Irrigation and Water Engineering

Irrigation and Water Engineering

Numerical Simulation of the Bed Scouring Downstream the Triangular Labyrinth Weirs Using Flow-3D

Document Type : Original Article

Authors
Nazila kardan 1
mahdi komasi 2
Sara Samin Far 3
1 Department of Civil Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran
2 Assistant Professor, Department of Civil Engineering, University of Ayatollah Ozma Boroujerdi, Boroujerd, Iran
3 Department of Civil Eng. Azarbaijan Shahid Madani University, Tabriz, Iran
10.22125/iwe.2023.407266.1737
Abstract
Labyrinth weirs have always received special attention compared to linear weirs due to the increase in flow capacity through the increase in width. The number of 23 models was simulated using Flow-3D software to investigate the effect of various factors such as changing in the height of the dam body, changing the height of the weir apexes (weir height), the discharge passing over the weir, and the effects of different angles of the weir apex in the plan on the amount of bed erosion in the downstream of Labyrinth weir was studied. Validation of the numerical simulation results with the experimental model indicated a very good agreement between the numerical simulation and the experimental values. This reduction in the weir with an apex angle of 60 degrees is more than other models and the scour depth is reduced from 31 to about 90%. Also, the amount of flow traversability in this type of weir is more than other models, which made the weir with an angle of 60 degrees to be introduced as the most optimal weir in investigating the efficiency of the weir and the reduction of scouring compared to linear models, 45 and 90.
Keywords
Triangular Labyrinth weir
Scouring
Numerical simulation
Flow-3D
Subjects
 
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