Energy dissipation comparison of flow on stepped spillway and chutes with Numerical simulation.

Stepped spillway as a hydraulic structures for high power distribution and as well as the structure used by the application environment beautification. In recent decades, low cost and high speed of construction of stepped spillway and particularly understanding new technologies dam construction using roller concrete materials ,and The best way to cope of these spillways with this type of concrete, the development cope of these is more.In this study the modeling of stepped spillway of Siahbishe bala dam , with Numerical model of Fluent, and the RSM turbulence model . and Mixture of methods used to determine the free surface and finally the experimental results were compared with the institution of Tehran water . with Calculating the amount of energy dissipation from Numerical results, and comparing with the values obtained laboratory methods the difference between the values obtained satisfactory and Fluent as numerical tools for computing as needed to be introduced in stepped spillways. In calculating the energy dissipation in stepped spillway chute and simple chute, which energy dissipation in stepped was almost double the mode is simple. The results also show that the rate of increase in flow over the spillway energy loss is reduced.

Keywords:

stepped spillway , Energy dissipation , chute , Numerical method