LAUSR

The interactions between a laser-generated cavitation bubble and a spherical particle are investigated experimentally with the aid of high-speed camera. Both the cavitation bubble dynamics and its induced particle moving dynamics are clearly recorded and analyzed qualitatively and quantitatively. Influences of two essential parameters (including the bubble-particle distance and the particle/bubble radius ratio) on the phenomenon are given and discussed. Furthermore, the underlying physical mechanisms are discussed based on the calculations of the radiation pressure and the generations of the micro-jet. Our results reveal that the distance between the cavitation bubble and the particle shows significant influences on the phenomenon. For different radius ratios, the maximum particle displacement varies especially for the small stand-off distance.