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Volume 16
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10.3390/app16073154
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Article

Collapse Dynamics of Unequal-Sized Dual Cavitation Bubbles

by
Wenrui Xue
1,
Jihao Xie
1,
Guanghua Wang
1,
Daqing He
1,
Xiaoyu Wang
1,*,
Yuning Zhang
1,
Jinsen Hu
2 and
Xu Qiu
3
1
Key Laboratory of Power Station Energy Transfer Conversion and System (Ministry of Education), School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
2
School of Mechanical Engineering, Ningxia University, Yinchuan 750021, China
3
China Atomic Energy Publishing & Media Company Limited, Beijing 100048, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2026, 16(7), 3154; https://doi.org/10.3390/app16073154
Submission received: 21 February 2026 / Revised: 20 March 2026 / Accepted: 23 March 2026 / Published: 25 March 2026
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Abstract

In engineering flow systems such as hydraulic machinery and marine propulsion, interactions among cavitation bubbles can significantly influence collapse dynamics. This study investigates the collapse behavior of unequal-sized dual cavitation bubbles in a free field, focusing on jet formation modes, morphological evolution, and the characteristics of the Bjerknes force and Kelvin impulse. Particular emphasis is placed on the effect of the bubble radius ratio on the collapse dynamics. The results indicate that: (1) as the radius ratio decreases, the counter-directed jets formed during the collapse of dual cavitation bubbles gradually disappear; (2) with a decreasing radius ratio, the amplitude of the bubble wall velocity first decreases and then increases; and (3) both the Bjerknes force and the Kelvin impulse decrease as the radius ratio decreases.
Keywords: cavitation bubble collapse; dual-bubble interaction; Bjerknes force; Kelvin impulse cavitation bubble collapse; dual-bubble interaction; Bjerknes force; Kelvin impulse

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MDPI and ACS Style

Xue, W.; Xie, J.; Wang, G.; He, D.; Wang, X.; Zhang, Y.; Hu, J.; Qiu, X. Collapse Dynamics of Unequal-Sized Dual Cavitation Bubbles. Appl. Sci. 2026, 16, 3154. https://doi.org/10.3390/app16073154

AMA Style

Xue W, Xie J, Wang G, He D, Wang X, Zhang Y, Hu J, Qiu X. Collapse Dynamics of Unequal-Sized Dual Cavitation Bubbles. Applied Sciences. 2026; 16(7):3154. https://doi.org/10.3390/app16073154

Chicago/Turabian Style

Xue, Wenrui, Jihao Xie, Guanghua Wang, Daqing He, Xiaoyu Wang, Yuning Zhang, Jinsen Hu, and Xu Qiu. 2026. "Collapse Dynamics of Unequal-Sized Dual Cavitation Bubbles" Applied Sciences 16, no. 7: 3154. https://doi.org/10.3390/app16073154

APA Style

Xue, W., Xie, J., Wang, G., He, D., Wang, X., Zhang, Y., Hu, J., & Qiu, X. (2026). Collapse Dynamics of Unequal-Sized Dual Cavitation Bubbles. Applied Sciences, 16(7), 3154. https://doi.org/10.3390/app16073154

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