Simulation of large eddy of wind load on a long-span complex roof structure

A new inflow turbulence generator called discretizing and synthesizing random flow generation technique is applied to simulate the actual inflow boundary conditions of turbulent flow field. A new one-equation dynamic subgrid scale (SGS) model is adopted for the present large eddy simulations. The mean pressures and fluctuating pressures on the roof of the Shenzhen new railway station are calculated based upon the paralleled technology of Fluent 6.3 software platform under the linux system. The computational results are compared with the wind tunnel test results. It is found that the numerical simulations can predict the wind pressure distributions and overall good agreement is achieved between the computed wind pressure coefficients and the corresponding model test results. Hence, it is concluded that the DSRFG method and the new one-equation SGS model is an effective tool for predicting the wind loads of huge and irregularly shaped buildings.