Blar i SINTEF Open på forfatter "Klemetsdal, Øystein"
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Accelerating multiscale simulation of complex geomodels by use of dynamically adapted basis functions
Klemetsdal, Øystein; Møyner, Olav; Lie, Knut-Andreas (Journal article; Peer reviewed, 2019)A number of different multiscale methods have been developed as a robust alternative to upscaling and as a means for accelerated reservoir simulation of high-resolution geomodels. In their basic setup, multiscale methods ... -
Nonlinear domain-decomposition preconditioning for robust and efficient field-scale simulation of subsurface flow
Møyner, Olav; Rasmussen, Atgeirr Flø; Klemetsdal, Øystein; Nilsen, Halvor Møll; Moncorgé, Arthur; Lie, Knut-Andreas (Peer reviewed; Journal article, 2023)We discuss a nonlinear domain-decomposition preconditioning method for fully implicit simulations of multicomponent porous media flow based on the additive Schwarz preconditioned exact Newton method (ASPEN). The method ... -
Robust nonlinear Newton solver with adaptive interface-localized trust regions
Klemetsdal, Øystein; Møyner, Olav; Lie, Knut-Andreas (Peer reviewed; Journal article, 2019)The interplay of multiphase flow effects and PVT behavior encountered in reservoir simulations often gives strongly coupled nonlinear systems that are challenging to solve numerically. In a sequentially implicit method, ... -
Unstructured Voronoi grids conforming to lower-dimensional objects
Berge, Runar Lie; Klemetsdal, Øystein; Lie, Knut-Andreas (Journal article; Peer reviewed, 2018)We present a novel mixed-dimensional method for generating unstructured polyhedral grids that conform to prescribed geometric objects in arbitrary dimensions. Two types of conformity are introduced: (i) control-point ...