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.

17 pages, 8 figures

References in corpus (2)

• Comprehensive analysis of spherical bubble oscillations and shock wave emission in laser-induced cavitation
• Giant bubble pinch-off

Cited by in corpus (4)

• A theoretical model for compressible bubble dynamics considering phase transition and migration
• 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