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An effective absorbing boundary algorithm for acoustical wave propagator.

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Bibliographic Details
Title: An effective absorbing boundary algorithm for acoustical wave propagator.
Authors: Lin Zhibin1 Iinzhibin@nju.org.cn, Lu Jing1, Xu Boling1
Source: Progress in Natural Science. Sep2007, Vol. 17 Issue 9, p1012-1017. 6p. 4 Graphs.
Subjects: Algorithms, Electromagnetic waves, Electromagnetic theory, Wave packets, Chebyshev systems, Chebyshev polynomials
Abstract: In this paper, Berenger's perfectly matched layer (PML) absorbing boundary condition for electromagnetic waves is introduced as the truncation area of the computational domain to absorb one-dimensional acoustic wave for the scheme of acoustical wave propagator (AWP). To guarantee the efficiency of the AWP algorithm, a regulated propagator matrix is derived in the PML medium. Numerical simulations of a Gaussian wave packet propagating in one-dimensional duct are carried out to illustrate the efficiency of the combination of PML and AWP. Compared with the traditional smoothing truncation windows technique of AWP, this scheme shows high computational accuracy in absorbing acoustic wave when the acoustical wave arrives at the computational edges. Optimal coefficients of the PML configurations are also discussed. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:In this paper, Berenger's perfectly matched layer (PML) absorbing boundary condition for electromagnetic waves is introduced as the truncation area of the computational domain to absorb one-dimensional acoustic wave for the scheme of acoustical wave propagator (AWP). To guarantee the efficiency of the AWP algorithm, a regulated propagator matrix is derived in the PML medium. Numerical simulations of a Gaussian wave packet propagating in one-dimensional duct are carried out to illustrate the efficiency of the combination of PML and AWP. Compared with the traditional smoothing truncation windows technique of AWP, this scheme shows high computational accuracy in absorbing acoustic wave when the acoustical wave arrives at the computational edges. Optimal coefficients of the PML configurations are also discussed. [ABSTRACT FROM AUTHOR]
ISSN:10020071