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Acoustic levitation in the presence of gravityThe method of Gor'kov (1961) has been applied to derive general expressions for the total potential and force on a small spherical object in a resonant chamber in the presence of both acoustic and gravitational force fields. The levitation position is also determined in rectangular resonators for the simultaneous excitation of up to three acoustic modes, and the results are applied to the triple-axis acoustic levitator. The analysis is applied to rectangular, spherical, and cylindrical single-mode levitators that are arbitrarily oriented relative to the gravitational force field. Criteria are determined for isotropic force fields in rectangular and cylindrical resonators. It is demonstrated that an object will be situated within a volume of possible levitation positions at a point determined by the relative strength of the acoustic and gravitational fields and the orientation of the chamber relative to gravity.
Document ID
19900040553
Document Type
Reprint (Version printed in journal)
Authors
Collas, P. (California State University Northridge, United States)
Barmatz, M. (California State Univ. Northridge, CA, United States)
Shipley, C. (JPL Pasadena, CA, United States)
Date Acquired
August 14, 2013
Publication Date
September 1, 1989
Publication Information
Publication: Acoustical Society of America, Journal
ISSN: 0001-4966
Subject Category
ACOUSTICS
Distribution Limits
Public
Copyright
Other