Sound attenuation by small spheroidal particles due to visco-inertial coupling

被引：0

作者：

Babick, Frank ^{[1
]}

Richter, Andreas ^{[1
]}

机构：

[1] Institut für Verfahrenstechnik und Umwelttechnik, TU Dresden, 01062 Dresden, Germany

来源：

Journal of the Acoustical Society of America | 2006年 / 119卷 / 03期

关键词：

The sound attenuation at ultrasonic frequencies caused by small spheroidal particles in a fluid is examined with regard to the size parameters that determine the shape of the attenuation spectrum. Our investigations are based on a coupled phase model for spheroids with arbitrary orientation; thus facilitating the calculation of average attenuation for a given orientation distribution. Since the model just considers the visco-inertial coupling; its applicability is restricted to small solid particles with high density contrast. The calculated attenuation spectra of mono-sized; randomly aligned spheroidal particles are compared with the attenuation spectra of mono-sized spheres. When the latter approximate the former to a reasonable degree the size of the spheres is called attenuation equivalent diameter. It is shown that the concept of attenuation equivalent diameter can be applied only to slightly elongated prolates. Oblates and very stretched prolates yield considerably broader attenuation spectra than mono-sized spheres. While for oblates and for slightly elongated prolates the characteristic frequency of the attenuation spectrum is determined by the volume specific surface; no such attenuation determining size parameter could be identified for very stretched prolates. © 2006 Acoustical Society of America;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Journal article (JA)

引用

页码：1441 / 1448

共 7 条

[1] Sound attenuation by small spheroidal particles due to visco-inertial coupling
Babick, F
Richter, A
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 2006, 119 (03): : 1441 - 1448
[2] Visco-inertial absorption in dilute suspensions of irregular particles
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PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2003, 459 (2037): : 2153 - 2167
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[4] SOUND ATTENUATION BY SMALL PARTICLES IN A FLUID
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[5] FORCES DUE TO DIFFRACTION OF SOUND-WAVE ON SMALL-DIAMETER CYLINDRICAL PARTICLES
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[7] Bottom attenuation estimation using sound intensity fluctuations due to mode coupling by nonlinear internal waves in shallow water
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JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 2016, 140 (05): : 3980 - 3994

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