Experimental Study by PIV of Dispersion in the Near Wake of Idealized Car Model.

The objective of this work is to study the dispersion of pollutants in the wake of car model and thus to understand the influence of the flow on the pollutant. This experimental study is carried out in a closed circuit subsonic wind tunnel. The vehicle is assimilated to a body of Ahmed at the scale of 0.19. This work breaks down into two parts: in the first one we are interested in the characterization of the flow without taking into account the pollutant; the second part looks at the distribution of the pollutant in the wake of the flow. The velocity of the flow is measured by Particle Image Velocimetry (PIV).The statistical analysis makes it possible to apprehend the physical phenomena taking place in the wake of idealized car model. Index Terms - Ahmed model, Separated turbulent flow, Dispersion, Particle Image Velocimetry.