@article { author = {Malekzadeh, Faezeh and F., Salmasi and Arvanaghi, Hadi}, title = {Study of variations in discharge coefficients for broad-crested weirs with sloped upstream and downstream faces using numerical simulation}, journal = {Amirkabir Journal of Civil Engineering}, volume = {54}, number = {11}, pages = {4119-4138}, year = {2023}, publisher = {Amirkabir University of Technology}, issn = {2588-297X}, eissn = {2588-2988}, doi = {10.22060/ceej.2022.19870.7279}, abstract = {Weirs are structures that are important for measuring flow and controlling water levels. Research has shown that the discharge coefficient is not constant and depends on the crest length, the height of the weir, the upstream head, and the upstream and downstream slopes. In this study, the effect of these parameters on the discharge coefficient (Cd) is investigated by numerical simulation. The current study presents numerical simulation using the ANSYS FLUENT software. The total number of simulations is 432 which includes: 4 upstream slopes, 4 downstream slopes, 3 weir heights, 3 upstream heads (h1) and 3 weir crest lengths. It was found that the downstream face slope has little effect on Cd. For 0.1