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Interaction of acoustic levitation field with liquid reflecting surface

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3 Author(s)
Hong, Z.Y. ; Department of Applied Physics, Northwestern Polytechnical University, Xi’an 710072, China ; Xie, W.J. ; Wei, B.

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Single-axis acoustic levitation of substances, such as foam, water, polymer, and aluminum, is achieved by employing various liquids as the sound reflectors. The interaction of acoustic levitation field with liquid reflecting surface is investigated theoretically by considering the deformation of the liquid surface under acoustic radiation pressure. Numerical calculations indicate that the deformation degree of the reflecting surface shows a direct proportion to the acoustic radiation power. Appropriate deformation is beneficial whereas excessive deformation is unfavorable to enhance the levitation capability. Typically, the levitation capability with water reflector is smaller than that with the concave rigid reflector but slightly larger than that with the planar rigid reflector at low emitter vibration intensity. Liquid reflectors with larger surface tension and higher density behave more closely to the planar rigid reflector.

Published in:

Journal of Applied Physics  (Volume:107 ,  Issue: 1 )

Date of Publication:

Jan 2010

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