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Updated: Jun 27, 2025

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
Published on: May 9, 2021
A new model for bubble cluster dynamics in a viscoelastic media.
Xiaozhuo Shen1, Pengfei Wu1, Weijun Lin1
1State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China.
This study models bubble cluster dynamics in viscoelastic media. Bubble clusters alternately promote or suppress bubble vibration with frequency, with effects often reduced at high acoustic pressures.
Area of Science:
- Acoustics
- Fluid Dynamics
- Biomedical Engineering
Background:
- Bubble clusters are crucial for ultrasound diagnosis and therapy.
- Understanding bubble cluster dynamics in viscoelastic media is essential for optimizing ultrasound applications.
Purpose of the Study:
- To propose a statistical model for bubble cluster dynamics in viscoelastic media.
- To investigate the influence of bubble radius distribution on cluster behavior.
Main Methods:
- Developed a statistical model for bubble cluster dynamics.
- Compared bubble responses in single-bubble, multi-bubble (uniform radius), and multi-bubble (varying radius) conditions.
Main Results:
- Bubble cluster effects on vibration are non-monotonous with bubble number.
- Vibration promotion/suppression alternates with driving frequency.
- High acoustic pressure (5000 kPa) generally suppresses cluster effects.
- Large bubbles (10 μm) experience less suppression or more promotion.
Conclusions:
- Bubble cluster dynamics are complex and depend on bubble number, radius distribution, frequency, and acoustic pressure.
- The findings provide insights into optimizing ultrasound diagnosis and therapy by controlling bubble behavior.
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