| 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 | |
| Corresponding Author | Gao, Qi(qigao@zju.edu.cn) |
| Source Publication | EXPERIMENTS IN FLUIDS
 |
| 2022 | |
| Volume | 63Issue:1Pages:12 |
| ISSN | 0723-4864 |
| Abstract | 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 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000740588300001 |
| WOS Keyword | START ESCAPE RESPONSES ; HYDRODYNAMICS ; FIELD |
| WOS Research Area | Engineering ; Mechanics |
| WOS Subject | Engineering, Mechanical ; Mechanics |
| Funding Project | National Key R & D Program of China[2020YFA040070] |
| Funding Organization | National Key R & D Program of China |
| Classification | 二类 |
| Ranking | 2 |
| Contributor | Gao, Qi |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/88282 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 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 |
| Recommended Citation 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. |
| 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 | View Download | |
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