Manipulating bubbles with secondary Bjerknes forces

Gas bubbles in a sound field are submitted to a radiative force, known as the secondary Bjerknes force. We propose an original experimental setup that allows us to investigate in detail this force between two bubbles, as a function of the sonication frequency, as well as the bubbles radii and distan...

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Bibliographic Details
Published in:Applied physics letters 2015-11, Vol.107 (21)
Main Authors: Lanoy, Maxime, Derec, Caroline, Tourin, Arnaud, Leroy, Valentin
Format: Article
Language:English
Subjects:
ACCURACY
Acoustic coupling
Applied physics
BUBBLES
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Condensed Matter
COUPLING
DISTANCE
Fluid Dynamics
Fluid mechanics
Mechanics
MULTIPLE SCATTERING
Physics
Soft Condensed Matter
SOUND WAVES
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Summary:Gas bubbles in a sound field are submitted to a radiative force, known as the secondary Bjerknes force. We propose an original experimental setup that allows us to investigate in detail this force between two bubbles, as a function of the sonication frequency, as well as the bubbles radii and distance. We report the observation of both attractive and, more interestingly, repulsive Bjerknes force, when the two bubbles are driven in antiphase. Our experiments show the importance of taking multiple scatterings into account, which leads to a strong acoustic coupling of the bubbles when their radii are similar. Our setup demonstrates the accuracy of secondary Bjerknes forces for attracting or repealing a bubble, and could lead to new acoustic tools for noncontact manipulation in microfluidic devices.
ISSN:0003-6951
1744-683X
1077-3118
1744-6848
DOI:10.1063/1.4936259