NUMERICAL STUDY OF CARBON MONOXIDE DISPERSION IN AN URBAN MICRO REGION

Resumo

This paper presents the numerical study of the dispersion of carbon monoxide (CO) in an
urban micro region, located in the city of Ponta Grossa/PR, Brazil. Three main roads are considered
polluting sources: Vicente Machado Avenue, Ermelino de Leão Street, and Benjamin Constant Street.
The mass flow of CO emission in the simulated routes was calculated based on emission factors and
the counting of the vehicles (cars, buses, trucks, and motorcycles) in the place. The simulations were
performed using ANSYS/FluentTM 19.1 software. With the results it was possible to obtain
visualizations of the fluid dynamics conditions in the place, behavior of the pollutants and possible
regions of accumulation due to the recirculation. The pollutant concentration results presented values
of 14.4 ppm, at the monitoring point considering a height of 1.5 m in relation to the soil level. The
values obtained in the simulations presented concentrations higher than the 9 ppm limit established by
the guidelines of the World Health Organization (WHO).