Modelling of concetration of a pollutant
 

Hie,

I have tried to model the concetration of a pollutant but have not succeeded. What I did was to get the velocity field of the steady flow. Then I "turned off" the solvers of flow equation and turbulence and then "turned on" the scalar equation of my scalar in unsteady state. The results I am getting is a constant concetration of pollutant with any step time and is not what I expected.

I need your help guys.

Chims