Home
  • E-mailHelge.Dahle@uib.no
  • Phone+47 55 58 48 56+47 452 49 795
  • Visitor Address
    Realfagbygget, Allegaten 41, 4 etg. sør
    Bergen
    Room 
    4A13d
  • Postal Address
    Postboks 7803
    5020 Bergen

My main field of work has been related to mathematical and numerical modeling of flow and transport in porous media. In my research work. I have been interested in up-scaling from pore- to continuum scale and further to field scale. A particular topic of interest has been Lagrangian-type methods for advection-dominated (hyperbolic) transport. I have also been interested in pore-scale modeling. More recently, I have worked on modeling of geological storage of CO2. A main challenge has been to derive efficient numerical methods to predict the distribution and migration of a CO2-plume under different storage scenarios. Important questions are to derive and identify as physically simple models as possible, and still capture the main features of the processes.

Academic article
  • Gasda, Sarah Eileen; Aavatsmark, Ivar; Stephansen, Annette; Dahle, Helge K. 2013. Upscaled modeling of CO2 injection with coupled thermal processes. Energy Procedia. 384-391.
  • du Plessis, Elsa; Nordbotten, Jan Martin; Gasda, Sarah; Dahle, Helge K. 2013. Influence of capillary pressure and trapping hysteresis on large-scale CO2 migration. Journal of Coupled Systems and Multiscale Dynamics. 442-458.
  • Gasda, Sarah Eileen; Nilsen, Halvor Møll; Dahle, Helge K. 2013. Impact of structural heterogeneity on upscaled models for large-scale CO2 migration and trapping in saline aquifers. Advances in Water Resources. 520-532.
  • Nordbotten, Jan Martin; Flemisch, Bernd; Gasda, Sarah Eileen; Nilsen, Halvor Møll; Fan, Yun; Pickup, Gillian E.; Wiese, Bernd; Celia, Michael A.; Dahle, Helge K.; Eigestad, Geir Terje; Pruess, Karsten. 2012. Uncertainties in practical simulation of CO2 storage. International Journal of Greenhouse Gas Control. 234-242.
  • Gasda, Sarah Eileen; Nilsen, Halvor Møll; Dahle, Helge K.; Gray, William G. 2012. Effective models for CO2 migration in geological systems with varying topography. Water Resources Research. 17 pages.
  • Gray, William G.; Herrera, Paulo; Gasda, Sarah Eileen; Dahle, Helge K. 2012. Derivation of vertical equilibrium models for CO2 migration from pore scale equations. International Journal of Numerical Analysis & Modeling. 745-776.
  • Aker, Eyvind; Bjørnarå, Tore Ingvald; Braathen, Alvar; Brandvoll, Øyvind; Dahle, Helge K.; Nordbotten, Jan Martin; Aagaard, Per; Hellevang, Helge; Alemu, Binyam Lema; Pham, Van Thi Hai; Johansen, Harald; Wangen, Magnus; Nøttvedt, Arvid; Aavatsmark, Ivar; Johannessen, Truls; Durand, Dominique. 2011. SUCCESS: SUbsurface CO2 storage–Critical elements and superior strategy. Energy Procedia. 6117-6124.
  • Nordbotten, Jan Martin; Dahle, Helge K. 2011. Impact of the capillary fringe in vertically integrated models for CO2 storage. Water Resources Research.
  • Nilsen, Halvor Møll; Herrera, Paulo; Ashraf, Seyed Meisam; Ligaard, Ingeborg S; Iding, Martin; Hermanrud, Christian; Lie, Knut-Andreas; Nordbotten, Jan Martin; Dahle, Helge K.; Keilegavlen, Eirik. 2011. Field-case simulation of CO2-plume migration using vertical-equilibrium models. Energy Procedia. 3801-3808.
  • Klausen, Runhild Aae; Mundal, Sissel; Dahle, Helge K. 2011. BARYCENTRIC COORDINATE BASED MIXED FINITE ELEMENTS ON QUADRILATERAL/HEXAHEDRAL MESH. International Journal of Numerical Analysis & Modeling. 584-598.
  • Joekar-Niasar, V; Hassanizadeh, S. Majid; Dahle, Helge K. 2010. Non-equilibrium effects in capillarity and interfacial area in two-phase flow: dynamic pore-network modelling. Journal of Fluid Mechanics. 38-71.
  • Class, Holger; Dahle, Helge Ketil; Helmig, Rainer. 2009. Preface. Computational Geosciences. 405-407.
  • Eigestad, Geir Terje; Dahle, Helge Ketil; Hellevang, Bjarte; Riis, Fridtjof; Johansen, Wenche Tjelta; Øian, Erlend. 2009. Geological modeling and simulation of CO2 injection in the Johansen formation. Computational Geosciences. 435-450.
  • Eikemo, Birgitte; Lie, Knut-Andreas; Eigestad, Geir Terje; Dahle, Helge Ketil. 2009. Discontinuous Galerkin methods for advective transport in single-continuum models of fractured media. Advances in Water Resources. 493-506.
  • Hægland, Håkon; Assteerrawatt, A.; Dahle, Helge Ketil; Eigestad, Geir Terje; Helmig, Rainer. 2009. Comparison of cell- and vertex-centered discretization methods for flow in a two-dimensional discrete-fracture–matrix system. Advances in Water Resources. 1740-1755.
  • Class, Holger; Ebigbo, Anozie; Helmig, Rainer; Dahle, Helge Ketil; Nordbotten, Jan Martin; Celia, Michael A.; Pascal, Audigane; Darcis, Melanie; Ennis-King, Jonathan; Fan, Yaqing; Flemisch, Bernd; Gasda, Sarha; Jin, Min; Krug, Stefanie; Labregere, Diane; Beni, Ali Naderi; Pawar, Rajesh J.; Sbai, Adil; Thomas, Sunil G.; Trenty, Laurent; Lingli, Wei. 2009. A benchmark study on problems related to CO2 storage in geologic formations. Summary and discussion of the results. Computational Geosciences. 409-434.
  • Nordbotten, Jan Martin; Celia, Michael A.; Dahle, Helge Ketil; Hassanizadeh, S. Majid. 2008. On the definition of macroscale pressure for multiphase flow in porous media. Water Resources Research. 8 pages.
  • Nordbotten, Jan Martin; Celia, Michael A.; Dahle, Helge Ketil; Hassanizadeh, S. Majid. 2007. Interpretation of macroscale variables in Darcy's law. Water Resources Research. 9 pages.
  • Hægland, Håkon; Dahle, Helge Ketil; Eigestad, Geir Terje; Lie, Knut-Andreas; Aavatsmark, Ivar. 2007. Improved streamlines and time-of-flight for streamline simulation on irregular grids. Advances in Water Resources. 1027-1045.
  • Khattri, Sanjay Kumar; Fladmark, Gunnar; Dahle, Helge Ketil. 2006. Control Volume Finite Difference On Adaptive Meshes. Lecture Notes in Computational Science and Engineering.
  • Nordbotten, Jan Martin; Celia, Michael A.; Bachu, Stefan; Dahle, Helge Ketil. 2005. Semi-Analytical Solution for CO2 Leakage through an Abandoned Well. Environmental Science and Technology. 602-611.
  • Dahle, Helge Ketil; Celia, Michael A.; Hassanizadeh, S. Majid. 2005. Bundle-of-tubes model for calculating dynamic effects in the capillary-pressure-saturation relationship. Transport in Porous Media. 5-22.
  • Aadland, Torbjørn; Aavatsmark, Ivar; Dahle, Helge Ketil. 2004. Performance of a flux splitting scheme when solving the single-phase pressure equation discretized by MPFA. Computational Geosciences. 325-340.
  • Nordhaug, Hans Fredrik; Celia, Michael A.; Dahle, Helge Ketil. 2003. A pore network model for calculation of interfacial velocities. Advances in Water Resources. 1061-1074.
  • Berre, Inga; Dahle, Helge Ketil; Karlsen, Kenneth H.; Lie, Knut-Andreas; Natvig, Jostein R. 2002. Time-of-flight + fast Marching + transport collapse: an alternative to streamlines for tow-phase porous media flow with capillary forces? Developments in Water Science. 995-1002.
  • Berre, Inga; Dahle, Helge Ketil; Karlsen, Kenneth H.; Nordhaug, Hans Fredrik. 2002. A streamline front tracking method for two- and three-phase flow including capillary forces. Contemporary Mathematics. 49-61.
  • Karlsen, Kenneth Hvistendahl; Lie, Knut-Andreas; Natvig, Jostein Roald; Nordhaug, Hans Fredrik; Dahle, Helge Ketil. 2001. Operator splitting methods for systems of convection-diffusion equations: nonlinear error mechanisms and correction strategies. Journal of Computational Physics. 636-663.
  • Hassanizadeh, S. Majid; Celia, Michael A.; Dahle, Helge Ketil. 2001. Dynamic effect in the capillary pressure-saturation relationship and its impacts on unsaturated flow. http://www.vadosezonejournal.org/cgi/content/.
  • Dahle, Helge Ketil; Karlsen, Kenneth Hvistendahl; Lie, Knut-A.; Natvig, Jostein R. 2001. Corrected operator splitting for systems of convection-diffusion equations. MANGLER.
  • Wang, Hong; Dahle, Helge Ketil; Ewing, Richard E.; Espedal, Magne S.; Sharpley, RC; Man, SS. 1999. An ELLAM Scheme for advection-diffusion equations in two dimensions. SIAM Journal on Scientific Computing. 2160-2194.
  • Wang, Hong; Dahle, Helge Ketil; Ewing, Richard E.; Espedal, Magne; Sharpley, Robert C.; Man, Shushuang. 1999. An ELLAM Scheme for Advection-Diffusion Equations in Two Dimensions. SIAM Journal on Scientific Computing. 2160-2194.
  • Dahle, Helge Ketil; Celia, Michael A. 1999. A dynamic network model for two-phase immiscible flow. Computational Geosciences. 1-22.
  • Karlsen, Kenneth Hvistendahl; Brusdal, Kari; Dahle, Helge Ketil; Evje, S.; Lie, K-A. 1998. The corrected operator splitting approach applied to a nonlinear advection-diffusion problem. Computer Methods in Applied Mechanics and Engineering. 239-260.
  • Wang, Hong; Dahle, Helge Ketil; Espedal, Magne; Ewing, R.E.; Sharpley, R.C.; Man, S. 1998. An ELLAM scheme for advection-dispersion equations in two dimensions. SIAM Journal on Scientific Computing.
  • Brusdal, Kari; Dahle, Helge Ketil; Karlsen, Kenneth Hvistendahl; Mannseth, Trond. 1998. A study of the modelling error in two operator splitting algorithms f or porous media flow. Computational Geosciences. 23-26.
  • Kvam, Gunnar; Dahle, Helge Ketil; Nordrehaug, J.E.; Randa, T.I.; Tillung, T. 1997. The shortening fraction of myocardial fibers and its layered distribution, as derived from cine-MR imaged left ventriculograms - An approach for evaluating globar left ventricular function. Acta Radiologica. 391-399.
  • Karlsen, Kenneth Hvistendahl; Brusdal, Kari; Dahle, Helge Ketil; Evje, Steinar; Lie, Knut-Andreas. 1997. The corrected operator splitting approach to a nonlinear advection-diffusion problem. Applied Mathematics Report.
  • Våg, Jan Einar; Wang, Hong; Dahle, Helge Ketil. 1996. Eulerian-Lagrangian localized adjoint methods for systems of nonlinear advective-diffusive-reactive equations. Advances in Water Resources. 297-315.
  • Dahle, Helge Ketil; Ewing, Richard E.; Russell, Thomas F. 1995. Eulerian-Lagrangian localized adjoint methods for a nonlinear advection-diffusion equation. Computer Methods in Applied Mechanics and Engineering. 223-250.
Report
  • Binning, Philip; Engesgaard, Peter; Dahle, Helge Ketil; Pinder, George; Gray, William G. 2006. Proceedings of the XVI International Conference on Computational Methods in Water Resources. .
  • Dahle, Helge Ketil; Celia, Michael A.; Hassanizadeh, S. Majid. 2003. Bundle-of-Tubes Model for Calculating Dynamic Effects in the Capillary-Pressure-Saturation relationship. .
  • Brusdal, Kari; Dahle, Helge Ketil; Karlsen, Kenneth Hvistendahl; Mannseth, Trond. 1997. A study of the modelling error in two operator splitting algorithms for porous media flow. 112. 112. .
  • Dahle, Helge Ketil; Oien, Alf. 1995. ELLAM-based operator splitting for nonlinear advection diffusion equations. 98. 98. .
  • Dahle, Helge Ketil. 1988. Adaptive characteristic operator splitting techniques for convectiondominated diffusion problems in one and two space dimensions. 85. 85. .
Lecture
  • Gasda, Sarah Eileen; Gray, William; Dahle, Helge K. 2014. Vertically integrated models with coupled thermal processes.
  • Dahle, Helge K. 2012. Kan CO2-lagring på lange tidsskalaer modelleres?
Popular scientific lecture
  • Dahle, Helge Ketil. 1998. An Algorithm for Simulating Dynamic Effects in a Pore Scale Network Model of Two Phase Flow.
Academic lecture
  • Gasda, Sarah Eileen; Aavatsmark, Ivar; Stephansen, Annette F.; Dahle, Helge K. 2013. Upscaled modeling of CO2 injection with coupled thermal processes.
  • Gasda, Sarah Eileen; Dahle, Helge K.; Nordbotten, Jan Martin; Nilsen, Halvor Møll. 2013. Quantifying storage capacity using upscaled models for CO2 storage.
  • Gasda, Sarah Eileen; Andersen, Odd; Nilsen, Halvor Møll; Aavatsmark, Ivar; Dahle, Helge K. 2013. Coupled Thermal Models with Vertical Equilibrium for CO2 storage.
  • Gasda, Sarah Eileen; Nilsen, Halvor Møll; Dahle, Helge K. 2012. Upscaled models for CO2 migration in geological formations with structural heterogeneity.
  • Gasda, Sarah Eileen; Dahle, Helge K.; Nilsen, Halvor Møll. 2012. Upscaled models for CO2 migration.
  • Gasda, Sarah Eileen; Nilsen, Halvor Møll; Dahle, Helge K.; Gray, William. 2012. Effective models for CO2 migration in geological systems with varying topography.
  • Hægland, Håkon; Celia, Michael A.; Dahle, Helge Ketil; Eigestad, Geir Terje; Nordbotten, Jan Martin. 2006. Streamline methods on fault adapted grids for risk assessment of storage of CO2 in geological formations.
  • Nordbotten, Jan Martin; Celia, Michael A.; Dahle, Helge Ketil; Hassanizadeh, S. Majid. 2006. On the definition of macro-scale pressure for multi-phase flow in porous media.
  • Hægland, Håkon; Dahle, Helge Ketil; Aavatsmark, Ivar; Eigestad, Geir Terje; Lie, Knut-Andreas. 2006. Adaptive streamline tracing for streamline simulation on irregular grids.
  • Hægland, Håkon; Lie, Knut-Andreas; Dahle, Helge Ketil; Eigestad, Geir Terje. 2006. Adaptive Streamline Tracing for Streamline Simulation on Irregular Grids.
  • Eikemo, Birgitte; Berre, Inga; Dahle, Helge Ketil; Lie, Knut-Andreas; Natvig, Jostein R. 2006. A Discontinuous Galerkin Method for Computing Time-of-Flight in Discrete-Fracture Models.
  • Celia, Michael A.; Bachu, Stefan; Nordbotten, Jan Martin; Gasda, Sarah; Dahle, Helge Ketil. 2004. Quantitative estimation of CO2 leakage from geological storage: Analytical models, numerical models, and data needs.
  • Dahle, Helge Ketil. 2004. Dynamic Effects in Constitutive Relationships for Two-Phase Flow in Porous Media: Insights From and About Bundle of Tubes Models.
  • Celia, Michael A.; Dahle, Helge Ketil; Hassanizadeh, S. Majid. 2004. Dynamic Effects in Capillary Pressure Relationships for Two-phase Flow in Porous Media: Insights from Bundle-of-Tubes Models and their Implications.
  • Heimsund, Bjørn-Ove; Dahle, Helge Ketil; Espedal, Magne. 2004. Adjoint methods are particle methods: Implications for Eulerian-Langrangian modeling of multiphase multicomponent transport.
  • Gielen, Twan; Hassanizadeh, S. Majid; Celia, Michael A.; Dahle, Helge Ketil; Leijnse, A. 2004. A pore-scale network approach to investifate dynamic effects in multiphase flow.
  • Heimsund, Bjørn-Ove; Dahle, Helge Ketil; Espedal, Magne. 2003. Eulerian-Lagrangian methods for non-linear advection problems.
  • Dahle, Helge Ketil; Celia, Michael A.; Hassanizadeh, S. Majid. 2003. A Bundle of Capillary Tubes Model to Investigate Dynamic Effects in the Capillary-Pressure-Saturation Relationship.
  • Dahle, Helge Ketil. 2002. Time-of-flight+transport collapse: An alternative to streamlines for two-phase porous media flow with capillary forces.
  • Dahle, Helge Ketil. 2002. Study of Pc-Sw relationship using a dynamic pore-scale network model.
  • Dahle, Helge Ketil. 2002. A total pressure-saturation formulation of two-phase flow incorperating dynamic effects in the capillary-pressure-saturation relationship.
  • Berre, Inga; Dahle, Helge Ketil; Karlsen, Kenneth Hvistendahl; Nordhaug, Hans Fredrik. 2002. A streamline front-tracking method for two- and three-phase flow including capillary forces.
  • Nordhaug, Hans Fredrik; Dahle, Helge Ketil; Espedal, Magne; Gray, William G.; Celia, Michael A. 2000. Two phase flow including interfacial area as a variable.
  • Celia, Michael A.; Dahle, Helge Ketil; Hassanizadeh, S. Majid. 2000. Dynamic pore-scale network models for two-phase flow in porous media.
  • Ask, Ann K.; Dahle, Helge Ketil; Karlsen, Kenneth Hvistendahl; Nordhaug, Hans Fredrik. 2000. A local streamline Eulerian-Lagrangian method for two-phase flow.
  • Dahle, Helge Ketil; Nordhaug, Hans Fredrik; Gray, William G.; Espedal, Magne S.; Celia, Michael A. 2000. A Two Phase Flow Model Including Dynamics of Interfacial Area.
  • Nordhaug, Hans Fredrik; Ask, Ann K.; Dahle, Helge Ketil; Karlsen, Kenneth Hvistendahl. 2000. A Sketch: Solving a Multidimensional Three Phase Flow Problem.
  • Celia, M.A.; Reeves, P.C.; Dahle, Helge Ketil. 1998. On the use of pore-scale computational models for two-phase porous media flows.
  • Dahle, Helge Ketil. 1997. Numerisk modellering av strømning i grunnvannsreservoar.
  • Tai, Xue-Cheng; Dahle, Helge Ketil; Espedal, Magne. 1997. Identification of the discontinuios permability of a one phase flow reservoir by Petrov-Galerkin method.
  • Karlsen, Kenneth Hvistendahl; Dahle, Helge Ketil; Frøyen, J.; Lie, K.-A.; Risebro, N.H. 1997. Corrected operator splitting for nonlinear advection-diffusion.
  • Dahle, Helge Ketil; Celia, M.; Karlsen, Kenneth Hvistendahl. 1997. Combining the corrected operator splitting method with streamline computation to solve nonlinear advection-diffusion equations.
  • Dahle, Helge Ketil; Celia, M.; Hassanizadeh, M. 1997. A dynamic algorithm for simulating two-phase flow in a pore-scale network model.
  • Tai, Xue-Cheng; Johansen, O.W.; Dahle, Helge Ketil; Espedal, Magne. 1997. A characteristic domain splitting method.
  • Tai, Xue-Cheng; Johansen, Torbjørn O. W.; Dahle, Helge Ketil; Espedal, Magne. 1996. A characteristic domain splitting method.
  • Dahle, Helge Ketil; Johansen, T.O.W.; Botnen, Tone; Tai, Xue-Cheng. 1996. A characteristic domain decomposition method for modeling flow in a coastal aquifer.
Editorial
  • Helmig, Rainer; Hassanizadeh, S. Majid; Dahle, Helge K. 2016. Foreword: NUPUS: Porous Media Research Has Got a Brand Name. Transport in Porous Media. 235-236.
Reader opinion piece
  • Berre, Inga; Dahle, Helge K.; Karlsen, Kenneth Hvistendahl; Nordbotten, Jan Martin; Tai, Xue-Cheng; Winther, Ragnar. 2012. Magne Espedal Memorial Issue. International Journal of Numerical Analysis & Modeling. I-II.
Thesis at a second degree level
  • Dahle, Helge Ketil. 1985. Trykkeffektar på tearingmoden: Ein kollisjonsdominert to-væske modell.
Masters thesis
  • El-Faour, Bassel. 2010. On the use of vertically averaged models to simulate CO2 migration in a layered saline aquifer.
  • Mykkeltvedt, Trine. 2010. Modeling dissolution within vertically averaged formulations.
Popular scientific article
  • Dahle, Helge Ketil. 2002. Grunnvatn og matematikk. QED Fakultetsavisa for Det matematisk-naturvitenskapelige fakultet. 6-7.
Feature article
  • Nordbotten, Jan Martin; Dahle, Helge Ketil. 2008. Utopiske Greenpeace. Dagbladet.
Doctoral dissertation
  • Zamani, Nematollah. 2015. Pore Scale Modeling of Polymer Flow Using the Navier-Stokes Approach.
  • Berre, Inga. 2005. Fast Simulation of Transport and Adaptive Permeability Estimation in Porous Media.
  • Dahle, Helge K. 1989. Adaptive characteristic operator splitting techniques for convection-dominated diffusion problems in one and two space dimensions.
Academic chapter/article/Conference paper
  • Gasda, Sarah Eileen; Gray, William; Dahle, Helge K. 2014. Vertically integrated models with coupled thermal processes. -1234 pages.
  • Gasda, Sarah Eileen; du Plessis, Elsa; Dahle, Helge K. 2013. Upscaled models for CO2 injection and migration in geological systems.
  • Dahle, Helge Ketil; Johanssen, T.; Bone, T.; Tai, Xue-Cheng. 1998. A characteristic domain decomposition method for modelling the flow in a coastal aquifer.
Other
  • Gasda, Sarah Eileen; Nilsen, Halvor Møll; Dahle, Helge K. 2012. Upscaled models for CO2 migration in geological formations with structural heterogeneity.
  • Nordhaug, Hans Fredrik; Dahle, Helge K.; Espedal, Magne; Gray, William G.; Celia, Michael A. 2000. Two phase flow including interfacial area as a variable.
  • Ask, Ann K.; Dahle, Helge K.; Karlsen, Kenneth Hvistendahl; Nordhaug, Hans Fredrik. 2000. A Local Streamline Eulerian-Lagrangian Method for Two-Phase Flow.
Poster
  • Hægland, Håkon; Dahle, Helge Ketil; Eigestad, Geir Terje; Nordbotten, Jan Martin; Celia, Michael A.; Anongnart, Assteerawatt. 2006. Streamline methods on grids adapting to fractures.
  • Nordbotten, Jan Martin; Celia, Michael A.; Bachu, Stefan; Dahle, Helge Ketil. 2004. Similarity solutions for CO2 injection in aquifers.
  • Khattri, Sanjay Kumar; Fladmark, Gunnar E; Dahle, Helge Ketil. 2004. Numerics of CO2 sequestration.
  • Nordhaug, Hans Fredrik; Celia, Michael A.; Dahle, Helge Ketil. 2000. Two phase flow: Two coupled equations for interfacial area and saturation.
  • Nordhaug, Hans Fredrik; Celia, Michael A.; Dahle, Helge Ketil. 2000. Two Phase Flow, Interfacial Area and Dynamic Network Modeling.
  • Dahle, Helge Ketil; Nordhaug, Hans Fredrik; Celia, Michael A.; Gray, William G.; Espedal, Magne S. 2000. A Two Phase Flow Model Including Dynamics of Interfacial Areas.
  • Brusedal, Kari; Dahle, Helge Ketil; Karlsen, Kenneth Hvistendahl; Mannseth, Trond. 1997. Operator splitting and an inverse problem for the Buckley-Leverett equation.

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