Research on Dynamic Process and Droplet Splash of Laser-Induced Cavitation Bubble Collapse within a Droplet

Abstract

The cavitation bubble within a droplet is one of the frontier topics in bubble dynamics, with applications in many industrial fields. In the present paper, the dynamics of the cavitation bubble wall and the droplet surface, with different radius ratios, are compared and analyzed. The relationship between cavitation bubble collapse and droplet splash is disclosed. Research shows that, firstly, under the same type of splash, there is a positive correlation between the radius ratio with the displacement of the feature point and the distance between the two ends of the X-axis. It shows that the splash becomes more prominent with the radius ratio increase. Secondly, under different splash cases, the radius ratio also shows a significant impact on the trend of interface displacement and the splash dynamics. In addition, as the radius ratio increases the modification coefficient of the collapse time being smaller.