Simulation of growth and collapse processes of near-wall cavitation bubbles with lattice Boltzmann method
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(1.School of Shipping and Naval Architecture, Chongqing Jiaotong University, Chongqing 400074, China;2.Baise Hub Navigation Investment Co., Ltd., Baise 533000, China;3.Southwest Research Institute for Hydraulic and Water Transport Engineering, Chongqing Jiaotong University, Chongqing 400074, China)

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TV13

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    Abstract:

    Based on the coupled hydro-thermodynamic lattice Boltzmann model, and considering the interaction between the flow field and the temperature field, the growth and collapse processes of the cavitation bubbles in the near wall region were systematically investigated. The influence of the wall-bubble dimensionless distance and initial input temperature on the bubble morphology evolution process and the collapse intensity were analyzed. Furthermore, the differences between the results obtained by the coupled hydro-thermodynamic model and the passive scalar model were proposed. The results indicate that the relationship between the dimensionless distance and the maximum radius represents a power law if the bubble cannot keep its roundness during the growth stage due to the restriction of the wall. It shows a linear relationship if the dimensionless distance is greater than 1.6. A linear relationship exists between the input energy and the maximum radius, while a power law exists between the initial input dimensionless temperature and the maximum radius. The effect of high temperature on the gas-liquid interface is considered in the coupled hydro-thermodynamic method and compared to the passive scalar method, a larger jet volume and more concentrated jets with lower collapse intensity can be obtained during collapse stage.

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冉彬君,汪磊,袁浩,等.基于格子玻尔兹曼方法的近壁区空化泡生长溃灭过程模拟[J].水利水电科技进展,2023,43(5):32-37.(RAN Binjun, WANG Lei, YUAN Hao, et al. Simulation of growth and collapse processes of near-wall cavitation bubbles with lattice Boltzmann method[J]. Advances in Science and Technology of Water Resources,2023,43(5):32-37.(in Chinese))

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  • Received:October 26,2022
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  • Online: September 18,2023
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