NUMERICAL-SIMULATION TO DETERMINE THE EFFECTS OF INCIDENT WIND SHEAR AND TURBULENCE LEVEL ON THE FLOW AROUND A BUILDING

The effects of incident shear and turbulence on flow around a cubical building are being investigated by a turbulent kinetic energy/dissipat ion (kappa-epsilon) model (TEMPEST). The numerical simulations demonst rate significant effects due to the differences in the incident flow. The addition of upstream turbulence and shear results in a reduced siz e of the cavity directly behind the building. The accuracy of numerica l simulations is verified by comparing the predicted mean flow fields with the available wind-tunnel measurements of Castro and Robins (1977 ). Comparing our results with experimental data, we show that the TEMP EST model can reasonably simulate the mean flow.