Computational Model for Transient Pollutants Dispersion in City Intersection and Comparison with Measurements

Many city intersections are often heavily polluted due to intensive traffic. Dispersion of pollutants originating from traffic is directly connected with the geometry of the urban area and traffic conditions. The urban area is mostly heavily built-up area and buildings and other obstacles that may significantly influence local concentrations. Moving vehicles enhance both micro- and large-scale mixing processes in their surroundings. Not taking into account traffic will lead to neglecting one of the most important phenomena that influences mixing processes in the proximity of traffic paths. The influence of traffic is increasingly important in situations of very low wind speed.