The Key Laboratory of Modern Acoustics, Ministry of Education, Institution of Acoustics, Nanjing University, Nanjing 210093, China.
The Key Laboratory of Modern Acoustics, Ministry of Education, Institution of Acoustics, Nanjing University, Nanjing 210093, China.
Ultrason Sonochem. 2022 Jan;82:105865. doi: 10.1016/j.ultsonch.2021.105865. Epub 2021 Dec 8.
A model of cavitation bubbles is derived in liquid confined in an elastic sealed vessel driven by ultrasound. In this model, an assumption that the pressure acting on the sealed vessel due to bubble pulsations is proportional to total volume change of bubbles is made. Numerical simulations are carried out for a single bubble and for bubbles. The results show that the pulsation of a single bubble can be suppressed to a large extent in sealed vessel, and that of two matched bubbles with same ambient radius can be further suppressed. However, when two mismatched bubbles have the same ambient radii, an interesting breathing phenomenon takes place, where one bubble pulsates inversely with the other one. Due to this breathing phenomenon the suppression effect becomes weak, so the maximum radii of two mismatched bubbles can be larger than that of a single bubble or that of two matched bubbles in sealed vessel. Besides that, for two mismatched bubbles with different ambient radii, the small one in sealed vessel under some certain parameters can pulsate as strong as or even stronger than that of a single bubble in an open vessel.
在超声驱动下，研究了充满在弹性密封容器中的受限液体中的空化泡模型。在该模型中，假设由于气泡脉动作用在密封容器上的压力与气泡总体积变化成正比。对单个气泡和多个气泡进行了数值模拟。结果表明，在密封容器中可以在很大程度上抑制单个气泡的脉动，而对于具有相同环境半径的两个匹配气泡可以进一步抑制。但是，当两个不匹配的气泡具有相同的环境半径时，会发生有趣的呼吸现象，其中一个气泡与另一个气泡的脉动相反。由于这种呼吸现象，抑制效果减弱，因此两个不匹配气泡的最大半径可以大于密封容器中单个气泡或两个匹配气泡的最大半径。此外，对于具有不同环境半径的两个不匹配气泡，在某些特定参数下，密封容器中的小气泡的脉动可以与开放容器中的单个气泡一样强，甚至更强。
