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Helge K. Dahles bilde

Helge K. Dahle

Dekan
  • E-postHelge.Dahle@uib.no
  • Telefon+47 55 58 48 56+47 452 49 795
  • Besøksadresse
    Realfagbygget, Allégt. 41
    Rom: 
    4A13d
  • Postadresse
    Postboks 7803
    5020 Bergen
Tidsskriftartikler
  • Helmig, Rainer; Hassanizadeh, S. Majid; Dahle, Helge K. 2016. Foreword: NUPUS: Porous Media Research Has Got a Brand Name. Transport in Porous Media. 114: 235-236. doi: 10.1007/s11242-016-0736-5
  • Gasda, Sarah Eileen; Aavatsmark, Ivar; Stephansen, Annette; Dahle, Helge K. 2013. Upscaled modeling of CO2 injection with coupled thermal processes. Energy Procedia. 40: 384-391. doi: 10.1016/j.egypro.2013.08.044
  • 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. 62: 520-532. doi: 10.1016/j.advwatres.2013.05.003
  • 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. 9: I-II.
  • 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. 48. 17 sider. doi: 10.1029/2012WR012264
  • 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. 9: 745-776.
  • 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. 9: 234-242. doi: 10.1016/j.ijggc.2012.03.007
  • 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. 4: 6117-6124. doi: 10.1016/j.egypro.2011.02.619
  • 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. 8: 584-598.
  • 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. 4: 3801-3808. doi: 10.1016/j.egypro.2011.02.315
  • Nordbotten, Jan Martin; Dahle, Helge K. 2011. Impact of the capillary fringe in vertically integrated models for CO2 storage. Water resources research. 47. doi: 10.1029/2009WR008958
  • 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. 655: 38-71. doi: 10.1017/S0022112010000704
  • Class, Holger; Dahle, Helge Ketil; Helmig, Rainer. 2009. Preface. Computational Geosciences. 13: 405-407. doi: 10.1007/s10596-009-9160-z
  • 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. 13: 409-434. doi: 10.1007/s10596-009-9146-x
  • 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. 13: 435-450. doi: 10.1007/s10596-009-9153-y
  • 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. 32: 493-506. doi: 10.1016/j.advwatres.2008.12.010
  • 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. 32: 1740-1755. doi: 10.1016/j.advwatres.2009.09.006
  • 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. 44. 8 sider. doi: 10.1029/2006WR005715
  • Nordbotten, Jan Martin; Dahle, Helge Ketil. 2008. Utopiske Greenpeace. Dagbladet.
  • 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. 30: 1027-1045. doi: 10.1016/j.advwatres.2006.09.002
  • Nordbotten, Jan Martin; Celia, Michael A.; Dahle, Helge Ketil; Hassanizadeh, S. Majid. 2007. Interpretation of macroscale variables in Darcy's law. Water resources research. 43. 9 sider. doi: 10.1029/2006WR005018
  • Khattri, Sanjay Kumar; Fladmark, Gunnar; Dahle, Helge Ketil. 2006. Control Volume Finite Difference On Adaptive Meshes. Lecture Notes in Computational Science and Engineering.
  • 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. 58: 5-22.
  • 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. 39: 602-611. doi: 10.1021/es035338i
  • 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. 8: 325-340. doi: 10.1007/s10596-004-3774-y
  • Nordhaug, Hans Fredrik; Celia, Michael A.; Dahle, Helge Ketil. 2003. A pore network model for calculation of interfacial velocities. Advances in Water Resources. 26: 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. 47: 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. 295: 49-61.
  • Dahle, Helge Ketil. 2002. Grunnvatn og matematikk. QED Fakultetsavisa for Det matematisk-naturvitenskapelige fakultet. 4: 6-7.
  • Dahle, Helge Ketil; Karlsen, Kenneth Hvistendahl; Lie, Knut-A.; Natvig, Jostein R. 2001. Corrected operator splitting for systems of convection-diffusion equations. MANGLER.
  • 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/.
  • 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. 173: 636-663.
  • Dahle, Helge Ketil; Celia, Michael A. 1999. A dynamic network model for two-phase immiscible flow. Computational Geosciences. 1-22.
  • 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.
  • 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. 2: 23-26.
  • 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. 167: 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.
  • 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. April.
  • 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. 38: 391-399.
  • 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. 19: 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. 122: 223-250.
Rapporter/avhandlinger
  • 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. The proceedings is published on permanent digital public archive maintained by the Technical University of Denmark (DTU). 1800 sider.
  • Dahle, Helge Ketil; Celia, Michael A.; Hassanizadeh, S. Majid. 2003. Bundle-of-Tubes Model for Calculating Dynamic Effects in the Capillary-Pressure-Saturation relationship. MANGLER, Submitted to Transport in Porous Media.
  • 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. Report. 112. Dept of Applied Mathemathics UiB.
  • Dahle, Helge Ketil; Oien, Alf. 1995. ELLAM-based operator splitting for nonlinear advection diffusion equations. Report series in Applied Mathematics. 98. Department of Mathematics. 16 sider.
  • Dahle, Helge K. 1989. Adaptive characteristic operator splitting techniques for convection-dominated diffusion problems in one and two space dimensions.
  • Dahle, Helge Ketil. 1988. Adaptive characteristic operator splitting techniques for convectiondominated diffusion problems in one and two space dimensions. Reports Published by the Department of Applied Mathematics. 85. UiB-MatNat: Matematisk institutt.
  • Dahle, Helge Ketil. 1985. Trykkeffektar på tearingmoden: Ein kollisjonsdominert to-væske modell.
Bokkapitler
  • Gasda, Sarah Eileen; Gray, William; Dahle, Helge K. 2014. Vertically integrated models with coupled thermal processes. Thermal and Heavy Oil Methods, sider 1235. I:
    • EAGE, 2014. 2014. ECMOR XIV - Proceedings of 14th European Conference on the Mathematics of Oil Recovery, Catania, Italy, 8-11 September, 2014. European Association of Geoscientists and Engineers. 2056 sider. ISBN: 978-90-73834-94-1.
  • Gasda, Sarah Eileen; du Plessis, Elsa; Dahle, Helge K. 2013. Upscaled models for CO2 injection and migration in geological systems. chapter. I:
    • Bastian, P.; Kraus, J; Scheichl, R.; Wheeler, M.F. 2013. Simulation of Flow in Porous Media (Radon Series on Computational and Applied Mathematics). Walter de Gruyter. 213 sider. ISBN: 978-3110282214.
  • Gasda, Sarah Eileen; Nilsen, Halvor Møll; Dahle, Helge K. 2012. Upscaled models for CO2 migration in geological formations with structural heterogeneity. B35. I:
    • Masson, Roland; Samier, Pierre. 2012. ECMOR XIII - 13th European Conference on the Mathematics of Oil Recovery, Biarritz, France, 10-13 September 2012. Extended Abstracts USB. European Association of Geoscientists and Engineers. 800 sider. ISBN: 978-90-73834-30-9.
  • Ask, Ann K.; Dahle, Helge K.; Karlsen, Kenneth Hvistendahl; Nordhaug, Hans Fredrik. 2000. A Local Streamline Eulerian-Lagrangian Method for Two-Phase Flow. Konferanseabstract i rapport, sider 645-650. I:
    • Bentley, Laurence R. 2000. Computational methods in water resources XIII : proceedings of the XIII International Conference on Computational Methods in Water Resources, Calgary, Alberta, Canada, 25-29 June 2000. The XIII international conference on computational methods in water resources, Calgary, Alberta, Canada. 700 sider.
  • Nordhaug, Hans Fredrik; Dahle, Helge K.; Espedal, Magne; Gray, William G.; Celia, Michael A. 2000. Two phase flow including interfacial area as a variable. Konferanseabstract i rapport, sider 231-238. I:
    • Bentley, Laurence R. 2000. Computational methods in water resources XIII : proceedings of the XIII International Conference on Computational Methods in Water Resources, Calgary, Alberta, Canada, 25-29 June 2000. The XIII international conference on computational methods in water resources, Calgary, Alberta, Canada. 700 sider.
  • Dahle, Helge Ketil; Johanssen, T.; Bone, T.; Tai, Xue-Cheng. 1998. A characteristic domain decomposition method for modelling the flow in a coastal aquifer. 12, sider 698-705. I:
    • 1998. Domain decomposition methods in science and engineering.

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