Impact of vegetation pattern and wind speed on thermal environment in building group

Vegetation pattern and wind speed have a significant impact on outdoor thermal environment. This paper takes the air temperature of pedestrian areas in building group as the analytical variable. The simulation software of ENVI-met is employed to analyze air temperature variations under different vegetation patterns, tree heights and wind speeds in Shanghai Firstly, a lot of cases are established to analyze the impact of vegetation patterns on outdoor thermal environment. Secondly, different tree heights are talked about to analyze the impact on outdoor thermal environment. Finally, the impact of wind speed is added on the basis of previous cases. The simulation results show: The tree pattern has the best cooling effect in three vegetation patterns, which can reduce the temperature by about 1 degrees C; Within a certain height range, the taller the tree is, the more obviously the thermal environment temperature reduces; Higher wind speed is beneficial to reduce the ambient temperature of pedestrian areas, but it will lead to intensified uneven temperature distribution and make pedestrians feel uncomfortable. The simulation results can provide references for the preliminary planning and design of building group.