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Updated: Dec 5, 2025

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
Published on: May 9, 2021
Secondary radiation force between two closely spaced acoustic bubbles
Gabriel Regnault1, Cyril Mauger1, Philippe Blanc-Benon1
1Univ Lyon, École Centrale de Lyon, INSA Lyon, CNRS, LMFA UMR 5509, F-69134 Écully, France.
Abstract:
Two acoustic bubbles may attract or repel due to the secondary radiation force acting on them. We use here a dual-frequency levitation chamber in order to trap two oscillating microbubbles at close, fixed distance, and to perform measurements of the interaction force. We successfully compare our measurements to a commonly used theoretical model that assumes linear spherical oscillations, and disregards attenuation and multiple scattering between bubbles. The deviation from the model arises when nonspherical surface oscillations are triggered, leading to an additional hydrodynamic force induced by second-order liquid flow.
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