Amplification of Supersonic Microjets by Resonant Inertial Cavitation-Bubble Pair

• DOI: 10.1103/physrevlett.132.104004
• Publication Date: 2024-03-08T15:24:16Z
• Authors: Yuzhe Fan; Alexander Bußmann; Fabian Reuter; Hengzhu Bao; Stefan Adami; José M. Gordillo; Nikolaus Adams; Claus-Dieter Ohl
• Keywords: Phase interfaces; Cavitation; Ductile fracture; Jets; Fluid Dynamics (physics.flu-dyn); Amplification; Incompressible flow; FOS: Physical sciences; Physics - Fluid Dynamics

17 pages, 8 figures<br/>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.<br/>