Wang Hancheng, Jiao Junjie, Pan Xuchao, Qi Yanjie, Shan Feng, Fang Zhong, Wang Chuanting, He Yong
Mechanical Engineering College of Nanjing University of Science and Technology, National Defense Laboratories of ZNDY, Jiangsu, China.
Mechanical Engineering College of Nanjing University of Science and Technology, National Defense Laboratories of ZNDY, Jiangsu, China.
Ultrason Sonochem. 2024 Dec;111:107075. doi: 10.1016/j.ultsonch.2024.107075. Epub 2024 Sep 18.
In this study, we considered the compressible effect on the mutual interaction of two cavitation bubbles by correcting the sound field emitted by one bubble in the radial equations of the other bubble to first order in the Mach number of the flow, and the effect is represented by the incident wave acting on bubbles. The results illustrates that the incident wave can enhance the resonance response at the redistributed resonance frequency, which leads to an increase in radial acceleration and the secondary Bjerknes force, and rapid approach of bubbles. Furthermore, the influence of incident wave on the interaction of bubbles driven at lower frequencies is more significant, due to resonance enhancement caused by the proximity of natural frequencies and frequency multiplications of the external sound field. Our findings reveal that the compressible effect is not only critical to interaction in radial oscillations, but also in translational motion.
在本研究中，我们通过在另一个气泡的径向方程中对一个气泡发出的声场进行马赫数一阶修正，考虑了可压缩性对两个空化气泡相互作用的影响，该影响由作用在气泡上的入射波表示。结果表明，入射波可增强重新分布的共振频率处的共振响应，这导致径向加速度和二级 Bjerknes 力增加，以及气泡快速靠近。此外，由于固有频率接近和外部声场频率倍频引起的共振增强，入射波对低频驱动气泡相互作用的影响更为显著。我们的研究结果表明，可压缩效应不仅对径向振荡中的相互作用至关重要，而且对平移运动也很关键。
