I was simulating a square box with trays as a porous media, where the air is flowing from the inlet passing by the porous media and then go out from the outlet. I only entered the power-law coefficients C0 C1 and the porosity. but then I realised that there is something wrong with it, because I found that in both cases with or without porous media it shows the same results. so I was wondering if someone can help me with this and show me how to simulate a porous media using the power law coefficients? I'll be so grateful for any comments or answers. Thanks.