Numerical Simulation of Wind Environment Around Buildings

In order to study the forming mechanism of bad wind condition around the buildings, numerical simulation is carried out to investigate the wind flow around buildings by using FLUENT code. The simulation is based on the Reynolds averaged N-S equations and the RNG k-e turbulence model. In the simulation,the computational domain was divided into tetrahedral elements with good adaptability and the finite-volume method was used for numerical discretization of the governing differential equations.The numerical results have been compared with wind tunnel test results and the errors between the numerical results and tunnel test results have been analyzed. The obtained results indicate that the wind-velocity at the enterance of the buildings is accelerated and in the back area of buildings is weakened; the total wind-velocity at pedestrian height level (2.0 m) surrounding higher building complex may be lower.