Comprehensive study of the hydrodynamic effects of weirs installed in the bypass of bar rack systems to better guide downstream migrating fish

doi:10.1016/j.ecoleng.2024.107206

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Comprehensive study of the hydrodynamic effects of weirs installed in the bypass of bar rack systems to better guide downstream migrating fish
	Aleyasin, Seyed Sobhan 4; Fang, Xingjun 3; Tachie, Mark Francis 4; Katopodis, Christos 2; Ghamry, Haitham 1
刊名	ECOLOGICAL ENGINEERING
	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.
资助项目	Department of Fisheries and Oceans Canada
WOS关键词	PARTICLE IMAGE VELOCIMETRY ; SWIMMING BEHAVIOR ; BOUNDARY-LAYER ; SILVER EELS ; FLOW ; TURBULENCE ; PASSAGE ; SMOLTS ; RIVERS
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
内容类型	期刊论文
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-)
通讯作者	Aleyasin, Seyed Sobhan
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, Xingjun,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,Fang, Xingjun,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.