Efficient boundary corrected Strang splitting

Lukas Einkemmer

doi:10.1016/j.amc.2018.03.006

Efficient boundary corrected Strang splitting

2018-09-01

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Alexander Ostermann *

DOI：10.1016/j.amc.2018.03.006

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Strang splitting is a well established tool for the numerical integration of evolution equations. It allows the application of tailored integrators for different parts of the vector field. However, it is also prone to order reduction in the case of non-trivial boundary conditions. This order reduction can be remedied by correcting the boundary values of the intermediate splitting step. In this paper, three different approaches for constructing such a correction in the case of inhomogeneous Dirichlet, Neumann, and mixed boundary conditions are presented. Numerical examples that illustrate the effectiveness and benefits of these corrections are included. (C) 2018 Elsevier Inc. All rights reserved.

Keyword:

Strang splitting

Dirichlet boundary conditions

Neumann boundary conditions

Diffusion-reaction equations

Overcoming order reduction

Efficient boundary corrected Strang splitting

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