Abstract

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Title:: Numerical Simulation of Effect of Blockage Ratio on Facade Pressure Coefficient

Author(s):: FANG Ping-zhi; GU Ming; TAN Jian-guo; LUAN Gui-han; Shanghai Typhoon Institute of China Meteorological Administration

Keywords:: TTU model; facade pressure coefficient; wall function; blockage ratio; numerical simulation; k-εturbulent model

Abstract:: Numerical wind field based on the standard k-ε turbulent model was established. The inlet flow boundary conditions were same as the physically simulated wind field of exposure category B with the scale of 1∶50 in TJ-2 wind tunnel of Tongji University. As an application of the numerical wind field, steady state flow around the TTU model was investigated and the numerical results were compared with those from the real site and the wind tunnel. Effects of blockage ratios on the facade pressure coefficients were mainly discussed. The results show that absolute values of the pressure coefficients from the roof and leeward side of the TTU model have the increasing tendency with increasing of blockage ratio. For the upwind side of the TTU model, the pressure coefficients have the decreasing tendency with increasing of the blockage ratio caused by the lateral boundary, and have the increasing tendency with increasing of the blockage ratio caused by the top boundary of the computational domain.