تحليل عددي پارامترهاي هيدروليكي جريان روي سرريزهاي نيلوفري با در نظر گرفتن مدل توربولانس

Nemerical analysis of hydraulic parameters on moorning spillways with consideration turbulent model

Of the goals of this research is to simulating the flow field on a spillway with actual dimensions, investigate various affecting factors, the efficiency of numerical method in the simulation of flow field, and the possibility of cavitation in evacuation system of Alborz Reservoir Dam. In this regard, flow hydraulic in the spillway is investigated using ANSYS CFX software, in which governing equations of fluid flow including equations of continuity and Navier-Stokes motion, are simulated by finite volume and implicit discretization at each time step. For this purpose, the free-surface two-phase flow by using k-ε turbulence model simulated to achieve the appropriate pattern of flow, and also flow parameters in different discharges are evaluated. Results has shown that flow depth and velocity changes is almost constant. Considering pressure in maximum discharge, negative pressure is observed, this caused cavitation possibility to be studied in the current research.

Of the goals of this research is to simulating the flow field on a spillway with actual dimensions, investigate various affecting factors, the efficiency of numerical method in the simulation of flow field, and the possibility of cavitation in evacuation system of Alborz Reservoir Dam. In this regard, flow hydraulic in the spillway is investigated using ANSYS CFX software, in which governing equations of fluid flow including equations of continuity and Navier-Stokes motion, are simulated by finite volume and implicit discretization at each time step. For this purpose, the free-surface two-phase flow by using k-ε turbulence model simulated to achieve the appropriate pattern of flow, and also flow parameters in different discharges are evaluated. Results has shown that flow depth and velocity changes is almost constant. Considering pressure in maximum discharge, negative pressure is observed, this caused cavitation possibility to be studied in the current research.