Observation of the Formation of Multiple Shock Waves at the Collapse of Cavitation Bubbles for Improvement of Energy Convergence

Observation of the Formation of Multiple Shock Waves at the Collapse of Cavitation Bubbles for Improvement of Energy Convergence

Blog Article

The collapse of a cavitation bubble is always Baby Diaper associated with the radiation of intense shock waves, which are highly relevant in a variety of applications.To radiate a strong shock wave, it is necessary to converge energy at the collapse, and understanding generation processes of multiple shock waves at the collapse is a key issue.In the present study, we investigated the formation of multiple shock waves generated by the collapse of a laser-induced bubble.We used a high-speed imaging system with unprecedented spatiotemporal resolution.

We developed a triggering procedure of high precision and reproducibility based on the deflection of a laser beam by the shockwave passage.The high-speed videos clearly show that: (A) a first shockwave is emitted as the micro-jet hits the bottom of the bubble interface, followed by a second shock wave due to Transmission Rack the collapse of the remaining toroidal bubble; (B) a sequential collapse of elongated bubbles, where the top part of the bubble collapses slightly before the bottom of the bubble; and (C) the formation of compression shock waves from multiple sites on a toroidal bubble.