| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Investigation of cavitation bubble collapse in hydrophobic concave using the pseudopotential multi-relaxation-time lattice Boltzmann method |
| Minglei Shan(单鸣雷)1,†, Yu Yang(杨雨)1, 2, Xuemeng Zhao(赵雪梦)1, Qingbang Han(韩庆邦)1, and Cheng Yao(姚澄)1 |
| 1 Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology, Hohai University, Changzhou 213022, China; 2 College of Computer and Information, Hohai University, Nanjing 210000, China |
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Abstract The interaction between cavitation bubble and solid surface is a fundamental topic which is deeply concerned for the utilization or avoidance of cavitation effect. The complexity of this topic is that the cavitation bubble collapse includes many extreme physical phenomena and variability of different solid surface properties. In the present work, the cavitation bubble collapse in hydrophobic concave is studied using the pseudopotential multi-relaxation-time lattice Boltzmann model (MRT-LB). The model is modified by involving the piecewise linear equation of state and improved forcing scheme. The fluid-solid interaction in the model is employed to adjust the wettability of solid surface. Moreover, the validity of the model is verified by comparison with experimental results and grid-independence verification. Finally, the cavitation bubble collapse in a hydrophobic concave is studied by investigating density field, pressure field, collapse time, and jet velocity. The superimposed effect of the surface hydrophobicity and concave geometry is analyzed and explained in the framework of the pseudopotential LBM. The study shows that the hydrophobic concave can enhance cavitation effect by decreasing cavitation threshold, accelerating collapse and increasing jet velocity.
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Received: 10 September 2020
Revised: 28 October 2020
Accepted manuscript online: 01 December 2020
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11874140 and 11574072), the Fund from the State Key Laboratory of Acoustics, Chinese Academy of Sciences (Grant No. SKLA201913), the National Key Research and Development Program of China (Grant No. 2016YFC0401600), and the Postgraduate Research & Practice Innovation Program of Jiangsu Province, China (Grant Nos. 2018B741X14 and KYCX18\textunderscore 0552). |
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Corresponding Authors:
†Corresponding author. E-mail: shanming2003@126.com
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Cite this article:
Minglei Shan(单鸣雷), Yu Yang(杨雨), Xuemeng Zhao(赵雪梦), Qingbang Han(韩庆邦), and Cheng Yao(姚澄) Investigation of cavitation bubble collapse in hydrophobic concave using the pseudopotential multi-relaxation-time lattice Boltzmann method 2021 Chin. Phys. B 30 044701
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