Use Engineering Database to define the porous medium. Lookp up help. tutorial.
I wish it were that simple! In the help file for Porosity it says to select the permeability type, then specify the medium's permeability. I can select Isotropic permeability but where do I enter the permeability constant? Do I need to calculate the mass or volume flow rate given a pressure drop to do this?
I think you will have to enter the pressure drop Vs flow rate.
del P = (velocity)*(dyn visc) *(thick)/(permeability) ...[http://en.wikipedia.org/wiki/Permeability_(earth_sciences)]
In my case, I always have this data so never have had to calculate it based on permeability.