Numerical Simulation of Roll Waves in Chutes

Chutes are one type of the many hydraulic structures that cause in the formation of the waves and turbulence in the free surface of flow through super critical flow. In this study by the fluent software and by using volume of fluid model and PISO algorithm, the formation of the rolling waves in the physical model of azad damweirand numerical models have been considered. For this purpose, flow depth and weave heightare calculated along the chutes length for different discharges, widths and longitudinal slopes of the chute.The results indicate that roughness of the bed and walls impede the formation of the rolling wave, also the rolling waves are expected to be generated for sections of the chute whenweave height tohydraulic depth ratio in that section is above 0.57.