| Comprehensive study of the hydrodynamic effects of weirs installed in the bypass of bar rack systems to better guide downstream migrating fish | |
| Aleyasin, Seyed Sobhan1; Fang XJ(方兴军)2; Tachie, Mark Francis1; Katopodis, Christos3; Ghamry, Haitham4 | |
| Corresponding Author | Aleyasin, Seyed Sobhan([email protected]) |
| Source Publication | ECOLOGICAL ENGINEERING
 |
| 2024-04-01 | |
| Volume | 201Pages:15 |
| ISSN | 0925-8574 |
| Abstract | Turbulent flows are investigated in the bypass of a bar rack system to understand the effects of weirs placed at the bypass entrance on hydraulic conditions used to guide fish moving downstream. Three test cases were studied: (a) no weir (reference case), (b) arc-shaped weir and (c) triangular weir. A stereo particle image velocimetry system was employed to acquire the three velocity components in the mid-plane of the bypass and examine various statistics including mean velocities, Reynolds stresses, turbulent kinetic energy as well as turbulence eddies and swirling strength. The weirs deflect the flow away from the channel bed due to the blockage effect and increase the bypass velocity significantly, though remains under the suggested critical value of 1 m s(-1) when the approach velocity was 0.38 m s(-1). In the wake region of the triangular weir, a distinct recirculation bubble forms which may negatively affect fish migration. There is an increase in the level of Reynolds stresses and turbulent kinetic energy in the upstream vicinity of the weirs and the shear layers issuing from their tips. It is shown that the topology of the turbulence eddies is greatly modified by the weirs which can more readily assist fish guidance toward the bypass. Also, the swirling strength of the turbulence eddies behind the triangular weir is more pronounced compared to the arc-shaped weir. For the reference case, the swirling strength of the eddies is the weakest. |
| Keyword | Weir geometry Bar racks Turbulent kinetic energy (TKE) Turbulence eddies Particle image velocimetry (PIV) |
| DOI | 10.1016/j.ecoleng.2024.107206 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001199087900001 |
| WOS Keyword | PARTICLE IMAGE VELOCIMETRY ; SWIMMING BEHAVIOR ; BOUNDARY-LAYER ; SILVER EELS ; FLOW ; TURBULENCE ; PASSAGE ; SMOLTS ; RIVERS |
| WOS Research Area | Environmental Sciences & Ecology ; Engineering |
| WOS Subject | Ecology ; Engineering, Environmental ; Environmental Sciences |
| Funding Project | Department of Fisheries and Oceans Canada |
| Funding Organization | Department of Fisheries and Oceans Canada |
| Classification | 二类 |
| Ranking | 3 |
| Contributor | Aleyasin, Seyed Sobhan |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/94942 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Univ Manitoba, Dept Mech Engn, Winnipeg, MB, Canada; 2.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China; 3.Katopodis Ecohydraul Ltd, Winnipeg, MB, Canada; 4.Fisheries & Oceans Canada, Winnipeg, MB, Canada |
| Recommended Citation GB/T 7714 | Aleyasin, Seyed Sobhan,Fang XJ,Tachie, Mark Francis,et al. Comprehensive study of the hydrodynamic effects of weirs installed in the bypass of bar rack systems to better guide downstream migrating fish[J]. ECOLOGICAL ENGINEERING,2024,201:15.Rp_Au:Aleyasin, Seyed Sobhan |
| APA | Aleyasin, Seyed Sobhan,方兴军,Tachie, Mark Francis,Katopodis, Christos,&Ghamry, Haitham.(2024).Comprehensive study of the hydrodynamic effects of weirs installed in the bypass of bar rack systems to better guide downstream migrating fish.ECOLOGICAL ENGINEERING,201,15. |
| MLA | Aleyasin, Seyed Sobhan,et al."Comprehensive study of the hydrodynamic effects of weirs installed in the bypass of bar rack systems to better guide downstream migrating fish".ECOLOGICAL ENGINEERING 201(2024):15. |
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