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Unsplit complex frequency shifted perfectly matched layer for second-order wave equation using auxiliary differential equations.
- Source :
-
Journal of the Acoustical Society of America . Dec2015, Vol. 138 Issue 6, pEL551-EL557. 7p. - Publication Year :
- 2015
-
Abstract
- The complex frequency shifted perfectly matched layer (CFS-PML) can improve the absorbing performance of PML for nearly grazing incident waves. However, traditional PML and CFS-PML are based on first-order wave equations; thus, they are not suitable for second-order wave equation. In this paper, an implementation of CFSPML for second-order wave equation is presented using auxiliary differential equations. This method is free of both convolution calculations and third-order temporal derivatives. As an unsplit CFS-PML, it can reduce the nearly grazing incidence. Numerical experiments show that it has better absorption than typical PML implementations based on second-order wave equation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00014966
- Volume :
- 138
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Journal of the Acoustical Society of America
- Publication Type :
- Academic Journal
- Accession number :
- 112078753
- Full Text :
- https://doi.org/10.1121/1.4938270