Influence of Tall Buildings on the Distribution of Particulate Matter and Air Pollution in the Environment around Them

The impact of high-rise urban buildings on environmental conditions, including wind movement in urban valleys, is an issue that needs attention. Because wind is one of the important variables affecting the conditions of pedestrian thermal comfort as well as the scattering of urban outdoor pollution. The purpose of this study was to find the positive effects of such buildings on reducing environmental pollution.

In this study, texture around Imam Khomeini Square in Tehran was examined using Envi-met software. The tallest building in this context is a telecommunication building with 50 meters high. Therefore, in addition to the actual height of the building and examining the wind speed pattern at different altitudes of 50 meters, assuming the building has different heights (15, 20, 25, 30, 35, 40, 45 meters), was also simulated and the results of the wind flow distribution pattern of the different models was compared with each other.

By examining the relationship between elevation and geometry of this building with the pattern of current distribution and wind speed around it, it was found that by changing the height, the patterns of air turbulence around the building change and this changes the pattern of air pollution.

This study shows the significant effect of building height on the wind pattern around the texture and the higher air layers and the air pollution distribution of the adjacent passages.