Simulation of Traffic-Born Pollutant Dispersion and Personal Exposure Using High-Resolution Computational Fluid Dynamics

Road vehicles are a large contributor to nitrogen oxides (NOx) pollution. The routine roadside monitoring stations, however, may underrepresent the severity of personal exposure in urban areas because long-term average readings cannot capture effects momentary, high peaks air While numerical modelling tools historically have been used propose an improved distribution ultra-high resolution Computational Fluid Dynamics models can further assist relevant stakeholders understanding important details pollutant dispersion and at local level. This study deploys 10-cm-resolution CFD model evaluate actual NOx from traffic by tracking gases emitted tailpipe moving being dispersed towards roadside. investigation shows that set four Euro 5-rated diesel travelling constant speed generate momentary concentrations as 1.25 mg/m3, with 25% expected increase for doubling number approximately 50% reduction when considering 6-rated vehicles. paper demonstrates how tool be identify impact measures reduce exposure, such protective furniture, patterns environmental conditions change.