problems setting up heat transfer between plates - what is wrong with this?
 

Hello,

I have two parallel plates and 40 mm distance between them. Air blows at two sides(left and right) of this gap. Plates have higher temperature than the initial air temp. I utilized kw-sst model with boussinesq. I need to observe heat transfer coefficient between air and plates in the end. But strangely when postprocessing, I see heat transfer coefficient contours for a plate in one color(third attachment). what is wrong about it ?

note: second attachment shows velocity vectors for middle plane. (y+ is 3,4)