Author(s): Seyed Sobhan Aleyasin; Xingjun Fang; Mark Francis Tachie; Christos Katopodis; Haitham Ghamry
Linked Author(s): Christos Katopodis
Keywords: No Keywords
Abstract: The flow field in the bypass of a bar rack system was studied using particle image velocimetry systems 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: no weir, triangular weir and arc-shaped weir. Mean velocities, Reynolds stresses and turbulent kinetic energy (TKE) are examined. The weirs deflect the flow away from the channel bed and increase the bypass velocity significantly, though remains under the suggested critical value of 1 m/s. There is an increase in the level of Reynolds stresses and TKE in the vicinity of the weirs and the shear layers issuing from the weir tips, though TKE remains in the most suitable range for fish.
Year: 2024