Convergence of the PML method for elastic wave scattering problems

Chen, Zhiming; Xiang, Xueshuang; Zhang, Xiaohui

doi:10.1090/mcom/3100

Convergence of the PML method for elastic wave scattering problems
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by Zhiming Chen, Xueshuang Xiang and Xiaohui Zhang PDF

Math. Comp. 85 (2016), 2687-2714 Request permission

Abstract:

In this paper we study the convergence of the perfectly matched layer (PML) method for solving the time harmonic elastic wave scattering problems. We introduce a simple condition on the PML complex coordinate stretching function to guarantee the ellipticity of the PML operator. We also introduce a new boundary condition at the outer boundary of the PML layer which allows us to extend the reflection argument of Bramble and Pasciak to prove the stability of the PML problem in the truncated domain. The exponential convergence of the PML method in terms of the thickness of the PML layer and the strength of PML medium property is proved. Numerical results are included.

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