Radon concentration in a room using cfd
 

Hi
I would like to simulate the concentration of Radon, a radio active gas, using Open Foam CFD. I have downloaded the windows version 1.5. The study room is a rectangular one with ventilation. The plan is to find the radon gas concentration at three heights. The building material is the source of radon flux. It can be experimentally calculated . They contain Radium which alpha decays to Radon and it emanates from the walls. What are the parameters required for the simulation?