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Open AccessArticle

Dynamic Characteristics of Bubble Collapse Near the Liquid-Liquid Interface

1
Institute of Fluid Measurement and Simulation, China Jiliang University, Hangzhou 310018, China
2
College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China
3
LEO Group Co., Ltd., Wenling 317500, China
*
Authors to whom correspondence should be addressed.
Water 2020, 12(10), 2794; https://doi.org/10.3390/w12102794
Received: 21 August 2020 / Revised: 2 October 2020 / Accepted: 5 October 2020 / Published: 8 October 2020
(This article belongs to the Section Hydraulics and Hydrodynamics)
Bubble collapse near the liquid-liquid interface was experimentally studied in this paper, and the dynamic evolution of a laser-induced bubble (generation, expansion, and collapse) and the liquid-liquid interface (dent and rebound) were captured by a high-speed shadowgraph system. The effect of the dimensionless distance between the bubble and the interface on the direction of the liquid jet, the direction of bubble migration, and the dynamics of bubble collapse were discussed. The results show that: (1) The jet generated during bubble collapse always directs toward the denser fluid; (2) bubble collapses penetrate the interface when the bubble is close to the interface; (3) three different shapes of the liquid-liquid interface—that is, a mushroom-shaped liquid column, a spike droplet, and a spherical liquid droplet—were observed. View Full-Text
Keywords: bubble collapse; interface rebound; density; laser-induced cavitation bubble collapse; interface rebound; density; laser-induced cavitation
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Yin, Z.; Huang, Z.; Tu, C.; Gao, X.; Bao, F. Dynamic Characteristics of Bubble Collapse Near the Liquid-Liquid Interface. Water 2020, 12, 2794.

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