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The evolution of the cavitation bubble driven by different sound pressure
Wei Huang1, Weizhong Chen, Ya'nan Liu
1State Key Laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University, Nanjing 210093, China.
Ultrasonics
|June 20, 2006
Summary
Acoustic cavitation bubble size (R(0)) initially shrinks then expands with increasing sound pressure. This study reveals how sound pressure impacts bubble dynamics and compression ratios.
Area of Science:
- Acoustics
- Fluid Dynamics
- Physical Chemistry
Background:
- Acoustic cavitation involves bubble dynamics under sound pressure.
- Understanding bubble behavior is crucial for various applications.
Purpose of the Study:
- Investigate the relationship between ambient radius R(0) of acoustic cavitation bubbles and driving pressure.
- Analyze how sound pressure influences bubble evolution and compression ratio.
Main Methods:
- Utilized a long-distance microscope and a 532 nm laser.
- Employed the Rayleigh-Plesset equation for numerical fitting to experimental data.
- Determined ambient radius R(0) by matching calculations with observations.
Main Results:
- Ambient radius R(0) decreased with initial sound pressure increase, then rose after 1.2 atm.
- Maximum radius R(m) followed a similar trend with sound pressure.
- The ratio R(m)/R(0) exhibited monotonic variation with sound pressure.
Conclusions:
- Sound pressure affects acoustic cavitation bubble size in a non-linear manner.
- Increased sound pressure enhances bubble compression ratio, even with increased internal mass.
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