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Unconditionally stable mixed finite element methods for Darcy flow. (English) Zbl 1194.76109
Summary: Unconditionally stable finite element methods for Darcy flow are derived by adding least squares residual forms of the governing equations to the classical mixed formulations. The proposed methods are free of mesh dependent stabilization parameters and allow the use of the classical continuous Lagrangian finite element spaces of any order for the velocity and the potential. Stability, convergence and error estimates are derived and numerical experiments are presented to demonstrate the flexibility of the proposed finite element formulations and to confirm the predicted rates of convergence.

76M10Finite element methods (fluid mechanics)
76S05Flows in porous media; filtration; seepage
65N12Stability and convergence of numerical methods (BVP of PDE)
65N30Finite elements, Rayleigh-Ritz and Galerkin methods, finite methods (BVP of PDE)
Full Text: DOI
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