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Related Experiment Video

Updated: Feb 22, 2026

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

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Published on: May 9, 2021

Numerical study of acoustically driven bubble cloud dynamics near a rigid wall.

Jingsen Ma¹, Chao-Tsung Hsiao¹, Georges L Chahine¹

¹Dynaflow, Inc., 10621-J Iron Bridge Road, Jessup, MD, USA.

Ultrasonics Sonochemistry

|September 27, 2017

Summary

This study reveals that increased excitation pressure amplitude amplifies nonlinear bubble cloud dynamics, leading to higher wall pressure loads. Resonance frequency significantly impacts collective bubble behavior and pressure peaks.

Keywords:

Bubble cloud Bubble dynamics Cavitation Cleaning Erosion

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Published on: January 10, 2017

Area of Science:

Fluid dynamics
Acoustics
Multiphase flow

Background:

Bubble clouds near rigid boundaries are common in various applications.
Understanding their dynamics is crucial for predicting forces and acoustic loads.
Existing models often simplify bubble interactions and nonlinear effects.

Purpose of the Study:

To investigate the dynamics of a bubble cloud under sinusoidal pressure excitation near a rigid wall.
To analyze the influence of excitation parameters and bubble characteristics on collective behavior and wall pressure.
To explore nonlinear effects and resonance phenomena in bubble cloud dynamics.

Main Methods:

Development and application of a novel Eulerian/Lagrangian two-phase flow model.
Numerical simulation of bubble cloud behavior under varying sinusoidal pressure fields.
Systematic investigation of parameters: excitation amplitude/frequency, bubble size, void fraction, standoff distance.

Main Results:

Nonlinear bubble cloud dynamics and wall pressure loads increase with excitation pressure amplitude.
A preferred resonance frequency drives the strongest collective bubble behavior.
At resonance, pressure peaks can exceed excitation pressure by orders of magnitude due to bubble interactions.
Numerically obtained resonance frequency differs from linear theory predictions.
Resonance frequency decreases with increasing excitation amplitude relative to ambient pressure at high amplitudes.

Conclusions:

Nonlinear effects significantly alter bubble cloud dynamics and pressure loads near walls.
Resonance phenomena play a critical role, leading to amplified pressure peaks.
The developed model captures complex bubble cloud interactions not described by linear acoustics.