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Memory effect and redistribution of cavitation nuclei in a thin liquid layer |
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| Affiliation: | 1. State Key Laboratory of Advanced Welding & Joining, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, PR China;2. Department of Mechanical Engineering, Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Tsinghua University, Beijing 100084, PR China;3. College of Material Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China |
| Abstract: | Temporal evolution and spatial distribution of acoustic cavitation structures in a thin liquid layer were investigated experimentally with high-speed photography. The inception and disappearance processes of cavitation bubble cloud revealed that the metastable cavitaton structures formed in the thin liquid layer caused a long-term “memory effect”. A factor which weakens the memory effect was identified. The distribution of cavitation nuclei was investigated by changing the temporal decay of the memory effect. |
| Keywords: | Ultrasonic cavitation Cavitation structure Nuclei Memory effect |
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