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A Full Space-Time Convergence Order Analysis of Operator Splittings for Linear Dissipative Evolution Equations

Published online by Cambridge University Press:  17 May 2016

Eskil Hansen*
Affiliation:
Centre for Mathematical Sciences, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden
Erik Henningsson*
Affiliation:
Centre for Mathematical Sciences, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden
*
*Corresponding author. Email addresses:eskil@maths.lth.se (E. Hansen), erikh@maths.lth.se (E. Henningsson)
*Corresponding author. Email addresses:eskil@maths.lth.se (E. Hansen), erikh@maths.lth.se (E. Henningsson)

Abstract

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The Douglas-Rachford and Peaceman-Rachford splitting methods are common choices for temporal discretizations of evolution equations. In this paper we combine these methods with spatial discretizations fulfilling some easily verifiable criteria. In the setting of linear dissipative evolution equations we prove optimal convergence orders, simultaneously in time and space. We apply our abstract results to dimension splitting of a 2D diffusion problem, where a finite element method is used for spatial discretization. To conclude, the convergence results are illustrated with numerical experiments.

Information

Type
Research Article
Copyright
Copyright © Global-Science Press 2016