Shadow Wall / Help Sought
 

Hi,

I have two adjacent zones one is solid (coal) and another one is fluid (Occupaid by Oxygen).
A reaction is taking place at the solid surface/interface i.e. coal is getting combusted with oxygen (which is coming from the fluid zone).
It is a exothermic reaction. because of this reaction, heat transfer 'll takes place in both the zines.
I need to obtain the temperature profile in side the two zones.
I need to create a geometry in a way that only heat should get transfer through the interface between the two zones.
How can i create the shadow wall for on side interface? or can any body suggest me how can i solve this problem in FLUENT?

Thanks in Advance