Comprehensive study of the hydrodynamic effects of weirs installed in the bypass of bar rack systems to better guide downstream migrating fish
文献类型：期刊论文
| 作者 | Aleyasin, Seyed Sobhan4; Fang XJ(方兴军)3; Tachie, Mark Francis4; Katopodis, Christos2; Ghamry, Haitham1 |
| 刊名 | ECOLOGICAL ENGINEERING
 |
| 出版日期 | 2024-04-01 |
| 卷号 | 201页码:15 |
| 关键词 | Weir geometry Bar racks Turbulent kinetic energy (TKE) Turbulence eddies Particle image velocimetry (PIV) |
| ISSN号 | 0925-8574 |
| DOI | 10.1016/j.ecoleng.2024.107206 |
| 通讯作者 | Aleyasin, Seyed Sobhan(aleyasss@myumanitoba.ca) |
| 英文摘要 | 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. |
| 分类号 | 二类 |
| WOS关键词 | PARTICLE IMAGE VELOCIMETRY ; SWIMMING BEHAVIOR ; BOUNDARY-LAYER ; SILVER EELS ; FLOW ; TURBULENCE ; PASSAGE ; SMOLTS ; RIVERS |
| 资助项目 | Department of Fisheries and Oceans Canada |
| WOS研究方向 | Environmental Sciences & Ecology ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001199087900001 |
| 资助机构 | Department of Fisheries and Oceans Canada |
| 其他责任者 | Aleyasin, Seyed Sobhan |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/94941]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 作者单位 | 1.Fisheries & Oceans Canada, Winnipeg, MB, Canada 2.Katopodis Ecohydraul Ltd, Winnipeg, MB, Canada; 3.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China; 4.Univ Manitoba, Dept Mech Engn, Winnipeg, MB, Canada; |
| 推荐引用方式 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. |
| 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. |
入库方式： OAI收割
来源：力学研究所
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