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

Yi Yang , Zhuangning Xie , Tim K.T. Tse , Xinyang Jin , Ming Gu

Abstract

In this paper, the method of introducing additional source/sink terms in the turbulence and momentum transport equations was applied to appropriately model the effect of the tree canopy. At first, the new additional source term for the turbulence frequency w equation in the SST k-w model was proposed through theoretical analogy. Then the new source/sink term model for the SST k-w model was numerically verified. At last, the proposed source term model was adopted in the wind environment optimal design of the twin high-rise buildings of CABR (China Academy of Building Research). Based on 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 the theoretically reasonable source term model of the SST k-w model was applicable for modeling the tree canopy flow and accurate numerical results are obtained.

Key Words

wind environment; high-rise building; numerical simulation; SST k-w model; additional source/sink term; optimization design

Address

Yi Yang — State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou, China, Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
Zhuangning Xie — State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou, China
Tim K.T. Tse — Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
Xinyang Jin — Center of Wind Engineering Research, China Academy of Building Research, Beijing, China
Ming Gu — State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China

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