Validation of the volume of fluid method for free surface flow over a stepped spillway14 December 2010
Stepped spillways are one of the main energy dissipaters in hydraulic structures. In this research work, numerical modelling of water flow over a stepped spillway in parallel physical modelling is presented. The computational fluid dynamics code Fluent was used to predict the main features of flow. This included the determination of water surface, the development of swirling flow, and resulting pressures over the steps. For all the cases considered, the predicted water surface profiles and pressures over the length of spillway were in close agreement with the experimental measurements. This study indicates the capability of a numerical model using the VOF technique to predict the flow variables over the complex stepped spillway.