To create shadows and enhance ventilation, piloti is commonly used in subtropical climate areas, and the influence of piloti on outdoor environment need to be revealed. Taking the city of Guangzhou China, as an example, by adopting coupled simulation method, this work researched on the influence of piloti on wind environment in residential blocks. Firstly, a series of building cases with piloti in the center of each building was simulated, and the piloti of each case is 0%, 40%, 60%, 80% and 100%. Secondly, another 3 cases with 50 percent piloti ratio were simulated, and the piloti arrangement method is crossed, vertical and horizontal for each case. The results showed that, when piloti is in the center of each building, both of velocity under piloti and out of piloti area showed positive correlation with piloti ratio, and the inflection point is 60 percent and 80 percent independently. The result of another 3 cases was plotted on the figure of piloti centralized cases, and for the velocity out of piloti area, the value of these 3 cases is very close to each other and much lower than the centralized case. For the velocity under piloti area, the vertical piloti arrangement case fits the trend of centralized cases well, and the horizontal and cross piloti arrangement case is much lower than that of centralized cases.
Study on the Influence of Piloti Ratio on Residential Block’s Wind Environment by Coupled Simulation Method