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Déformations d'interfaces fluides par la pression de radiation acoustique

Abstract : We experimentally studied the statics and the dynamics of the deformations of fluid interfaces induced by the acoustic radiation pressure of a focused beam. Two experimental situations were investigated: • We performed a metrological study to test for the first time the validity of the expression of the acoustic radiation pressure on acoustically transparent interfaces. This study required us to develop an in situ and contactless technique to measure the interfacial tension using the acoustic radiation pressure and to precisely model the dynamics of the interface deformation. • When the liquid interface is perfectly reflecting, an acoustic cavity settles between the interface and the emittor, inducing a strong coupling between the acoustic propagation and the interface deformation. We have shown that this coupling triggers hysteretic phenomena, attenuation of capillary waves by passive retroaction and spontaneous oscillations of the liquid interface.
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Contributor : Bruno Issenmann <>
Submitted on : Friday, May 30, 2008 - 9:59:15 AM
Last modification on : Monday, January 22, 2018 - 11:02:02 AM
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  • HAL Id : tel-00283449, version 1



B. Issenmann. Déformations d'interfaces fluides par la pression de radiation acoustique. Acoustique [physics.class-ph]. Université Sciences et Technologies - Bordeaux I, 2007. Français. ⟨tel-00283449⟩



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