Tao Feng, Zhao Guo-Ying, Chen Wei-Zhong, Tao Duo
School of Electrical and Information Engineering, Anhui University of Technology, Ma'anshan 243002, China.
School of Computer Science and Technology, Anhui University of Technology, Ma'anshan 243002, China.
Ultrason Sonochem. 2024 Nov;110:107022. doi: 10.1016/j.ultsonch.2024.107022. Epub 2024 Aug 19.
In the work, the 1/2 order subharmonic wave of two coupling cavitation bubbles is investigated numerically via Fourier spectrum analysis. By analyzing the dynamics of bubble, we find that the mutual interaction between bubbles can affect the appearance of 1/2 order subharmonic. The results of parameter dependence show that the intensity of 1/2 order subharmonic would be promoted or inhibited with the increase of mutual interaction. The higher the driving amplitude or the smaller the distance between bubbles, the stronger the mutual interaction is, and also the greater the promotion or suppression of the 1/2 order subharmonic is. Moreover, while the 1/2 order subharmonic occurs, the energy of bubble would alternate between two different peaks, and the temperature inside bubble has a similar fluctuation while the bubble collapses. This qualitative analysis suggests that the bubble's dynamics for multi-bubble case is complex. Understanding the generation of subharmonic of bubble's dynamics is of great significance for helpful applying of cavitation bubble.
在这项工作中，通过傅里叶频谱分析对两个耦合空化泡的1/2阶次谐波进行了数值研究。通过分析泡的动力学特性，我们发现泡之间的相互作用会影响1/2阶次谐波的出现。参数相关性结果表明，随着相互作用的增强，1/2阶次谐波的强度会增强或受到抑制。驱动振幅越高或泡之间的距离越小，相互作用越强，1/2阶次谐波的增强或抑制作用也越大。此外，当出现1/2阶次谐波时，泡的能量会在两个不同的峰值之间交替，并且在泡崩溃时泡内温度有类似的波动。这种定性分析表明多泡情况下泡的动力学特性很复杂。理解泡动力学中次谐波的产生对于空化泡的有益应用具有重要意义。
