I have a model of a transfer roll which has already been simulated:
I would like to add to this model a thin web of material that wraps around the face of the roll and see how that will affect the flow of air. I have experimental data regarding the speed of air that flows through the web for a given pressure difference.
What would be the best way to approach this problem? My gut feeling is to model a thin shell and define a custom porous medium for it, but ideally I would like the material to be a simple planar resistance to flow. I don't want to get a lot of cells in the thickness of this material because I really don't care what happens inside of it, I just want to know how much pressure there will be on the wide surface normal to the roll.