Kaiserslautern Intelligent Manufacturing School, Shanghai Dianji University, Shanghai 201306, China.
Key Laboratory of Modern Acoustics, Ministry of Education, Institute of Acoustics, Nanjing University, Nanjing 210093, China.
Ultrason Sonochem. 2022 Mar;84:105952. doi: 10.1016/j.ultsonch.2022.105952. Epub 2022 Feb 14.
This paper investigates the pulsations and translation of bubbles in a double-bubble system driven by burst ultrasound. Results illustrate that for two identical bubbles, decreasing the frequency of burst or increasing its amplitude can enhance the pulsations and improve the translation velocities of bubbles. In a certain scope, large bubble brings about fast translation velocity, but the velocity will fall down for too large bubble, such as the bubble with ambient radius over about its resonance radius. When the ambient radii of two bubbles are different, translation of the large bubble is smaller than that of the small bubble. In addition, the effect of initial distance between bubbles is described as well. If burst serials are used, shortening the time interval between each burst and improving the acoustic amplitude of bursts are beneficial for the translations of bubbles.
本文研究了在爆裂超声驱动下双气泡系统中的气泡脉动和迁移。结果表明，对于两个相同的气泡，降低爆裂的频率或增加其幅度可以增强气泡的脉动并提高气泡的迁移速度。在一定范围内，大气泡会带来较快的迁移速度，但对于过大的气泡，速度会下降，例如环境半径超过其共振半径的气泡。当两个气泡的环境半径不同时，大气泡的迁移速度会小于小气泡。此外，还描述了气泡初始间距的影响。如果使用爆裂序列，缩短每个爆裂之间的时间间隔并提高爆裂的声幅有利于气泡的迁移。
