Numerical Solution of the Discharge Coefficient of Trapezoidal Arced Labyrinth Weirs with Different Middle Cycles Using Flow 3D Software

In the present study, a three-dimensional hydraulic flow simulation was carried out on Labyrinth weirs using Flow3D software and the modeling results were compared with the experimental results to Investigate the discharge coefficient of trapezoidal arced labyrinth weirs. Moreover, these models were tested under laboratory conditions in a rectangular flume with a length of 12m, a width of 0.6m, and a height of 0.6m in clear water conditions. The results indicated that the numerical solution data showed adequate conformity with the experimental model data. In general, the discharge coefficients in the results of the numerical solution were lower than the experimental model. The difference between the discharge coefficients in the numerical solution and the experimental model increased with an increase in the arc radius. As a result, with the R/w1=5 and R/w1=15 radius ratios, the discharge coefficients of the numerical solution were approximately 1.2% and 18.9% lower than the experimental model, respectively.