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Updated: Jun 27, 2026

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Published on: May 9, 2021

Effective medium method for sound propagation in a soft medium containing air bubbles.

Bin Liang¹, Xinye Zou, Jianchun Cheng

¹Laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University, Nanjing 210093, People's Republic of China.

The Journal of the Acoustical Society of America

|December 3, 2008

Summary

A new effective medium method (EMM) models nonlinear acoustic wave propagation in bubbly soft media, considering bubble dynamics and material properties. This method accurately predicts wave behavior and enhances understanding of acoustic properties in complex materials.

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Area of Science:

Acoustics
Materials Science
Nonlinear Dynamics

Background:

Soft media with air bubbles exhibit complex acoustic behaviors.
Previous models often neglect crucial factors like viscosity and surface tension.
Accurate modeling is essential for applications in medical imaging and material characterization.

Purpose of the Study:

To develop an effective medium method (EMM) for investigating nonlinear acoustic wave propagation in bubbly soft media.
To incorporate effects of weak compressibility, viscosity, surface tension, and encapsulating shells into the model.
To derive and solve equations for fundamental and second harmonic waves.

Main Methods:

Developed an effective medium method (EMM) based on an individual bubble dynamics model.
Employed a perturbation approach to homogenize bubbly soft media.
Derived and solved wave propagation equations for 1D and 3D cases.

Main Results:

The EMM accurately models nonlinear acoustic wave propagation in bubbly soft media.
The method incorporates effects of compressibility, viscosity, surface tension, and shell properties.
Results show good agreement with existing theories while accounting for additional physical phenomena.

Conclusions:

The developed EMM provides a robust framework for analyzing acoustic wave propagation in bubbly soft materials.
The method's ability to include multiple physical effects enhances predictive accuracy.
Identified limitations of the EMM for future research and refinement.