Dynamics Characterization of the Acoustically Driven Single Microbubble near the Rigid and Elastic Wall

Abstract

The dynamic behaviors of single acoustic bubble are the key fundamental problem in exploring the mechanism of acoustic cavitation. In this paper, a synchronous high-speed microscopic imaging method is proposed to clearly record the temporary evolution of single bubble in low-frequency ultrasonic field. In the experiment, the temporal evolution of the bubble with two different initial radii in an ultrasonic field are recorded by the high-speed camera at 300 000 frames per second, and other important characteristics of the bubbles are calculated and analyzed. In these experiments, the single bubbles behave similar under the same relative distance from a rigid wall, but the dynamic behaviors of the bubble with different initial radii have obvious difference. In addition, the bubble dynamics of the bubble near an elastic wall are also investigated and compared to the bubble near the rigid wall. It is found that the elasticity would significantly influence the dynamic characteristics during bubble collapse and rebound. In this work, the synchronous high-speed microscopic imaging method demonstrates the abilities to experimentally investigate the rapidly dynamics of single bubble in ultrasonic field.