Verification of a tree canopy model and an example of its application in wind environment optimization

Abstract. In this paper, the method of introducing additional source/sink terms in the turbulence andmomentum transport equations was applied to appropriately model the effect of the tree canopy. At first,the new additional source term for the turbulence frequency ω equation in the SST k-ω model wasproposed through theoretical analogy. Then the new source/sink term model for the SST k-ω model wasnumerically verified. At last, the proposed source term model was adopted in the wind environmentoptimal design of the twin high-rise buildings of CABR (China Academy of Building Research). Basedon the numerical simulations, the technical measure to ameliorate the wind environment was proposed.Using the new inflow boundary conditions developed in the previous studies, it was concluded that thetheoretically reasonable source term model of the SST k-ω model was applicable for modeling the treecanopy flow and accurate numerical results are obtained.Keywords: wind environment; high-rise building; numerical simulation; SST k-