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  • A robust linearization scheme for finite volume based discretizations for simulation of two-phase flow in porous media 

    Radu, Adrian Florin; Nordbotten, Jan Martin; Pop, Iuliu Sorin; Kumar, Kundan (Elsevier, 2015-12)
    In this work we consider a mathematical model for two-phase flow in porous media. The fluids are assumed immiscible and incompressible and the solid matrix non-deformable. The mathematical model for the two-phase flow is ...
    Journal article
  • Non-standard shocks in the Buckley-Leverett equation 

    Kalisch, Henrik; Mitrovic, Darko; Nordbotten, Jan Martin (Elsevier, 2015-08)
    It is shown how delta shock waves which consist of Dirac delta distributions and classical shocks can be used to construct non-monotone solutions of the Buckley–Leverett equation. These solutions are interpreted using a ...
    Journal article
  • A Comparison of Anthropometric Measures for Assessing the Association between Body Size and Risk of Chronic Low Back Pain: TheHUNT Study 

    Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker (PLOS, 2015-10-27)
    Background: Previous work indicates that overweight and obese individuals carry an increased risk of experiencing chronic low back pain (LBP). It is not known, however, how the association with body size depends on the ...
    Journal article
  • 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 (Elsevier, 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 ...
    Journal article
  • Heat Transfer Upscaling in Geothermal Reservoirs 

    Varzina, Anna (The University of Bergen, 2015-11-20)
    In this thesis we implement a numerical model of heat transfer in geothermal reservoirs. We use existing pressure and flow transport solvers as a starting point to investigate discretization techniques for a ...
    Master thesis
  • Design of a monitoring program in a varying marine environment 

    Frøysa, Håvard Guldbrandsen (The University of Bergen, 2015-09-14)
    In this thesis we develop methods for optimal design of a monitoring program for offshore geological CO2 storage. The goal is to find the layout of fixed chemical sensors at the seafloor that maximizes the probability ...
    Master thesis
  • A robust implicit scheme for two-phase flow in porous media 

    Kvashchuk, Anna (The University of Bergen, 2015-11-26)
    In this thesis we present a new implicit scheme for the numerical simulation of two-phase flow in porous media. Linear finite elements are considered for the spatial discretization. The scheme is based on the ...
    Master thesis
  • An Approach for Investigation of Geochemical Rock-Fluid Interactions 

    Bringedal, Carina; Berre, Inga; Radu, Florin A. (Stanford University, 2014)
    Geochemistry has a substantial impact in exploiting of geothermal systems. When water is injected in a geothermal reservoir, the injected water and in-situ brine have different temperatures and chemical compositions and ...
    Conference object
  • Influence of natural convection in a porous medium when producing from borehole heat exchangers 

    Bringedal, Carina; Berre, Inga; Nordbotten, Jan Martin (WileyAmerican Geophysical Union, 2013-08)
    Convection currents in a porous medium form when the medium is subject to sufficient heating from below (or equivalently, cooling from above) or when cooled or heated from the side. In the context of geothermal energy ...
    Journal article
  • Linear and nonlinear convection in porous media between coaxial cylinders 

    Bringedal, Carina; Berre, Inga; Nordbotten, Jan Martin; Rees, D. Andrew S. (AIP, 2011)
    We uncover novel features of three-dimensional natural convection in porous media by investigating convection in an annular porous cavity contained between two vertical coaxial cylinders. The investigations are made using ...
    Journal article
  • Modeling of heat transfer in porous media in the context of geothermal energy extraction 

    Bringedal, Carina (The University of Bergen, 2015-10-02)
    This dissertation concerns mathematical modeling related to heat transfer in the subsurface relevant for geothermal energy extraction. Two applications are considered: First, natural convection in a homogeneous porous ...
    Doctoral thesis
  • The Whitham Equation as a model for surface water waves 

    Moldabayev, Daulet; Kalisch, Henrik; Dutykh, Denys (Elsevier, 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 ...
    Journal article
  • Matroider og lineære koder 

    Larsen, Ann-Hege (The University of Bergen, 2005-06-01)
    Master thesis
  • Algebra i første klasse 

    Lid, Elin Røkeberg (The University of Bergen, 2015-10-12)
    Oppgaven handler om algebra i første klasse. Hva er tidlig algebra og hvordan kan vi undervise på en slik måte at vi utvikler elevenes algebraiske tenkning? Tidlig algebra er ikke at vi underviser skolealgebra tidligere, ...
    Master thesis
  • Ensemble Methods of Data Assimilation in Porous Media Flow for Non-Gaussian Prior Probability Density 

    Zhang, Yanhui (The University of Bergen, 2015-08-28)
    Ensemble-based data-assimilation methods have gained fast growth since the ensemble Kalman filter (EnKF) was introduced into the petroleum engineering. Many techniques have been developed to overcome the inherent disadvantages ...
    Doctoral thesis
  • Models for CO2 injection with coupled thermal processes 

    Kometa, Bawfeh Kingsley; Gasda, Sarah Eileen; Aavatsmark, Ivar (Elsevier, 2014)
    Large-scale models of carbon dioxide (CO2) storage in geological formations must capture the relevant physical, chemical and thermodynamic processes that affect the migration and ultimate fate of injected CO2. These processes ...
    Journal article
  • Analytical Methods for Upscaling of Fractured Geological Reservoirs 

    Sævik, Pål Næverlid (The University of Bergen, 2015-10-16)
    Numerical simulations have become an essential tool for planning well operations in the subsurface, whether the application is petroleum production, geothermal energy, groundwater utilization or waste disposal and leakage. ...
    Doctoral thesis
  • Vertically averaged equations with variable density for CO2 flow in porous media 

    Andersen, Odd; Gasda, Sarah Eileen; Nilsen, Halvor Møll (Springer, 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 ...
    Journal article
  • International Conference on Greenhouse Gas Technologies (GHGT-12) Models for CO2 injection with coupled thermal proce 

    Kometa, Bawfeh Kingsley; Gasda, Sarah Eileen; Aavatsmark, Ivar (Elsevier, 2014)
    Large-scale models of carbon dioxide (CO2) storage in geological formations must capture the relevant physical, chemical and thermodynamic processes that affect the migration and ultimate fate of injected CO2. These processes ...
    Journal article
  • Good ethics or political and cultural censoring in science? 

    Torrissen, Ole; Glover, Kevin; Haug, tore; Misund, Ole Arve; Skaug, Hans J.; Kaiser, Matthias (2012)
    Peer-reviewed journals are the cornerstones to communicating scientific results. They play a crucial role in quality assurance through the review process, but they also create opportunities for discussions in the scientific ...
    Journal article

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