Detailed Jet Dynamics in a Collapsing Bubble

[摘要] We present detailed visualizations of the micro-jet forming inside an aspherically collapsing cavitation bubble near a free surface. The high-quality visualizations of large and strongly deformed bubbles disclose so far unseen features of the dynamics inside the bubble, such as a mushroom-like flattened jet-tip, crown formation and micro-droplets. We also find that jetting near a free surface reduces the collapse time relative to the Rayleigh time.

[发布机构] Laboratory for Hydraulic Machines, Ecole Polytechnique Fédérale de Lausanne, Avenue de Cour 33bis, Lausanne; 1007, Switzerland^1;International Centre for Radio Astronomy Research, University of Western Australia, M468 7 Fairway, Crawley; WA; 6009, Australia^2

[关键词] Cavitation bubble;Collapse time;Collapsing bubble;Free surfaces;High quality;Jet dynamics;Micro droplets;Micro jet