Dynamics of twin bubbles formed by ultrasonic cavitation in a liquid

Based on potential flow and perturbation theory, a theoretical model is derived to describe the pulsation, translation, and deformation of twin bubbles in an ultrasound field. The amplitudes of radial oscillation, translation, and deformation of twin bubbles are found to depend on initial translation velocities. The radii, translation, and deformation of twin bubbles also exhibit periodic behavior. As the initial translation velocities increase, the periods of two bubbles' oscillations reduce, and the instable area in the phase space of R-01 -R-02 enlarges because of the interaction between bubbles.

Automated summary

A theoretical model is proposed to describe the pulsation, translation, and deformation of twin bubbles in an ultrasound field based on potential flow and perturbation theory. The amplitudes of bubbles' oscillations are found to be dependent on initial translation velocities, with the periods of oscillations decreasing as initial translation velocities increase. The interaction between bubbles causes the instable area in the phase space to enlarge.