Abstract
A pure second-order scheme of quasi-characteristics based on a pyramidal stencil is applied to the numerical modelling of non-stationary two-phase flows through porous media with the essentially heterogeneous properties. In contrast with other high-resolution well-known schemes with monotone properties, this scheme preserves a second-order approximation in regions, where discontinuities of solutions arise, as well as monotone properties of numerical solutions in those regions. It’s possible since the considering scheme is defined on a non-fixed stencil and is a combination of two solutions of high-order approximation with different dispersion properties. A special criterion of local type according to which, one or another admissible solution is chosen, suitable for parallel computations is proposed. Numerical results showing the efficiency of present approach in computations of two-phase flows through porous media with strongly discontinuous penetration coefficients are presented.
Supported by BK21 project.
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Levin, M.P. (2002). Quasi-Characteristics Scheme with Parallel Facilities for Computations of Two-Phase Flows in Heterogeneous Porous Media. In: Wyrzykowski, R., Dongarra, J., Paprzycki, M., Waśniewski, J. (eds) Parallel Processing and Applied Mathematics. PPAM 2001. Lecture Notes in Computer Science, vol 2328. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-48086-2_58
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DOI: https://doi.org/10.1007/3-540-48086-2_58
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