| Experimental study on wake flows of a live fish with time-resolved tomographic PIV and pressure reconstruction | |
| Tu, Han1; Wang, FuJun1; Wang HP(王洪平)2,3; Gao, Qi1; Wei, RunJie4 | |
| 通讯作者 | Gao, Qi([email protected]) |
| 发表期刊 | EXPERIMENTS IN FLUIDS
 |
| 2022 | |
| 卷号 | 63期号:1页码:12 |
| ISSN | 0723-4864 |
| 摘要 | Volumetric measurement for the wake structures generated by a freely swimming zebra fish has been conducted by tomographic particle image velocimetry. The 3D flow visualization is recorded by four high speed cameras. The time-resolved three-dimensional flow structures are obtained and studied. lambda(ci)-criterion is applied to identify vortices induced by zebra fish locomotion, which clearly exhibits the instantaneous structures of three- dimensional vortex rings. Vortex rings are linked at angles and gradually lose coherence as they convect downstream. By investigating the distribution of momentum components and acceleration terms of the Navier-Stokes equations, it is found that vortex rings in the wake have an accelerating effect on the flow. And alternating orientations of vortex rings can result in a change of thrust direction between successive tailbeats. A pressure reconstruction technique is applied, revealing low pressure regions around vortex rings and relatively large pressure gradient at the connecting part of the linked vortex rings. Combined with the kinematic information of the flow field, the dynamic analysis introduced by the acceleration and pressure fields further strengthens the understanding of fish's propulsion mechanism. |
| DOI | 10.1007/s00348-021-03378-2 |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000740588300001 |
| 关键词[WOS] | START ESCAPE RESPONSES ; HYDRODYNAMICS ; FIELD |
| WOS研究方向 | Engineering ; Mechanics |
| WOS类目 | Engineering, Mechanical ; Mechanics |
| 资助项目 | National Key R & D Program of China[2020YFA040070] |
| 项目资助者 | National Key R & D Program of China |
| 论文分区 | 二类 |
| 力学所作者排名 | 2 |
| RpAuthor | Gao, Qi |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/88282 |
| 专题 | 非线性力学国家重点实验室 |
| 作者单位 | 1.Zhejiang Univ, Sch Aeronaut & Astronaut, State Key Lab Fluid Power & Mechatron Syst, Hangzhou 310027, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 4.MicroVec Inc, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tu, Han,Wang, FuJun,Wang HP,et al. Experimental study on wake flows of a live fish with time-resolved tomographic PIV and pressure reconstruction[J]. EXPERIMENTS IN FLUIDS,2022,63,1,:12.Rp_Au:Gao, Qi |
| APA | Tu, Han,Wang, FuJun,王洪平,Gao, Qi,&Wei, RunJie.(2022).Experimental study on wake flows of a live fish with time-resolved tomographic PIV and pressure reconstruction.EXPERIMENTS IN FLUIDS,63(1),12. |
| MLA | Tu, Han,et al."Experimental study on wake flows of a live fish with time-resolved tomographic PIV and pressure reconstruction".EXPERIMENTS IN FLUIDS 63.1(2022):12. |
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| Jp2022FA576_2022_Exp（5693KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 | |
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