Preprint No. A-04-06

Susanne Gebauer, Ralf Kornhuber, Harry Yserentant

Hierarchical decomposition of domains with fractures

Abstract: We consider the efficient and robust numerical solution of elliptic problems with jumping coefficients occurring on a network of thin fractures. We present an iterative solution concept based on a hierarchical separation of the fractures and the surrounding rock matrix. Upper estimates for the convergence rates are independent of the width of the fractures and of the jumps of the coefficients. Inexact solution of the local subproblems is also considered. The theoretical results are illustrated by numerical experiments.

Keywords: domain decomposition, subspace correction, anisotropic finite elements

Mathematics Subject Classification (MSC00): 65M15, 65M55, 65M60

Language: ENG

Available: Pr-A-04-06.ps, Pr-A-04-06.ps.gz

Contact: Ralf Kornhuber, Freie Universität Berlin, Fachbereich Mathematik und Informatik, Arnimallee 2-6, D-14195 Berlin, Germany (kornhube@math.fu-berlin.de)

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