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Bubble oscillations driven by aspherical ultrasound in liquid
Wenjie Wang1, Weizhong Chen, Meijun Lu
1Institute of Acoustics, State Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093, China.
The Journal of the Acoustical Society of America
|November 1, 2003
Summary
This study explores aspherical bubble dynamics under acoustic fields. Results show stable oscillations and controllable distortion, expanding beyond spherical perturbation theories.
Area of Science:
- Fluid dynamics
- Acoustics
- Bubble dynamics
Background:
- Spherical perturbation theory has limitations in explaining complex bubble behaviors.
- Understanding aspherical bubble dynamics is crucial for various acoustic applications.
Purpose of the Study:
- To investigate bubble dynamics driven by an aspherical acoustic field.
- To derive and analyze evolution equations for aspherical bubbles.
- To compare findings with existing spherical perturbation theories.
Main Methods:
- Hydrodynamic theory
- Derivation of evolution equations for aspherical bubbles
- Numerical calculations
Main Results:
- Aspherical bubbles can exhibit stable, periodic oscillations under specific conditions.
- Aspherical distortion can be controlled: it may grow rapidly, causing breakdown, or decay, leading to a spherical shape.
- Findings extend beyond the scope of spherical perturbation theory.
Conclusions:
- Aspherical acoustic fields offer novel ways to control bubble dynamics.
- The study provides a theoretical framework for understanding non-spherical bubble behavior.
- Results have implications for fields utilizing acoustic cavitation and bubble manipulation.
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