[0906536m]

Hello, I am doing analysis on natural convection inside a porous square cavity, where two opposite walls are kept at constant but different temperatures and the other two are thermally insulated. I have to plot the local Nusselt number variation for the hot wall for a Rayleigh number of 10^2.
I am only given the non-dimensional governing equation in terms of temperature and the boundary conditions in terms of this non-dimensional temperature. As you cannot directly input the Rayleigh number into STAR CCM+ I firstly need to calculate the permeability and temperature difference I believe, how do I calculate these parameters?
thank-you.