Amplification of supersonic micro-jets by resonant inertial cavitation-bubble pair

Abstract

We reveal for the first time by experiments that within a narrow parameter regime, two cavitation bubbles with identical energy generated in anti-phase develop a supersonic jet. High-resolution numerical simulation shows a mechanism for jet amplification based on toroidal shock wave and bubble necking interaction. The micro-jet reaches velocities in excess of 1000 m/s. We demonstrate that potential flow approximation established for Worthington jets accurately predicts the evolution of the bubble gas-liquid interfaces.

arXiv comment17 pages, 8 figures

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Cited by in corpus (4)

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• New insights into the cavitation erosion by bubble collapse at moderate stand-off distances
• Shape modes and jet formation on ultrasound-driven wall-attached bubbles
• Supersonic jet dynamics from two-cavitation-bubble interactions: acceleration, tip fragmentation and penetration