[vanilla]

Hello

I am trying to model forced convection heat transfer through a porous medium.
I have a vertical cylinder with a constant surface temperature (because I don't know the heat flux) and I defined a porous zone with the calculated viscous and inertial resistance factors (from experimental data). The porosity of the medium was also measured.

When I compute the total heat transfer rate across the outlet at the top it gives me a large negative number. But when I turn the porous zone off I get a realistic positive heat transfer rate for forced convection. What am I doing wrong?

I am using the thermal non-equilibrium model with an estimated interfacial area density (for now) and the heat transfer coefficient from my experiment.