Thank you for the response. I already know how to set the permeabilities with those options.  I would not need to specify inertial resistance and power law since the flow is laminar. The problem is that only "mixture" can be used for the material in the porous zone, therefore, I can only specify the permeability for the "mixture".

The goal is to specify different permeabilities for different species inside the mixture. I hope the question is explained clearly.

Thank you again.