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Sparse convolution quadrature for time domain boundary integral formulations of the wave equation


Hackbusch, W; Kress, W; Sauter, S (2009). Sparse convolution quadrature for time domain boundary integral formulations of the wave equation. IMA Journal of Numerical Analysis, 29(1):158-179.

Abstract

Many important physical applications are governed by the wave equation. The formulation as time domain boundary integral equations involves retarded potentials. For the numerical solution of this problem, we employ the convolution quadrature method for the discretization in time and the Galerkin boundary element method for the space discretization. We introduce a simple a priori cut-off strategy where small entries of the system matrices are replaced by zero. The threshold for the cut-off is determined by an a priori analysis which will be developed in this paper. This analysis will also allow to estimate the effect of additional perturbations such as panel clustering and numerical integration on the overall discretization error. This method reduces the storage complexity for time domain integral equations from O(M2N) to O(M2N1/2 logM), where N denotes the number of time steps and M is the dimension of the boundary element space.

Abstract

Many important physical applications are governed by the wave equation. The formulation as time domain boundary integral equations involves retarded potentials. For the numerical solution of this problem, we employ the convolution quadrature method for the discretization in time and the Galerkin boundary element method for the space discretization. We introduce a simple a priori cut-off strategy where small entries of the system matrices are replaced by zero. The threshold for the cut-off is determined by an a priori analysis which will be developed in this paper. This analysis will also allow to estimate the effect of additional perturbations such as panel clustering and numerical integration on the overall discretization error. This method reduces the storage complexity for time domain integral equations from O(M2N) to O(M2N1/2 logM), where N denotes the number of time steps and M is the dimension of the boundary element space.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Mathematics
Dewey Decimal Classification:510 Mathematics
Language:English
Date:2009
Deposited On:11 Nov 2009 15:38
Last Modified:02 Aug 2018 16:23
Publisher:Oxford University Press
ISSN:0272-4979
OA Status:Green
Publisher DOI:https://doi.org/10.1093/imanum/drm044
Related URLs:http://www.ams.org/mathscinet-getitem?mr=2470945

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