Amplification of Supersonic Microjets by Resonant Inertial Cavitation-Bubble Pair
Yuzhe Fan, Alexander Bußmann, Fabian Reuter, Hengzhu Bao, Stefan Adami, José Manuel Gordillo, Nikolaus A. Adams, Claus‐Dieter Ohl
Abstract
We reveal for the first time by experiments that within a narrow parameter regime, two cavitation bubbles with identical energy generated in antiphase develop a supersonic jet. High-resolution numerical simulation shows a mechanism for jet amplification based on toroidal shock wave and bubble necking interaction. The microjet reaches velocities in excess of 1000 m s^{-1}. We demonstrate that potential flow theory established for Worthington jets accurately predicts the evolution of the bubble gas-liquid interfaces unifying compressible and incompressible jet amplification.
Topics & Concepts
BubbleSupersonic speedPhysicsCavitationJet (fluid)CompressibilityShock waveToroidMechanicsShock (circulatory)Choked flowPlasmaNuclear physicsInternal medicineMedicineUltrasound and Cavitation PhenomenaFluid Dynamics and Heat TransferParticle Dynamics in Fluid Flows