Numerical investigation on acoustic cavitation characteristics of an air-vapor bubble: Effect of equation of state for interior gases

被引:20
作者
Qin, Dui [1 ,2 ,4 ]
Lei, Shuang [1 ]
Chen, Bo [1 ]
Li, Zhangyong [1 ]
Wang, Wei [1 ,4 ]
Ji, Xiaojuan [2 ,3 ,4 ]
机构
[1] Chongqing Univ Posts & Telecommun, Sch Bioinformat, Dept Biomed Engn, Chongqing, Peoples R China
[2] Chongqing Gen Hosp, Postdoctoral Workstn, Chongqing, Peoples R China
[3] Chongqing Gen Hosp, Dept Ultrasound, Chongqing, Peoples R China
[4] 2 Chongwen Rd, Chongqing 400065, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Acoustic cavitation; Bubble collapse; Equation of state; Peng -Robinson equation; Van der Waals equation; CUBIC EQUATIONS; SINGLE BUBBLE; WATER-VAPOR; DYNAMICS; SONOLUMINESCENCE; FREQUENCY; INTENSITY; COMPRESSIBILITY; DEGRADATION; FORMULATION;
D O I
10.1016/j.ultsonch.2023.106456
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
The cavitation dynamics of an air-vapor mixture bubble with ultrasonic excitation can be greatly affected by the equation of state (EOS) for the interior gases. To simulate the cavitation dynamics, the Gilmore-Akulichev equation was coupled with the Peng-Robinson (PR) EOS or the Van der Waals (vdW) EOS. In this study, the thermodynamic properties of air and water vapor predicted by the PR and vdW EOS were first compared, and the results showed that the PR EOS gives a more accurate estimation of the gases within the bubble due to the less deviation from the experimental values. Moreover, the acoustic cavitation characteristics predicted by the Gilmore-PR model were compared to the Gilmore-vdW model, including the bubble collapse strength, the temperature, pressure and number of water molecules within the bubble. The results indicated that a stronger bubble collapse was predicted by the Gilmore-PR model rather than the Gilmore-vdW model, with higher temperature and pressure, as well as more water molecules within the collapsing bubble. More importantly, it was found that the differences between both models increase at higher ultrasound amplitudes or lower ultra-sound frequencies while decreasing as the initial bubble radius and the liquid parameters (e.g., surface tension, viscosity and temperature of the surrounding liquid) increase. This study might offer important insights into the effects of the EOS for interior gases on the cavitation bubble dynamics and the resultant acoustic cavitation-associated effects, contributing to further optimization of its applications in sonochemistry and biomedicine.
引用
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页数:11
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