| Wall vortex induced by the collapse of a near-wall cavitation bubble: Influence of the water surface | |
Huang JL(黄剑霖)1,2; Wang JZ(王静竹)1,3,4; Guo WL(郭文璐)5; Wang YW(王一伟)1,2,3
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| Corresponding Author | Wang, Jingzhu([email protected]) ; Wang, Yiwei([email protected]) |
| Source Publication | PHYSICAL REVIEW FLUIDS
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| 2024-05-08 | |
| Volume | 9Issue:5Pages:25 |
| ISSN | 2469-990X |
| Abstract | 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. |
| DOI | 10.1103/PhysRevFluids.9.053602 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001231927200005 |
| WOS Keyword | DYNAMICS |
| WOS Research Area | Physics |
| WOS Subject | Physics, Fluids & Plasmas |
| Funding Project | 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] |
| Funding Organization | National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; High-level Innovation Research Institute Program of Guangdong Province |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Wang, Jingzhu ; Wang, Yiwei |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/95403 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Key Lab Mech Fluid Solid Coupling Syst, Inst Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 4.Guangdong Aerosp Res Acad, Guangzhou 511458, Peoples R China; 5.Zhejiang Univ, Sch Aeronaut & Astronaut, Hangzhou 310027, Zhejiang, Peoples R China |
| Recommended Citation GB/T 7714 | Huang JL,Wang JZ,Guo WL,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.Rp_Au:Wang, Jingzhu, Wang, Yiwei |
| APA | 黄剑霖,王静竹,郭文璐,&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 | 黄剑霖,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. |
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