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Effect of a distant rigid wall on microstreaming generated by an acoustically driven gas bubble

Published online by Cambridge University Press:  21 February 2014

Alexander A. Doinikov  and
Ayache Bouakaz
Alexander A. Doinikov*
Affiliation:
INSERM U930, Université François Rabelais, CHU Bretonneau, 2 Boulevard Tonnellé, 37044 Tours CEDEX 9, France
Ayache Bouakaz
Affiliation:
INSERM U930, Université François Rabelais, CHU Bretonneau, 2 Boulevard Tonnellé, 37044 Tours CEDEX 9, France
*
†Email address for correspondence: [email protected]
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Abstract

A theory is developed that describes acoustic microstreaming around a gas bubble undergoing small radial and translational oscillations in the presence of a distant rigid wall. It is shown that the presence of the wall can change the amplitude and the phase of the bubble oscillations in such a way that the intensity of acoustic microstreaming is increased considerably as compared with that generated by the same bubble in an infinite liquid. This occurs if the driving frequency is close to the resonance frequency that the bubble has in the presence of the wall. Equations for acoustic microstreaming in the boundary layer at the wall are also provided.

JFM classification

Drops and Bubbles: Bubble dynamics Drops and Bubbles: Drops and Bubbles
Type
Papers
Information
Journal of Fluid Mechanics , Volume 742 , 10 March 2014 , pp. 425 - 445
Copyright
© 2014 Cambridge University Press 

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