CFD Numerical Simulation of Drift Diffusion of the NPP's Cooling Tower

A CFD (Computational Fluid Dynamics) software (STAR-CD) was employed to simulate the performance of the NNP's (nuclear power plant's) cooling tower with drift injection in neutral atmosphere condition. With the N-S equations were closed with k-e equations, a mathematical mode could be established for simulating the flow in cooling tower. After simulating drift diffusion and rise in a normal size and simple condition, the relation of drift diffusion and rise to air velocity was analyzed. The result was analyzed and compared with Gauss Plume model and Hanna model, which proved the feasibility of this method. Also, some insufficiency about the method and improving suggestions were given in this paper.