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Experimental investigation of a vortex ring in a polymer solution

文献类型：期刊论文

作者Liu GW(刘广伟)1,2; Xu D(徐多)1,2
刊名EXPERIMENTS IN FLUIDS
出版日期2025-07-04
卷号66期号:7页码:16
ISSN号0723-4864
DOI10.1007/s00348-025-04069-y
通讯作者Xu, Duo(duo.xu@imech.ac.cn)
英文摘要In this study, we experimentally investigated the kinematic characteristics of solitary vortex rings in polymer solutions. Two distinct experimental configurations are examined: (1) free downstream translation of the vortex ring and (2) vortex ring impingement onto a wall. Under the flow parameters in this study, the vortex ring maintains a laminar state throughout its evolution. Two-dimensional particle image velocimetry measurements of flow velocity fields were performed in the meridional plane of the vortex ring. Compared with its Newtonian fluid counterpart, the polymer solution vortex core exhibits a marked asymmetry in its vorticity distribution, with this disparity becoming more distinct at increased polymer concentrations. Nevertheless, normalized vorticity profiles demonstrate semi-self-similarity across different polymer concentrations. During its free downstream translation, both the translation speed and circulation of the vortex ring exhibit distinct power-law decay characteristics over time. These decay trends can be empirically described by separate scaling relationships. In wall impingement experiments, the azimuthal stretching of a vortex ring in a polymer solution is suppressed compared with its Newtonian counterpart when the inertial effect dominates. After colliding with the wall, a vortex ring in a polymer solution is less prone to develop secondary vortices compared to its Newtonian counterpart.
分类号二类
WOS关键词HEAD-ON COLLISION ; FLOW ; EVOLUTION ; CYLINDER ; DYNAMICS ; DECAY
资助项目Chinese Academy of Sciences, China[12588201] ; Chinese Academy of Sciences, China[12372224] ; Chinese Academy of Sciences, China[11988102] ; National Natural Science Foundation of China[YSBR-087] ; Chinese Academy of Sciences (Project for Young Scientists in Basic Research)[XDB0620102] ; Strategic Priority Research Program
WOS研究方向Engineering ; Mechanics
语种英语
WOS记录号WOS:001522732700001
资助机构Chinese Academy of Sciences, China ; National Natural Science Foundation of China ; Chinese Academy of Sciences (Project for Young Scientists in Basic Research) ; Strategic Priority Research Program
其他责任者徐多
源URL[http://dspace.imech.ac.cn/handle/311007/102274]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing, Peoples R China;
推荐引用方式
GB/T 7714		 Liu GW,Xu D. Experimental investigation of a vortex ring in a polymer solution[J]. EXPERIMENTS IN FLUIDS,2025,66(7):16.
APA 刘广伟,&徐多.(2025).Experimental investigation of a vortex ring in a polymer solution.EXPERIMENTS IN FLUIDS,66(7),16.
MLA 刘广伟,et al."Experimental investigation of a vortex ring in a polymer solution".EXPERIMENTS IN FLUIDS 66.7(2025):16.

入库方式： OAI收割

来源：力学研究所

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