Modeling of Surface Evaporation of Water in Hydro Dams Using CFD (Case Study: Amirkabir Dam)

Efficient use of water resources due to the high cost of water supply resulting from population increases and the warming of the earth is necessary. The researchers of environment believe that shutting the water off behind dams will decrease water level and also causing droughts.In this study, using the CFD method, surface evaporation of Amirkabir Dam as a case study during one aqueous year was studied. For modeling, heat, and mass transfer equations, Navies-Stokes equation and VOF model are used. Data from the model were compared with experimental results. So results confirmed that the proposed model is overlap. Also, temperature profile and mass transfer rate of water level were evaluated. The results of the simulation show that surface evaporation is effective factors for reducing the height and water level behind dams