Numerical analysis of spillway flow: Mersin Dereyurt Dam splillway sample

Inthisstudy, the flow parameters over a spillway are calculated numerically and analytically In the numerical modelling, the governing equations of flow over the spillway are solved numerically by ANSYS-Fluent based on finite difference method using Standart k-ε, Modified k-, Shear Stress Transport and Reynold Stress turbulence models. The volume of fluid (VOF) method is used to determine the free surface profile. The numerical results for the flow profile are compared with the standart step method and all the turbulent closure models used in the present study are found to be successful in determining free surface profile over the spillway and chute channel. However, Reynolds Stress Model is slightly more successful than the other turbulence models according to the qualitative comparison using the mean square error index. In addition, the numerical distributions of velocity, pressure and turbulence intensity on the approach channel, spillway and chute channel are investigated and the flow characteristics over the spillway was numerically analyzed.