Diffusion of passive contaminant from a line source ina neutrally stratified turbulent boundary layer

This paper presents results of modeling of the passive contaminant diffusion from a continuousrnline finite-size source located on the underlying surface of a neutral near-ground atmospheric layerrnobtained by using the non-local two-parameteric turbulence model and the transport equation of meanrnconcentration. In the proposed diffusion model the turbulent diffusion coefficient changes not only withrnthe vertical coordinate but also with the distance downstream from the source according to thernexperimental data. The results of the modeling reproduce structural features of the concentration field.