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Erschienen in:
2015 | OriginalPaper | Buchkapitel
Preconditioners for Mixed FEM Solution of Stationary and Nonstationary Porous Media Flow Problems
verfasst von : Owe Axelsson, Radim Blaheta, Tomáš Luber
Erschienen in: Large-Scale Scientific Computing
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Abstract
The paper concerns porous media flow in rigid or deformable matrix. It starts with stationary Darcy flow, but the main interest is in extending Darcy problem to involve time dependent behaviour and deformation of the matrix. The considered problems are discretized by mixed FEM in space and stable time discretization methods as backward Euler and second order Radau methods. The discretization leads to time stepping methods which involve solution of a linear system within each time step. The main focus of the paper is then devoted to the construction of suitable preconditioners for these Euler and Radau systems. The paper presents also numerical experiments for illustration of efficiency of the suggested numerical algorithms.