Blar i Department of Mathematics på emneord "VDP::Matematikk og naturvitenskap: 400::Matematikk: 410::Anvendt matematikk: 413"

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    • Controllability on Infinite-Dimensional Manifolds: A Chow-Rashevsky Theorem 

      Khajeh Salehani, Mahdi; Markina, Irina (Peer reviewed; Journal article, 2014-04-29)
      One of the fundamental problems in control theory is that of controllability, the question of whether one can drive the system from one point to another with a given class of controls. A classical result in geometric control ...

    • Inexact linear solvers for control volume discretizations in porous media 

      Keilegavlen, Eirik; Nordbotten, Jan Martin (Peer reviewed; Journal article, 2014-12-03)
      We discuss the construction ofmulti-level inexact linear solvers for control volume discretizations for porous media. The methodology forms a contrast to standard iterative solvers by utilizing an algebraic hierarchy of ...

    • Layout of CCS monitoring infrastructure with highest probability of detecting a footprint of a CO2 leak in a varying marine environment 

      Hvidevold, Hilde Kristine; Alendal, Guttorm; Johannessen, Truls; Ali, Alfatih Omer Mohammed Ahmed; Mannseth, Trond; Avlesen, Helge (Peer reviewed; Journal article, 2015-04-04)
      Monitoring of the marine environment for indications of a leak, or precursors of a leak, will be an intrinsic part of any subsea CO2 storage projects. A real challenge will be quantification of the probability of a given ...

    • 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 ...

    • Two-phase flow in porous media: dynamic capillarity and heterogeneous media 

      van Duijn, Cornelius J.; Cao, Xiulei; Pop, Iuliu Sorin (Peer reviewed; Journal article, 2015-08-11)
      We investigate a two-phase porous media flow model, in which dynamic effects are taken into account in phase pressure difference. We consider a one-dimensional heterogeneous case, with two adjacent homogeneous blocks ...

    • 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 ...

    • Vertically averaged equations with variable density for CO2 flow in porous media 

      Andersen, Odd; Gasda, Sarah Eileen; Nilsen, Halvor Møll (Peer reviewed; Journal article, 2015-03)
      Carbon capture and storage has been proposed as a viable option to reduce CO 2 emissions. Geological storage of CO 2 where the gas is injected into geological formations for practically indefinite storage, is an integral ...

    • The Whitham Equation as a model for surface water waves 

      Moldabayev, Daulet; Kalisch, Henrik; Dutykh, Denys (Peer reviewed; Journal article, 2015-08)
      The Whitham equation was proposed as an alternate model equation for the simplified description of uni-directional wave motion at the surface of an inviscid fluid. As the Whitham equation incorporates the full linear ...