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On the Rebounds of Spherical and Deformed Cavitation Bubbles

Excerpt

As a single cavitation bubble collapses, its energy is distributed into several powerful phenomena that contribute to its erosive potential. These events are the emission of shock waves that can reach GPa-level pressures, microjets reaching speeds of hundreds of ms−1, and the extreme heating up to temperatures in the order of 10,000 K, which may yield light emission called luminescence. Much of what is left of the bubble’s energy from its redistribution to these violent collapse effects goes to the formation of a rebound bubble, which will undergo its own collapse and can produce further damage. Here, we experimentally investigate the effect of a bubble’s deformation on its rebound using single laser-induced bubbles deformed by gravity. While the driving pressure also affects the rebound dynamics, the bubble deformation dominates over its effect on the rebound beyond a certain level of pressure field anisotropy. Thanks to micro-gravity conditions, we are able to decouple the effects of the driving pressure and the gravity on the rebound.

Introduction
Experimental Setup
Results
Discussion
Conclusion
Acknowledgements
References
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