Yang Yu, Shan Minglei, Kan Xuefen, Duan Kangjun, Han Qingbang, Juan Yue
College of Information Science and Technology, Nanjing Forestry University, Nanjing 210037, China.
Jiangsu Key Laboratory of power Transmission and Distribution Equipment Technology, Hohai University, Changzhou 213022, China.
Heliyon. 2023 Oct 12;9(10):e20532. doi: 10.1016/j.heliyon.2023.e20532. eCollection 2023 Oct.
In this paper, an improved multicomponent lattice Boltzmann model is employed to investigate the impact of the gas properties, specifically the gas adiabatic index, on the thermodynamic effects of cavitation bubble collapse. The study focuses on analyzing the temperature evolution in the flow field and the resulting thermal effects on the surrounding wall. The accuracy of the developed model is verified through comparisons with analytical solutions of the Rayleigh-Plesset equation and the validation of the adiabatic law. Then, a thermodynamic model of cavitation bubble composed of two-mixed gases collapsing near a wall is established to explore the influence of the gas adiabatic index on the temperature behavior. Key findings include the observation that the affects the temperature of the first collapse significantly, while its influence on the second collapse is minimal. Additionally, the presence of low-temperature regions near the bubble surface during collapse impacts both bubble and wall temperatures. The study also demonstrates that the affects maximum and minimum wall temperatures. The results have implications for selecting specific non-condensable gas properties within cavitation bubbles for targeted cooling or heating purposes, including potential applications in electronic component cooling and environmental refrigeration.
在本文中，采用一种改进的多组分格子玻尔兹曼模型来研究气体性质，特别是气体绝热指数，对空化泡溃灭热力学效应的影响。该研究聚焦于分析流场中的温度演化以及对周围壁面产生的热效应。通过与瑞利 - 普莱斯方程的解析解进行比较以及对绝热定律的验证，证实了所建立模型的准确性。然后，建立了一个由两种混合气体组成的空化泡在壁面附近溃灭的热力学模型，以探究气体绝热指数对温度行为的影响。主要发现包括：观察到气体绝热指数对首次溃灭的温度有显著影响，而对第二次溃灭的影响极小。此外，溃灭过程中气泡表面附近存在的低温区域会影响气泡和壁面的温度。该研究还表明，气体绝热指数会影响壁面的最高和最低温度。这些结果对于在空化泡内选择特定的不可凝气体性质以实现有针对性的冷却或加热目的具有启示意义，包括在电子元件冷却和环境制冷中的潜在应用。
