Fast solvers for mixed finite element methods

Document Type

Article

Publication Date

1-1-2009

Abstract

Discretizations of partial differential equations by mixed finite element methods result in large saddle point systems that require efficient solvers. In this chapter we present two classes of iterative methods for such problems: the (preconditioned) Uzawa algorithm and the (preconditioned) minimum residual algorithm. The implementations of these algorithms require either efficient preconditioners for the discrete Laplace operator and/or the efficient solution of the discrete Poisson problem. Towards this end we provide brief introductions to additive Schwarz (domain decomposition/multilevel) preconditioners and multigrid algorithms, after a discussion on block diagonal preconditioners for saddle point problems.

Publication Source (Journal or Book title)

CISM International Centre for Mechanical Sciences, Courses and Lectures

First Page

57

Last Page

88

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