Acoustic levitation of a large solid sphere

Autor(es)

Andrade, Marco A. B. ; Bernassau, Anne L. ; Adamowski, Julio C.

• Tipo de documento: Artigo Científico
• Fonte: Applied Physics Letters; v. 109, n. 4 JUL 25 2016.
• Citações Web of Science: 25

Resumo

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 50mm 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. Published by AIP Publishing. (AU)

• Processo FAPESP: 14/24159-1 - Manipulação sem contato de partículas utilizando ultrassom
• Beneficiário: Marco Aurélio Brizzotti Andrade
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 15/50408-1 - Anne Bernassau | Heriot Watt University - Escócia
• Beneficiário: Marco Aurélio Brizzotti Andrade
• Linha de fomento: Auxílio à Pesquisa - Pesquisador Visitante - Internacional