Rob
Ansys Employee

 

If the temperature field is constant then generally you’re adding heat into the wrong place, the cell zones aren’t connected or the boundary conditions mean that the heat escapes very quickly. 

Surface reports are for planes or “surface” entities, eg walls, inlet, outlet etc.  The volume condition is reported for the fluid & solid zones.  In 2d the two should return the same values for the fluid & solid regions. 

Please post some images of the results so I can see what's going on.