Domain decomposition preconditioning for parallel PDE software

  • Authors:
  • P. K. Jimack

  • Affiliations:
  • School of Computing, University of Leeds, United Kingdom

  • Venue:
  • Engineering computational technology
  • Year:
  • 2002

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Abstract

Domain decomposition methods have been applied to the solution of engineering problems for many years. Over the past two decades however the growth in the use of parallel computing platforms has ensured that interest in these methods, which offer the possibility of parallelism in a very natural manner, has become greater than ever. This interest has led to research that has yielded significant advances in both the theoretical understanding of the underlying mathematical structure behind domain decomposition methods and in the variety of domain decomposition algorithms that are available for use by the engineering community. In this paper we provide a brief overview of some of the main categories of domain decomposition algorithm and then focus on a particular variant of the overlapping Schwarz algorithm that is based upon the use of a hierarchy of finite element grids. Throughout the paper we consider domain decomposition methods as preconditioners for standard, Krylov subspace, iterative solvers however they may also be used directly as iterative methods in their own right. All of the theoretical results that are described apply equally in both cases.