Discontinuous Galerkin approximation of two-phase flows in heterogeneous porous media with discontinuous capillary pressuresReportar como inadecuado




Discontinuous Galerkin approximation of two-phase flows in heterogeneous porous media with discontinuous capillary pressures - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1 CERMICS - Centre d-Enseignement et de Recherche en Mathématiques et Calcul Scientifique 2 Departamento de Matematica 3 IME - Instituto de Matemática e Estatística

Abstract : We design and investigate a sequential discontinuous Galerkin method to approximate two-phase immiscible incompressible flows in heterogeneous porous media with discontinuous capillary pressures. The nonlinear interface conditions are enforced weakly through an adequate design of the penalties on interelement jumps of the pressure and the saturation. An accurate reconstruction of the total velocity is considered in the Raviart-Thomas-Nedelec finite element spaces, together with diffusivity-dependent weighted averages to cope with degeneracies in the saturation equation and with media heterogeneities. The proposed method is assessed on one-dimensional test cases exhibiting rough solutions, degeneracies, and capillary barriers. Stable and accurate solutions are obtained without limiters.





Autor: Alexandre Ern - Igor Mozolevski - Luciane Schuh -

Fuente: https://hal.archives-ouvertes.fr/



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