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Updated: Aug 27, 2025

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
Published on: May 9, 2021
Acoustic scattering from a toroidal bubble
Kyle S Spratt1, Kevin M Lee1, Preston S Wilson1
1Applied Research Laboratories, The University of Texas at Austin, Austin, Texas 78713-8029, USA sprattkyle@gmail.com, kevin.lee@arlut.utexas.edu, pswilson@mail.utexas.edu, hamilton@mail.utexas.edu.
Abstract:
A simplified model is presented describing acoustic scattering from a toroidal gas bubble in a compressible liquid. It is assumed that the volume oscillations of the bubble are small enough that a linear approximation is appropriate, and furthermore, that the bubble is large enough that the dominant loss mechanism is radiation damping. An expression for the scattering cross section for such a bubble is derived, and the results are compared with finite-element calculations of the full fluid-fluid scattering problem.
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