Perfectly matched layer for FDTD computations in piezoelectric crystals

Author

Chagla, F. ; Cabani, C. ; Smith, P.M.

Author_Institution

Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont., Canada

Volume

1

fYear

2004

fDate

23-27 Aug. 2004

Firstpage

517

Abstract

In (P. M. Smith et al, IEEE Ultrasonics Symp. Proc., p.313-316, 2002) the finite difference time domain technique was first applied to acoustic wave propagation in piezoelectric materials. A problem of spurious reflections from the edge of the computational region was observed. In this paper, a perfectly matched layer (PML) is developed that solves the issue of spurious reflections and provides the capability of simulating acoustic wave propagation in a sub-region of an infinite medium. Several snapshots of an acoustic wave are presented to illustrate the functionality of the PML. The maximum error due to edge reflections is found to be less than 0.5%.

Keywords

acoustic wave propagation; acoustic wave reflection; anisotropic media; finite difference time-domain analysis; piezoelectric materials; FDTD computation; PML; acoustic wave propagation; anisotropic medium; computational region spurious edge reflections; edge reflection induced errors; perfectly matched layer; piezoelectric crystals; Acoustic propagation; Acoustic reflection; Acoustic waves; Boundary conditions; Crystals; Electromagnetic propagation; Equations; Finite difference methods; Perfectly matched layers; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2004 IEEE

ISSN

1051-0117

Print_ISBN

0-7803-8412-1

Type

conf

DOI

10.1109/ULTSYM.2004.1417776

Filename

1417776