title: Dynamics of two interacting bubbles in a nonspherical ultrasound field.
abstract: In this paper, we present and analyze a model of the oscillations of a pair of gas bubbles driven by nonspherical ultrasound. We derived our model based on the perturbation and potential flow theories and use it to study three cases of oscillation of two bubbles under driving ultrasound with different initial phases, different separation distances between the bubbles and different sound pressure amplitudes. For the driving ultrasound with different initial phases, we obtain the in-phase and anti-phase radial pulsations of the bubbles in incompressible liquid. We also study the effect of the secondary Bjerknes force on the oscillation of bubbles separated by different relative distances. Lastly, we analyze the ratio of a nonspherical to a spherical partial quantity, and the results show that the bubbles survive longer with decreases in both the pressure amplitude of nonspherical ultrasound and the initial bubbles radii.
authors.affiliation: School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, China. Electronic address: liang.shi2007@163.com.
authors.forename: Jinfu
authors.initials: J
authors.lastname: Liang
authors.affiliation: The Key Laboratory of Modern Acoustics, Ministry of Education, Institution of Acoustics, Nanjing University, Nanjing 210093, China.
authors.forename: Xun
authors.initials: X
authors.lastname: Wang
authors.affiliation: The Key Laboratory of Modern Acoustics, Ministry of Education, Institution of Acoustics, Nanjing University, Nanjing 210093, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Yang
authors.affiliation: School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, China.
authors.forename: Lunxun
authors.initials: L
authors.lastname: Gong
keywords: Cavitation bubbles; Dynamics; Nonspherical ultrasound field