NUMERICAL SIMULATION OF CONTAMINANTS TRANSPORT IN HUMAN SETTLEMENTS TAKING INTO ACCOUNT CHEMICAL REACTIONS

In this paper, we performed a numerical simulation of the spread of pollutants due to a chemical reaction near the roadway inside an urban street canyon. In the course of our study, we studied the dispersion properties of the gas when it collides with the idealized buildings that make up the urban canyon. In conclusion, a qualitative assessment was given that characterizes the nature of the distribution of the concentration of the pollutant and the process of the appearance of zones with increased turbulence, in which vortices are formed that interfere with the ventilation properties of the horizontal flow, which significantly affects the health and life of people. NO and NO 2 released into the canyon area were chosen as the considered reactive substances, and ozone O 2 , which is present in the moving air stream, was chosen as the third reactive substance. The results obtained can be used in the future for use by transport designers and road engineers, whose goal is to reduce the concentration of nitrogen oxides near the pedestrian zone of the city. All the results obtained were first tested on test problems, the results of which are in excellent agreement with the numerical and experimental values of other authors.