An efficient PML absorbing medium in FDTD simulations of acoustic scattering in lossy media

Author

Katsibas, Theodoros K. ; Antonopoulos, Christos S.

Author_Institution

Dept. of Electr. & Comput. Eng., Aristotle Univ. of Thessaloniki, Greece

Volume

1

fYear

2002

fDate

8-11 Oct. 2002

Firstpage

551

Abstract

The concept of the PML is used to construct a novel, anisotropic, absorber for acoustic scattering FDTD simulations in lossy media. Overcoming the original PML lossless profile, it is proved that by a proper selection of additional attenuation parameters in a stretched coordinate system a theoretically zero reflection can be achieved, independently of frequency and incident angle. Numerical results - addressing several open-region problems of acoustic propagation and scattering in ordinary media - verify the efficiency of the proposed algorithm, and the accuracy of the computations.

Keywords

absorbing media; acoustic wave scattering; finite difference time-domain analysis; ultrasonic absorption; FDTD simulation; PML absorbing medium; acoustic scattering; lossy media; open-region problems; stretched coordinate system; Acoustic propagation; Acoustic reflection; Acoustic scattering; Acoustic waves; Attenuation; Computational modeling; Equations; Finite difference methods; Frequency; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE

ISSN

1051-0117

Print_ISBN

0-7803-7582-3

Type

conf

DOI

10.1109/ULTSYM.2002.1193463

Filename

1193463