Bubble translation driven by pulsation in a double-bubble system |
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Authors: | Ling-Ling Zhang Wei-Zhong Chen Yuan-Yuan Zhang Yao-Rong Wu Xun Wang Guo-Ying Zhao |
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Affiliation: | (Key Laboratory of Modern Acoustics(Ministry of Education),Institute of Acoustics,Nanjing University,Nanjing 210093,China) |
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Abstract: | The pulsation and translation of two cavitation bubbles are studied numerically in sound field. The results show that bubbles’ pulsation driven by the sound makes them translate. Different pulsations lead to different translations. Two bubbles will be mutually attractive to each other if they pulsate in phase, while they will be repulsive if out of phase. Furthermore,the secondary Bjerknes force for small phase difference is attractive, and it becomes repulsive for other phase differences up to π phase difference due to the nonlinear effect, although the attractive strength between two bubbles is much larger than the repulsive strength. Finally, one bubble pulsation and the other bubble stationary make the bubbles repel each other. |
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Keywords: | double bubble dynamics pulsation translation phase difference |
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