The effect of the geometry of a resonant cavity on the acoustic levitation force

Arturo Orozco Santillán, Ricardo Ruiz Boullosa, Vicente Cutanda Henríquez

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

It is well known that levitating small objects by means of acoustic waves is possible. With levitation, the use of undesired containers or holding devices can be avoided; in addition, conditions of microgravity can be obtained. Acoustic levitation has the advantage that even non-magnetic and non-conducting materials can be suspended. The work presented in this paper describes the dependence of the levitation force on the geometric parameters of a resonant cavity. In this way, a cavity with improved conditions for acoustic levitation is analysed and compared with a cylindrical one, which is commonly used. In order to identify the different resonances and to obtain the sound pressure and the particle velocity fields produced in the cavity, from where the levitation force is calculated, the Boundary Element Method (BEM) has been used. Theoretical predictions are compared with experimental results. It is shown that improved conditions for acoustic levitation can be achieved by an appropriate design of the geometry of the cavity.
Original languageEnglish
Title of host publicationProceedings of the Twelfth International Congress on Sound and Vibration : http://www.iiav.org
Number of pages8
PublisherInternational Institute of Acoustics and Vibration
Publication date2005
Publication statusPublished - 2005
Externally publishedYes

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