Numerical Simulation of Stack Gas Diffusion from Thermal Power Plant

A numerical simulation method using turbulence closure techniques and Lagrangian particle dispersion model has been developed to predict atmospheric flows and stack gas diffusion under the complex terrain and non neutral stability conditions. Calculation results of flow and tracer gas diffusion were compared with those of wind tunnel experiments that were made under the same complex terrain and neutral stability conditions . Then calculation results were also compared with those of field experiments that were made under the same complex terrain and unstable stability conditions. Although some discrepancies between the results of calculations and experiments were observed, these were restricted and good agreements were obtained.