Numerical simulation and analysis of the influence of podium building on outdoor wind environment in residential district.

To study the influence of buildings layout on the wind environment of residential district, this paper takes a residential district in Zhuhai as the research object. Based on the local climatic characteristics, the PHOENICS software is used to conduct CFD (computational fluid dynamics) simulation of wind environment for two kinds of buildings layout with and without podium buildings. The ventilation conditions and comfort of the two kinds of layout under the background of east, south and northnortheast wind were compared and analyzed, and the results are as follows: 1) When there is no podium building, the wind environment of the residential district under the three wind directions are improved without the obstruction of large-scale buildings, the unevenness of the wind speed is reduced, the size and number of areas with good ventilation conditions and good comfort are increased, the size and number of areas with low wind speed are reduced, and the ventilation corridors are increased. 2) Whether there are podium buildings or not, when the angle between the incoming flow direction and the passage of the building is small, the building's wind blocking and weakening effect is small, and ventilation corridors are more easily formed between buildings with better ventilation conditions. When the angle between the incoming flow direction and the passage of the building is large, the building's blocking effect is significant, the wind speed of the residential district is significantly weakened and it is prone to be uneven, so the ventilation conditions are poor. 3) The wind environment of residential district is jointly affected by buildings layout and wind direction, and the local dominant wind should be taken into account in the planning and design of residential district. [ABSTRACT FROM AUTHOR]