I am modeling a circuit for oil cooled brakes to evaluate the flow throughout the system. I don't have the detail for the brakes themselves but I do have some test data for flow and dP. I would like to represent the restriction of the brakes using the Porous Surface model on an interface. How can I determine the Thickness, Permeability and the Quadratic Coefficient? I have a representation of the brakes in the model with a certain length which I think I can use as the thickness. I need to determine Permeability and Quadratic Coefficient based on my test data. Does anyone have a suggestion? I was given a spreadsheet to find the Linear and Quadratic Drag Coefficients for a resistance model that was applied to a domain. I would like something similar to that for the porous surface.