CFD simulation of flow and dispersion fields around isolated building: Comparison of SRANS and URANS computations with wind tunnel experiment

摘要

This study investigated the effects of the periodic fluctuation ofrnwind velocity using unsteady RANS model around thernrectangular building by comparing with the wind tunnelrnexperiment. The fluctuation appeared successfully in unsteadyrncomputation using k-ω SST model, however the shortenrnreattachment length failed to give a closer concentration resultrnapproach to experiment unexpectedly. Further investigation of therndetailed turbulent structure and dispersion process in the weakrnregion by comparing LES analyses.