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A new finite-element discretization of the Stokes problem coupled with the Darcy equations

, , and . IMA Journal of Numerical Analysis, 30 (1): 61--93 (Jan 1, 2010)
DOI: 10.1093/imanum/drn054

Abstract

The flow in a rigid porous medium with a crack is usually modelled by the Darcy equations coupled with the Stokes problem. We first propose a new variational formulation of the Stokes system, where the unknowns are the vorticity, the velocity and the pressure, and describe the corresponding finite-element discretization. We extend this discretization to the case where the Darcy and the Stokes equations are coupled and prove optimal a priori and a posteriori error estimates. We conclude with some numerical experiments.

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