Blar i Department of Mathematics på forfatter "Dahle, Helge K."
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Adaptive Characteristic Operator Splitting Techniques for Convection-Dominated Diffusion Problems in One and Two Space Dimensions
Dahle, Helge K. (Department of Applied Mathematics report;85, Research report, 1988-12) -
The Corrected Operator Splitting Approach Applied to a Nonlinear Advection-Diffusion Problem
Karlsen, Kenneth Hvistendahl; Brusdal, K.; Dahle, Helge K.; Evje, Steinar; Lie, Knut-Andreas (Department of Applied Mathematics report, Research report, 1997-01) -
ELLAM-based Operator Splitting for Nonlinear Advection-Diffusion Equations
Dahle, Helge K. (Department of Applied Mathematics report, Research report, 1995-06) -
Field-case simulation of CO2-plume migration using vertical-equilibrium models
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 (Peer reviewed; Journal article, 2011)When injected in deep saline aquifers, CO2 moves radially away from the injection well and progressively higher in the formation because of buoyancy forces. Analyzes have shown that after the injection period, CO2 will ... -
Operator splitting methods for systems of convection-diffusion equations: nonlinear error mechanisms and correction strategies
Karlsen, Kenneth Hvistendahl; Lie, Knut-Andreas; Natvig, Jostein Roald; Nordhaug, Hans Fredrik; Dahle, Helge K. (Peer reviewed; Journal article, 2001)Many numerical methods for systems of convection-diffusion equations are based upon an operator splitting formulation, where convective and diffusive forces are accounted for in separate substeps. We describe the nonlinear ... -
A pore network model for calculation of interfacial velocities
Nordhaug, Hans Fredrik; Celia, Michael A.; Dahle, Helge K. (Peer reviewed; Journal article, 2003)Two-phase flow in porous media is characterized by fluid-fluid interfaces that separate the fluid phases at the pore scale. These interfaces support pressure differences between phases, and their dynamics allow for saturation ... -
A Streamline Front Tracking Method for Two- and Three-Phase Flow Including Capillary Forces
Berre, Inga; Dahle, Helge K.; Karlsen, Kenneth Hvistendahl; Nordhaug, Hans Fredrik (Contemporary Mathematics; 295, Chapter, 2002) -
A streamline front tracking method for two- and three-phase flow including capillary forces.
Berre, Inga; Dahle, Helge K.; Karlsen, Kenneth Hvistendahl; Nordhaug, Hans F. (Department of Applied Mathematics report, Research report, 2001-10) -
A Study of the Modelling Error in two Operator Splitting Algorithms for porous Media Flow
Brusdal, Kari; Dahle, Helge K.; Karlsen, Kenneth Hvistendahl; Mannseth, Trond (Department of Applied Mathematics report, Research report, 1997-10) -
SUCCESS: SUbsurface CO2 storage–Critical elements and superior strategy
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 (Peer reviewed; Journal article, 2011)SUCCESS is a Center for Environmental Energy Research in Norway and performs research related to geological storage of CO2 in the subsurface. The SUCCESS centre is established by the Research Council of Norway together ... -
Time-of-Flight Marching + Transport Collapse: An Alternative to Streamlines for Two-Phase Media Flow with Capillary Forces.
Berre, Inga; Dahle, Helge K.; Karlsen, Kenneth Hvistendahl; Lie, Knut-Andreas; Natvig, Jostein Roald (Department of Applied Mathematics report, Research report, 2002-01) -
A total pressure-saturation formulation of two-phase flow incorporating dynamic effects in the capillary-pressure-saturation relationship.
Dahle, Helge K.; Celia, Michael A.; Hassanizadeh, S. Majid; Karlsen, Kenneth Hvistendahl (Department of Applied Mathematics report, Research report, 2002-01) -
Two phase flow including interfacial area as a variable
Nordhaug, Hans Fredrik; Dahle, Helge K.; Espedal, Magne S.; Gray, William G.; Celia, Michael A. (Chapter, 2000)Based on the procedure of (Gray & Hassanizadeh 1998) we state macroscale conservation equations for multi phase flow in porous media including interfacial area as a variable. The phases we consider are a solid phase, a ... -
Upscaled modeling of CO2 injection and migration with coupled thermal processes
Gasda, Sarah Eileen; Stephansen, Annette; Aavatsmark, Ivar; Dahle, Helge K. (Peer reviewed; Journal article, 2013)A practical modeling approach for CO2 storage over relatively large length and time scales is the vertical-equilibrium model, which solves partially integrated conservation equations for flow in two lateral dimensions. We ...