Reply To: THERMAL CONDUCTIVITY OF TWO PHASE MATERIALS

[dlooman]

If you have enough cells and the heat load is the same on each cell then you can specify adiabatic boundary conditions on the top and bottom surface.  The adiabatic condition is obtained by not specifying any constraint on surface.  It's less clear what the boundary condition on the vertical surfaces could be.  The only alternative to adiabatic is flux normal which is obtained by coupling temperature on that surface and that doesn't correct because that would make the temperature constant over the entire surface.  If you had included a quarter of the cell to the right of the indicated domain you could apply periodic boundary conditions to the right and left surface.  A periodic boundary condition forces the temperature to be the same at the left and right boundaries and is obtained by coupling temperature across the model.  You describe the analysis as thermal conductivity, but frequently motion of the fluid is important and would require a CFD analysis.