Abstract: According to the analyses of the layout of urban residential areas and topological space characteristics, it establishes a model for the assessment of atmospheric environment in urban residential areas. CFD software was used to numerically simulate the wind velocity distribution  from different angles. The wind environmental conditions were analyzed from the perspective of  the pedestrians. The experimental results show when the angle of the wind is 135 °, the wind environment is better, and that in architectural design, places where the wind speed changes greatly are not suitable for more human activities.

Key words: urban residential areas; layout; topological space characteristics; numerical simulation; corridor relative maximum wind speed