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Updated: Aug 23, 2025

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
Published on: May 9, 2021
The left-right symmetrical and asymmetrical deformations in a three-bubble system
Yaorong Wu1, Weizhong Chen1, Lingling Zhang1
1The Key Laboratory of Modern Acoustics, Ministry of Education, Institution of Acoustics, Nanjing University, Nanjing 210093, China.
This study models three-bubble systems, revealing how bubble shape changes (deformations) depend on their arrangement and size. Uniformly spaced identical bubbles show specific deformation patterns, with side bubbles influencing the central one.
Area of Science:
- Fluid dynamics
- Acoustics
- Nonlinear phenomena
Background:
- Understanding bubble dynamics is crucial in various fields, including acoustics and fluid mechanics.
- Previous studies often focused on single bubbles or simpler configurations.
- Investigating multi-bubble systems reveals complex interactions and emergent behaviors.
Purpose of the Study:
- To analyze the simplest system exhibiting left-right symmetry and asymmetry: three bubbles in a line.
- To model the aspherical oscillations of central and side bubbles using Legendre polynomials.
- To understand how bubble separation and size influence deformation patterns.
Main Methods:
- Mathematical modeling of bubble dynamics.
- Using Legendre polynomials (P0, P1, P2) to describe small deformations.
- Analyzing the behavior of uniformly and non-uniformly separated bubbles.
Main Results:
- In uniformly spaced identical bubbles, the central bubble shows P2 deformation, while side bubbles exhibit P1 and P2 components.
- Non-uniform spacing can lead to two-bubble or single-bubble systems with distinct deformation characteristics.
- Asymmetrical side bubble sizes significantly impact the central bubble's deformation.
Conclusions:
- Bubble system configuration dictates deformation modes (P1, P2).
- Interactions in multi-bubble systems lead to complex, size-dependent dynamics.
- This model provides insights into acoustic streaming and cavitation phenomena.
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