Abstract
This is the fourth paper of a series in which we analyze mathematical properties and develop numerical methods for a degenerate elliptic-parabolic partial differential system which describes the flow of two incompressible, immiscible fluids in porous media. In this paper we describe a finite element approximation for this system on locally refined grids. This adaptive approximation is based on a mixed finite element method for the elliptic pressure equation and a Galerkin finite element method for the degenerate parabolic saturation equation. Both discrete stability and sharp a priori error estimates are established for this approximation. Iterative techniques of domain decomposition type for solving it are discussed, and numerical results are presented.
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Chen, Z., Ewing, R.E. Degenerate Two-Phase Incompressible Flow IV: Local Refinement and Domain Decomposition. Journal of Scientific Computing 18, 329–360 (2003). https://doi.org/10.1023/A:1022673427893
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DOI: https://doi.org/10.1023/A:1022673427893