Hi, I have a question regarding setting up the porous media model. I am using OpenLB version 1.4.
Section 6.3 of the documentation mentions that the permeability parameter K is calculated as K = U * A * mu * L / dP, where U is characteristic velocity, A is cross-sectional area, mu is dynamic viscosity, L is characteristic length and dP is pressure drop. I wanted to know, is cross-sectional area, pressure drop, and characteristic length supposed to be for the entire porous media domain, or for an individual cell?
Would appreciate any clarification on this point.