Wall vortex induced by the collapse of a near-wall cavitation bubble: Influence of the water surface
文献类型：期刊论文
| 作者 | Huang, Jianlin4,5; Wang, Jingzhu2,3,5; Guo, Wenlu1 ; Wang, Yiwei3,4,5; Wang YW(王一伟)
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| 刊名 | PHYSICAL REVIEW FLUIDS
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| 出版日期 | 2024-05-08 |
| 卷号 | 9期号:5页码:25 |
| ISSN号 | 2469-990X |
| DOI | 10.1103/PhysRevFluids.9.053602 |
| 通讯作者 | Wang, Jingzhu(wangjingzhu@imech.ac.cn) ; Wang, Yiwei(wangyw@imech.ac.cn) |
| 英文摘要 | Wall vortex occurs when a cavitation bubble oscillates far from a single rigid wall (at a dimensionless standoff distance of gamma(r) > 1 . 3). This study reveals that introducing a water surface expands the wall vortex regime. A wall vortex in an expanded new regime forms instead of a free vortex at a smaller gamma(r) value. Because of the influence of the water surface, a broader jet pierces the bottom of a bubble. This causes the bubbles to expand easily along the wall and form a flat shape during the second cycle. Here an outwards flow forms instead of an upward flow after the bubble recollapses. This study investigates the formation and development of a wall vortex in the new expanded regime via a combination of experiments, numerical simulations, and theoretical modeling. To this end, a theoretical model describing the radial motion R and centroid position h of the bubble between the boundaries is developed using Lagrangian formulation. Two infinite sets of image bubbles are used to satisfy the conditions of the water surface and rigid wall based on image theory. The criteria for the vortex flow patterns are proposed based on the direction of the centroid migration h(t(c)) of the bubble at the beginning of the second cycle t(c). A free vortex occurs when the upward flow dominates [h(t(c)) > 0], whereas a downwards flow dominates the wall vortex [h(t(c)) < 0]. A phase diagram of the vortex flows is obtained from the theoretical model and is verified using the experimental results. Numerical analysis reveals that the wall vortex flow with the influence of the water surface contributes to a greater wall shear stress and larger area, thereby increasing the potential for surface cleaning. These findings provide new insights for engineering applications such as ultrasonic cleaning. |
| WOS关键词 | DYNAMICS |
| 资助项目 | National Natural Science Foundation of China[12122214] ; National Natural Science Foundation of China[12272382] ; National Natural Science Foundation of China[12293000] ; National Natural Science Foundation of China[12293003] ; National Natural Science Foundation of China[12293004] ; Youth Innovation Promotion Association CAS[2022019] ; High-level Innovation Research Institute Program of Guangdong Province[2020B0909010003] ; High-level Innovation Research Institute Program of Guangdong Province[GARA2022002000] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001231927200005 |
| 资助机构 | National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; High-level Innovation Research Institute Program of Guangdong Province |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/95402]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 通讯作者 | Wang, Jingzhu; Wang, Yiwei |
| 作者单位 | 1.Zhejiang Univ, Sch Aeronaut & Astronaut, Hangzhou 310027, Zhejiang, Peoples R China 2.Guangdong Aerosp Res Acad, Guangzhou 511458, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 4.Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Key Lab Mech Fluid Solid Coupling Syst, Inst Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Jianlin,Wang, Jingzhu,Guo, Wenlu,et al. Wall vortex induced by the collapse of a near-wall cavitation bubble: Influence of the water surface[J]. PHYSICAL REVIEW FLUIDS,2024,9(5):25. |
| APA | Huang, Jianlin,Wang, Jingzhu,Guo, Wenlu,Wang, Yiwei,&王一伟.(2024).Wall vortex induced by the collapse of a near-wall cavitation bubble: Influence of the water surface.PHYSICAL REVIEW FLUIDS,9(5),25. |
| MLA | Huang, Jianlin,et al."Wall vortex induced by the collapse of a near-wall cavitation bubble: Influence of the water surface".PHYSICAL REVIEW FLUIDS 9.5(2024):25. |
入库方式： OAI收割
来源：力学研究所
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