Study of wall wettability effects on cavitation bubble collapse using lattice Boltzmann method
Source abstract
Abstract
This study investigates the effects of wall wettability on cavitation bubble collapse using the pseudopotential lattice Boltzmann method with an appropriate external force term and wall contact angle boundary condition. The accuracy of the proposed numerical approach is verified by simulating a single-bubble collapse near a neutral wall. The result shows that the wettability condition of the wall has a significant effect on the forces exerted on cavitation bubbles. For a hydrophilic surface, there is a repulsive force between the surface and the bubble, whereas for a hydrophobic surface, the force is attractive. The wall wettability affects the evolution of the bubble shape, the maximum collapse pressure, the microjet velocity, and the total kinetic energy of the cavitation bubble during its collapse. Changing the wettability from hydrophobic to hydrophilic decreases the maximum pressure and microjet velocity but increases the cavitation bubble lifetime. Furthermore, the range of wall effects is smaller for a hydrophilic wall than for a hydrophobic wall.
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Research context
OpenAlex topics: Lattice Boltzmann Simulation Studies · Aerosol Filtration and Electrostatic Precipitation · Fluid Dynamics and Heat Transfer
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Chongqing Southwest Research Institute for Water Transport Engineering, Chongqing Jiaotong University 1 , Chongqing 400074, China
State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University 2 , Chengdu 610065, China
School of Shipping and Naval Architecture, Chongqing Jiaotong University 4 , Chongqing 400074, China
China Waterborne Transport Research Institute 3 , Beijing 100088, China
School of Navigation, Wuhan University of Technology 5 , Wuhan 430063, China
Tianjin Research Institute for Water Transport Engineering, Key Laboratory of Engineering Sediment, Ministry of Transport 6 , Tianjin 300456, China
Funding
National Natural Science Foundation of China · China National Key R&D Plan · Science and Technology Project of Zhejiang Transportation Department
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