Define convection coefficient in contact region
I have a giant block of steel cooled by air in a room.
Usually I could just set a convection boundary condition with a certain convection coefficient hf until the block would asymptotically reach the air temperature, but this would mean that the air would always be at a certain constant temperature while cooling the object.
In my case, the block of steel thermal inertia is comparable with the air, so the air will start heating up while the block cools down, until the two will reach an equilibrium temperature.
Because of this, I wanted to model the air around the block as a solid element in order to have a mass and specific heat, and define the convection boundary condition as the contact region type.
How can I do this? Can I give a certain coefficient, say 10W/m2/K, or a coefficient that is a function of temperature?