17.03.1998, IWS2ID=96 , Institution: Forschungszentrum Karlsruhe (FZK) , Address: Karlsruhe }, title = {Numerische Simulation von isothermen/ nichtisothermen Mehrphasenströmungen unter Berücksichtigung der Veränderung der Fluideigenschaften}, type = {Bericht}, year = 1998 }
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; Nummer 3).
  - BibTeX
  BibTeX
  @techreport{Helmig:1998f, author = {Helmig, Rainer and Färber, Arne and Class, Holger and Emmert, Martin}, month = {01}, note = {, IWS2ID=86 , Institution: Fachgebiet für Numerische Methoden und Informationsverarbeitung , Address: Technische Universität Braunschweig }, number = 3, title = {Heat Transport in the Unsaturated Zone - Comparison of Experimental Results and Numerical Simulations}, type = {Bericht}, year = 1998 }
31. Nanou-Giannarou, K., & Helmig, R. (1998). Simulation of 3D-Groundwater Flow with Free Surface (Bericht No. 4; Nummer 4). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/bericht4.zip
  - BibTeX
  - Link
  BibTeX
  @techreport{Nanou:1998, author = {Nanou-Giannarou, Katy and Helmig, Rainer}, month = {06}, note = {, IWS2ID=93 , Institution: Institut für ComputerAnwendungen im Bauingenieurwesen , Address: Technische Universität Braunschweig }, number = 4, title = {Simulation of 3D-Groundwater Flow with Free Surface}, type = {Bericht}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/bericht4.zip}, year = 1998 }
  Link
  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 Nos. 1,He2531/1-1; Nummern 1,He2531/1-1).
  - BibTeX
  BibTeX
  @techreport{dfgtp3_ber1:1997, author = {Neunhäuserer, Lina and Hemminger, Annette and Helmig, Rainer}, month = {12}, note = {05/1996 - 10/1997, IWS2ID=58 , Institution: Institut für Wasserbau , Address: Universität Stuttgart , Partnerinstitution: Fachgebiet für Numerische Methoden und Informationsverarbeitung , Partneraddress: Technische Universität Braunschweig }, number = {1,He2531/1-1}, title = {Festgestein-Aquiferanalog: Experimente und Modellierung, Teilprojekt 3: Einsatz von diskreten Modellansätzen}, type = {Bericht}, year = 1997 }
33. Huber, R. U., & Helmig, R. (1997). Investigation and Simulation of Three-Phase Flow in Porous Media (Bericht No. 2; Nummer 2). https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/helmig/bericht2.ps.gz
  - BibTeX
  - Link
  BibTeX
  @techreport{Huber:1997, author = {Huber, Ralf Uwe and Helmig, Rainer}, month = {12}, note = {, IWS2ID=70 , Institution: Fachgebiet für Numerische Methoden und Informationsverarbeitung , Address: Technische Universität Braunschweig }, number = 2, title = {Investigation and Simulation of Three-Phase Flow in Porous Media}, type = {Bericht}, url = {https://www.iws.uni-stuttgart.de/publikationen/hydrosys/paper/helmig/bericht2.ps.gz}, year = 1997 }
  Link
  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].
  - BibTeX
  BibTeX
  @techreport{Helmig:1997e, author = {Helmig, Rainer and Bastian, Peter}, month = {12}, note = {, IWS2ID=65 , Institution: Sonderforschungsbereich 404, Mehrfeldprobleme in der Kontinuumsmechanik , Address: Universität Stuttgart }, title = {Fully-Coupled Solution Techniques for Two Phase Flow in Porous Media. Comparison and Verification}, type = {Bericht}, year = 1997 }
35. Cirpka, O. A., Helmig, R., & Frind, E. O. (1997). Numerical Methods for Reactive Transport on Rectangular and Streamline-Oriented Grids [Bericht].
  - BibTeX
  BibTeX
  @techreport{Cirpka:1997a, author = {Cirpka, Olaf Arie and Helmig, Rainer and Frind, Emil O.}, month = {12}, note = {, IWS2ID=56 , Institution: Sonderforschungsbereich 404, Mehrfeldprobleme in der Kontinuumsmechanik , Address: Universität Stuttgart }, title = {Numerical Methods for Reactive Transport on Rectangular and Streamline-Oriented Grids}, type = {Bericht}, year = 1997 }
36. Brevdo, L., Helmig, R., & Kirchgässner, K. (1997). Permanent Fronts in Two-Phase Flows in a Porous Medium [Bericht].
  - BibTeX
  BibTeX
  @techreport{Brevdo:1997, author = {Brevdo, Leonid and Helmig, Rainer and Kirchgässner, Klaus}, month = {12}, note = {, IWS2ID=55 , Institution: Sonderforschungsbereich 404, Mehrfeldprobleme in der Kontinuumsmechanik , Address: Universität Stuttgart }, title = {Permanent Fronts in Two-Phase Flows in a Porous Medium}, type = {Bericht}, year = 1997 }
37. Emmert, M., Class, H., & Helmig, R. (1997). Numerische Simulation von isothermen/nichtisothermen Mehrphasenprozessen unter Berücksichtigung der Veränderung der Fluideigenschaften (modular aufgebautes Modellsystem) (Bericht No. 1997/16; Bd. HG249, Nummer 1997/16).
  - BibTeX
  BibTeX
  @techreport{emmert1997numerische, author = {Emmert, Martin and Class, Holger and Helmig, Rainer}, month = {10}, note = {Abschlußbericht, IWS2ID=960 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {1997/16}, title = {Numerische Simulation von isothermen/nichtisothermen Mehrphasenprozessen unter Berücksichtigung der Veränderung der Fluideigenschaften (modular aufgebautes Modellsystem)}, type = {Bericht}, volume = {HG249}, year = 1997 }
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].
  - BibTeX
  BibTeX
  @techreport{Huber:1996a, author = {Huber, Ralf Uwe and Helmig, Rainer}, month = {12}, note = {, IWS2ID=50 , Institution: Sonderforschungsbereich 404, Mehrfeldprobleme in der Kontinuumsmechanik , Address: Universität Stuttgart }, title = {Multiphase Flow in Heterogeneous Porous Media: a Classical Finite Element Method Versus an IMPES-Based Mixed FE/FV Approach}, type = {Bericht}, year = 1996 }
39. Lang, U., Rademacher, S., Helmig, R., & Kobus, H. (1996). Parameteridentifikation für Doppelkontinuums-Modelle - Interpretation von Grundwasserständen in Karstaquiferen anhand synthetischer lokaler Kluftmodelle (Bericht No. 1996/06; Bd. HG228, Nummer 1996/06).
  - BibTeX
  BibTeX
  @techreport{Lang:1996, author = {Lang, Ulrich and Rademacher, Silke and Helmig, Rainer and Kobus, Helmut}, month = {03}, note = {Abschlußbericht, IWS2ID=52 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {1996/06}, title = {Parameteridentifikation für Doppelkontinuums-Modelle - Interpretation von Grundwasserständen in Karstaquiferen anhand synthetischer lokaler Kluftmodelle}, type = {Bericht}, volume = {HG228}, year = 1996 }
40. Bastian, P., Helmig, R., Huber, R. U., & Braun, C. (1996). Modelling and efficient solution technique for multiphase flow in porous media [Bericht].
  - BibTeX
  BibTeX
  @techreport{Bastian:1996, author = {Bastian, Peter and Helmig, Rainer and Huber, Ralf Uwe and Braun, Christopherus}, month = {12}, note = {, IWS2ID=39 , Institution: Sonderforschungsbereich 404, Mehrfeldprobleme in der Kontinuumsmechanik , Address: Universität Stuttgart }, title = {Modelling and efficient solution technique for multiphase flow in porous media}, type = {Bericht}, year = 1996 }
41. Helmig, R., & Huber, R. U. (1996). Comparison of Galerkin-Type Discretization Techniques for Two-Phase Flow in Heterogeneous Porous Media (Bericht No. 96/11; Nummer 96/11).
  - BibTeX
  BibTeX
  @techreport{Helmig:1996d, author = {Helmig, Rainer and Huber, Ralf Uwe}, month = {12}, note = {, IWS2ID=44 , Institution: Sonderforschungsbereich 404, Mehrfeldprobleme in der Kontinuumsmechanik , Address: Universität Stuttgart }, number = {96/11}, title = {Comparison of Galerkin-Type Discretization Techniques for Two-Phase Flow in Heterogeneous Porous Media}, type = {Bericht}, year = 1996 }
42. Emmert, M., Bächle, W., & Helmig, R. (1996). Numerische Simulation von isothermen / nichtisothermen Mehrphasenprozessen unter Berücksichtigung der Veränderung der Fluideigenschaften (modular aufgebautes Modellsystem) (Bericht No. 1996/05; Bd. HG227, Nummer 1996/05).
  - BibTeX
  BibTeX
  @techreport{Emmert:1996, author = {Emmert, Martin and Bächle, Werner and Helmig, Rainer}, month = {04}, note = {2. Zwischenbericht, IWS2ID=41 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {1996/05}, title = {Numerische Simulation von isothermen / nichtisothermen Mehrphasenprozessen unter Berücksichtigung der Veränderung der Fluideigenschaften (modular aufgebautes Modellsystem)}, type = {Bericht}, volume = {HG227}, year = 1996 }
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 No. 1995/07; Bd. HG216, Nummer 1995/07).
  - BibTeX
  BibTeX
  @techreport{Emmert:1995b, author = {Emmert, Martin and Helmig, Rainer}, month = {05}, note = {1. Zwischenbericht, IWS2ID=26 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {1995/07}, title = {Numerische Simulation von iso-thermen-/nicht-isothermen Mehrphasenprozessen unter Berücksichtigung der Veränderung der Fluid-eigenschaften (modular aufgebautes Modellsystem)}, type = {Bericht}, volume = {HG216}, year = 1995 }
44. Emmert, M., Pruess, K., & Helmig, R. (1995). Preliminary Studies of Thermally Enhanced Soil Vapor Extraction (Bericht No. DE-AC-03-76SF00098; Nummer DE-AC-03-76SF00098).
  - BibTeX
  BibTeX
  @techreport{Emmert:1995a, author = {Emmert, Martin and Pruess, Karsten and Helmig, Rainer}, month = {12}, note = {, IWS2ID=25 , Institution: Lawrence Berkeley Laboratory , Address: University of California, Berkeley, USA }, number = {DE-AC-03-76SF00098}, title = {Preliminary Studies of Thermally Enhanced Soil Vapor Extraction}, type = {Bericht}, year = 1995 }
45. Croisé, J., Helmig, R., & Sheta, H. (1995). Numerische Modellierung von NAPL-Infiltrations-vorgängen in Lockergesteinen (Bericht No. 1995/01; Bd. HG214, Nummer 1995/01).
  - BibTeX
  BibTeX
  @techreport{Croise:1995a, author = {Croisé, Jean and Helmig, Rainer and Sheta, Hussam}, month = {03}, note = {, IWS2ID=22 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {1995/01}, title = {Numerische Modellierung von NAPL-Infiltrations-vorgängen in Lockergesteinen}, type = {Bericht}, volume = {HG214}, year = 1995 }
46. Braun, C., Helmig, R., & Kobus, H. (1994). Untersuchung zur Grundwassergefährdung durch die Erweiterung der Kläranlage Tübingen (Bericht No. 1994/08; Bd. HG199, Nummer 1994/08).
  - BibTeX
  BibTeX
  @techreport{Braun:1994a, author = {Braun, Christopherus and Helmig, Rainer and Kobus, Helmut}, month = {05}, note = {, IWS2ID=10 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {1994/08}, title = {Untersuchung zur Grundwassergefährdung durch die Erweiterung der Kläranlage Tübingen}, type = {Bericht}, volume = {HG199}, year = 1994 }
47. Braun, C., Helmig, R., Kobus, H., & Sheta, H. (1994). Untersuchung zu den Auswirkungen der Erhöhung der Förderleistung der Trinkwasserbrunnen im unteren Neckertal (Bericht No. 1994/09; Bd. HG200, Nummer 1994/09).
  - BibTeX
  BibTeX
  @techreport{Braun:1994b, author = {Braun, Christopherus and Helmig, Rainer and Kobus, Helmut and Sheta, Hussam}, month = {05}, note = {, IWS2ID=11 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {1994/09}, title = {Untersuchung zu den Auswirkungen der Erhöhung der Förderleistung der Trinkwasserbrunnen im unteren Neckertal}, type = {Bericht}, volume = {HG200}, year = 1994 }
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 No. 1994/20; Bd. HG208, Nummer 1994/20).
  - BibTeX
  BibTeX
  @techreport{Helmig:1994a, author = {Helmig, Rainer and Braun, Christopherus and Emmert, Martin}, month = {12}, note = {, IWS2ID=14 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {1994/20}, title = {MUFTE - A Numerical Model for Simulation of Multiphase Flow Processes in Porous and Fractured-Porous Media}, type = {Programmdokumentation}, volume = {HG208}, year = 1994 }
49. Braun, C., Helmig, R., & Kobus, H. (1994). Grundwassermodell „Rheintal“,zusätzliche Untersuchungen (Bericht No. 1994/18; Bd. HG207, Nummer 1994/18).
  - BibTeX
  BibTeX
  @techreport{Braun:1994c, author = {Braun, Christopherus and Helmig, Rainer and Kobus, Helmut}, month = {12}, note = {, IWS2ID=12 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {1994/18}, title = {Grundwassermodell "Rheintal",zusätzliche Untersuchungen}, type = {Bericht}, volume = {HG207}, year = 1994 }
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].
  - BibTeX
  BibTeX
  @techreport{Helmig:1993b, author = {Helmig, Rainer and Moritz, Lydia and Zielke, Werner}, month = {12}, note = {, IWS2ID=7 , Institution: Institut für Strömungsmechanik und Elektronisches Rechnen im Bauwesen , Address: Universität Hannover }, title = {Aufbereitung der empirischen Ansätze zur Beschreibung des Kapillardruck-Sättigungs- und des relativen-Permeabilitäts-Sättigungs-Verhaltens in geklüftet-porösen Medien}, type = {Bericht}, year = 1993 }
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 No. 1993/22; Bd. HG185, Nummer 1993/22).
  - BibTeX
  BibTeX
  @techreport{Helmig:1993c, author = {Helmig, Rainer and Meyer, Ulrich}, month = {12}, note = {, IWS2ID=8 , Institution: Institut für Wasserbau , Address: Universität Stuttgart }, number = {1993/22}, title = {Programmbeschreibung ROCKFLOW-SM2-FO, Strömungsmodell für inkompressible Fluide zur Beschreibung freier und gespannter Verhältnisse (1-D und 2-D)}, type = {Programmdokumentation}, volume = {HG185}, year = 1993 }
52. Helmig, R., & Zielke, W. (1991). Mehrphasenprozesse in geklüftet-porösen Medien - Stand der Forschung [Bericht].
  - BibTeX
  BibTeX
  @techreport{Helmig:1991b, author = {Helmig, Rainer and Zielke, Werner}, month = {12}, note = {, IWS2ID=2 , Institution: Institut für Strömungsmechanik und Elektronisches Rechnen im Bauwesen , Address: Universität Hannover }, title = {Mehrphasenprozesse in geklüftet-porösen Medien - Stand der Forschung}, type = {Bericht}, year = 1991 }

Aktuelle Forschungsprojekte

TrinkXtrem: Anpassungsstrategien der öffentlichen Trinkwasserversorgung an Extremereignisse
Laufzeit: 02/2022 - 01/2025
Abteilung: LH2
Leitung: Rainer Helmig, Holger Class
Finanzierung: BMBF
EXC 2075: Coupled flow, transport, and geochemical processes in fractures/fissures with a focus on geothermal and karstic systems
Laufzeit: 10/2021 - 12/2024
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Leitung: Rainer Helmig, Holger Class, Bernd Flemisch
Finanzierung: DFG
SFB1313, C02: Upscaling of pore-scale processes involving microstructural evolution
Laufzeit: 01/2018 - 12/2025
Abteilungen: LH2 und IANS
Leitung: Rainer Helmig, Christian Rohde, luliu Sorin Pop
Finanzierung: DFG
SFB 1313, A02: Modellkonzepte für gekoppelte freie Strömungen mit Strömungen in porösen Medien
Laufzeit: 01/2018 - 12/2025
Abteilungen: LH2 und ITLR
Leitung: Rainer Helmig, Bernhard Weigand
Finanzierung: DFG
GRK 2160 DROPIT: Upscaling of coupled free-flow and porous-media-flow processes
Laufzeit: 10/2016 - 09/2025
Abteilung: LH2
Leitung: Rainer Helmig, Carina Bringedal
Finanzierung: DFG

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