Convergence analysis of a subdomain iterative method for the finite element approximation of the coupling of Stokes and Darcy equations

Authors:
Marco Discacciati;Alfio Quarteroni
Affiliations:
Ecole Polytechnique Fédérale de Lausanne, Institut de Mathématiques, Switzerland;Ecole Polytechnique Fédérale de Lausanne, Institut de Mathématiques, Switzerland and Dipartimento di Matematica, Politecnico di Milano, MOX, P.zza Leonardo da Vinci 32, 20133, ...
Venue:
Computing and Visualization in Science
Year:
2004

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Abstract

We consider a Galerkin Finite Element approximation of the Stokes–Darcy problem which models the coupling between surface and groundwater flows. Then we propose an iterative subdomain method for its solution, inspired to the domain decomposition theory. The convergence analysis that we develop is based on the properties of the discrete Steklov–Poincaré operators associated to the given coupled problem. An optimal preconditioner for Krylov methods is proposed and analyzed.