Comparison of numerical and laboratory modeling in the estimation of the labyrinth weirs discharge coefficient:Investigating different overflow location modes

Labyrinth weirs are considered from important hydraulic structures to regulate the water level and control flow in canals, rivers and dam reservoirs. In this research a comparison of numerical modeling with softwareFLOW-3Dwith laboratory results in the case oflabyrinth weirs has been carried out. To review and evaluate different scenarios of overflow location like changing the geometric arrangement and labyrinth weirshas been considered In terms of form and direct or reverse direction weirs discharge coefficient. Therefore, selected a labyrinth weirs model with three side angles 15 and 22.5 and 30 degrees have been selected. To calibrate the selected models according to laboratory conditions5 discharge in the range of 2.8 to 18.1 liters per second were chosen to pass them. Numerical model after calibration Simulated with laboratory results different scenarios of overflow application. Results show outputs of numerical model with experimental results good coordination. In the same vein amount of discharge coefficient in weirs form-1 and the inverse form increase of discharge coefficient with increasing the side of the weirs has been found.