Cavitation erosion often occurs on the surface of many underwater applications, which can cause severe damage to materials and reduce their performance. Since the cause of erosion is the impact pressure induced by the collapse of an individual cavitation bubble near the wall, to make a better prediction and prevent the damage potential, in this paper, we carry out systematic investigations on the impact characteristics by direct numerical simulation using a vapor bubble model. The volume of fluid (VOF) method is adopted to capture the interface between the two phases. The numerical results show that pressure wave and jet are two primary inducements of the impacts on the wall. The reason for the pressure wave impacts is the pressure wave emission after the collapse of the bubble's main part. And the reason for the jet impact is the stagnation pressure in front of the jet. After a parametric study of the two impacts with respect to the initial radius, driving pressure, and stand-off distance, the predicting equations for the pressure wave impact and jet impact are proposed at γ ≥ 1.74. When γ < 1.74, the impact pattern becomes complex due to the arrival time of the two impacts and the collapse of the vapor fragments right on the wall.
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April 2023
Research Article|
April 06 2023
Numerical investigation on the impact pressure induced by a cavitation bubble collapsing near a solid wall
Special Collection:
Cavitation
Zhao Di (赵迪)
;
Zhao Di (赵迪)
(Conceptualization, Data curation, Methodology, Validation, Visualization, Writing – original draft)
State Key Laboratory of Fluid Power and Mechatronic Systems, Department of Engineering Mechanics, Zhejiang University
, Hangzhou 310027, China
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Deng Fuqiang (邓福强)
;
Deng Fuqiang (邓福强)
(Methodology, Visualization)
State Key Laboratory of Fluid Power and Mechatronic Systems, Department of Engineering Mechanics, Zhejiang University
, Hangzhou 310027, China
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Zhang Lingxin (张凌新)
Zhang Lingxin (张凌新)
a)
(Conceptualization, Funding acquisition, Supervision, Writing – review & editing)
State Key Laboratory of Fluid Power and Mechatronic Systems, Department of Engineering Mechanics, Zhejiang University
, Hangzhou 310027, China
a)Author to whom correspondence should be addressed: zhanglingxin@zju.edu.cn
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a)Author to whom correspondence should be addressed: zhanglingxin@zju.edu.cn
Note: This paper is part of the special topic, Cavitation.
Physics of Fluids 35, 043315 (2023)
Article history
Received:
February 06 2023
Accepted:
March 18 2023
Citation
Di Zhao, Fuqiang Deng, Lingxin Zhang; Numerical investigation on the impact pressure induced by a cavitation bubble collapsing near a solid wall. Physics of Fluids 1 April 2023; 35 (4): 043315. https://doi.org/10.1063/5.0145499
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