3D Simulation of Flow in Side Spillway with k-ε Turbulence Model and Comparing the Results with Physical Model

Spillways are structures used for releasing the surplus floodwater in necessary conditions from storage dams. Side spillway is one of the most common and complicated structures. In this research, hydraulics of the flow in the physical model of flood control structure for Vanyar dam which consists of side spillway, lavok, transition, ogee spillway and chute is three dimensionally simulated, using fluent numerical model and the results consisting of flow depth and hydrostatic pressure at 110 points were compared with experimental data. For flow analysis, k-ε model for turbulence and volume of fluid (VOF) model for multiphase flow simulation were applied. The analysis of turbulence parameters in lavok channel and boundary layer development on chute was also provided. Results show that there is a good agreement between numerical and experimental results, especially standard k-ε model for hydrostatic pressure and RNG k-ε model for water surface profile.