Sigmaflow as a tool for studying wind comfort in urban environment

The intensive growth of modern cities leads to the construction of residential microdistricts with a dense arrangement of buildings of various heights. Such architectural solutions contribute to an unpredictable change in the aeration regime of the territory, which can lead to a deterioration in the ecological situation of the city, as well as to the formation of uncomfortable conditions in the area of human presence. To study the mechanisms of formation of these conditions and forecasting of the wind regime, a microscale model of the atmosphere of the city, implemented in the SigmaFlow program, is used. The paper presents the results of verification of a numerical model with experimental data on two test problems of flow around model elements of urban development. The obtained calculation results demonstrate a fairly good agreement with the experimental data. In addition, an analysis was made of the formation of wind conditions in a real residential area. Characteristic flow structures were obtained when flowing around buildings, and places of formation of uncomfortable and dangerous zones for human stay were identified.