Author(s): Amir Khosrojerdi, Atefeh Mosahebi Mohammadi
Linked Author(s): Amir Khosrojerdi
Keywords: : Numerical model, shaft spillway, ANSYS CFX, cavitation, dam hydraulic
Abstract: The goals of this research are to simulate the flow field on a spillway with actual dimensions, investigate various factors affecting the efficiency of numerical method in the simulation of flow field, and the possibility of cavitation in the 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-? turbulence model simulated to achieve the appropriate pattern of flow, and also flow parameters in different discharges are evaluated. Results have shown that flow depth and velocity changes are almost constant. Considering pressure in maximum discharge, negative pressure is observed and this has caused cavitation possibility to be included in the current research
Year: 2017