| Full text | |
| Author(s): |
Andrade, Marco A. B.
;
Bernassau, Anne L.
;
Adamowski, Julio C.
Total Authors: 3
|
| Document type: | Journal article |
| Source: | Applied Physics Letters; v. 109, n. 4 JUL 25 2016. |
| Web of Science Citations: | 25 |
| 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 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) | |
| FAPESP's process: | 15/50408-1 - Anne Bernassau | Heriot Watt University - Scotland |
| Grantee: | Marco Aurélio Brizzotti Andrade |
| Support Opportunities: | Research Grants - Visiting Researcher Grant - International |
| FAPESP's process: | 14/24159-1 - Noncontact particle manipulation by ultrasound |
| Grantee: | Marco Aurélio Brizzotti Andrade |
| Support Opportunities: | Regular Research Grants |