A new technique for the numerical simulation of wind flow around buildings

摘要

A two-layer method combining the k- model in fully turbulent regions with a one-equation model in near wall area has been tested in computing the wind conditions around a cubic building. Results were compared with those from k- model computation as well as from experiments. In contrast with the usual k- model approach, this method has been effective in predicting the flow separation above the roof surface and near the side walls of a cubic building. The numerical prediction of the wind-induced pressure on building surfaces, especially on roof and side walls, has also been improved as compared with the k- model method.