Air pollution dispersion simulation by LESchem

Nowadays, heavy vehicle emission is main pollutant source in urbanized areas, air pollutants emitted from vehicles in street canyons may be reactive, undergoing mixing and chemical processing before escaping into the overlying atmosphere, both dynamics and chemistry contribute to deterioration of air quality. In this project, by using large-eddy-simulation(LES) in the open-source CFD code OpenFOAM, street canyon models will be built, and we will extend our chemical scheme in LES from NOx-O3 chemistry to NOx-O3-VOCs chemistry, the coupling effect between dynamics and different chemical schemes will be examined, finally more accurate reactive pollutants’ distribution results are expected to obtain, which may offer guidance to building design and benefit city’s ventilation.