Numerical Analysis on the Effects of Porous Plate to Control Turbidity Currents

Reservoir sedimentation can result in loss of much needed reservoir storage capacity, and
therefore reducing the useful life of dams. The turbidity current is one of the most important factors that affects sediment distribution in reservoirs and represent a major problems of manmade reservoirs. One of the methods to control or depreciation turbidity currents in reservoirs is create solid obstacle in the reservoir. In this study, the effect of the porous plate on turbidity current with different porosity 0.3, 0.5 and 0.67 percent are studied using FLOW3D software. The turbulence models used for simulation are k ω, RNG and kε. The results showed that k ω turbulence model is more consistent than other models in thesimulation of vertical distribution of the turbidity current. The results show that the waves formed on the upstream of the porous plate are the B type. The use of plate with porosity of 0.67 percent can decrease the flow discharge of turbidity current equal to 64.5% and reduce the porosity to the 0.3 percent case the reduction of discharge of turbidity current to 30%.