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Acoustic radiation force on a compressible spheroid

Authors :
Thomas S. Jerome
Yurii A. Ilinskii
Evgenia A. Zabolotskaya
Mark F. Hamilton
Source :
The Journal of the Acoustical Society of America. 148:2403-2415
Publication Year :
2020
Publisher :
Acoustical Society of America (ASA), 2020.

Abstract

The acoustic radiation force on a compressible spheroid is calculated using expansions of the scattered field in terms of both spherical and spheroidal wave functions that are matched analytically in the far field. There is no restriction on the size or impedance of the spheroid, the structure of the incident field, or the orientation of the spheroid with respect to the incident field. The form of the solution is the same as that developed previously for the radiation force on an elastic sphere, which is a summation of terms involving products of the coefficients in spherical wave expansions of the incident and scattered fields. Spheroidal wave expansions are employed to satisfy the boundary conditions and obtain the scattering coefficients. While the scattering coefficients must be obtained numerically for compressible spheroids, explicit expressions in terms of radial wave functions are available for spheroids with rigid or free surfaces. Results are compared with available analytical expressions for various limiting cases. The theoretical framework may be extended to objects of arbitrary shape.

Details

ISSN :
00014966
Volume :
148
Database :
OpenAIRE
Journal :
The Journal of the Acoustical Society of America
Accession number :
edsair.doi.dedup.....6fe917e5df172f29676a7e409c8d0acb
Full Text :
https://doi.org/10.1121/10.0002277