In the OF code you will somewhere find this:
\Delta p = -(D \mu U + 0.5 I \rho |U|^2 )L
where
p | pressure [Pa]
\rho | density [kg/m3]
\mu | laminar viscosity [Pa s]
D | Darcy coefficient
I | inertial coefficient
L | porous media length in the flow direction
So yes, you are right, I had to adjust the coefficients. I have done that and am happy with how everything works. My workstation is still broken though, so I do not know how to compile / package the software. Everything else is ready now. I am just waiting for Chris to read my last email and start the MVRC 2017 season. I will find a solution to my big issue and supply you with the software very soon. The calender I once posted will get delayed a bit to make sure you have enough time as soon as you get everything.