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Author Andrade, Marco A. B. ♦ Bernassau, Anne L. ♦ Adamowski, Julio C.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ ACOUSTICS ♦ AIR ♦ COMPARATIVE EVALUATIONS ♦ DISTANCE ♦ KHZ RANGE 01-100 ♦ LEVITATION ♦ POLYSTYRENE ♦ SPHERES ♦ SPHERICAL CONFIGURATION ♦ STANDING WAVES ♦ TRANSDUCERS ♦ WAVELENGTHS
Abstract We demonstrate that acoustic levitation can levitate spherical objects much larger than the acoustic wavelength in air. The acoustic levitation of an expanded polystyrene sphere of 50 mm in diameter, corresponding to 3.6 times the wavelength, is achieved by using three 25 kHz ultrasonic transducers arranged in a tripod fashion. In this configuration, a standing wave is created between the transducers and the sphere. The axial acoustic radiation force generated by each transducer on the sphere was modeled numerically as a function of the distance between the sphere and the transducer. The theoretical acoustic radiation force was verified experimentally in a setup consisting of an electronic scale and an ultrasonic transducer mounted on a motorized linear stage. The comparison between the numerical and experimental acoustic radiation forces presents a good agreement.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-07-25
Publisher Place United States
Journal Applied Physics Letters
Volume Number 109
Issue Number 4


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