[Sanyo]

Dear All,

At the outset, Wish you all a Very Happy & Prosperous New Year!

I am trying to model a heat exchanger with porous media assumption. It is an HE in the furnace (superheater). I am modeling the flue gas side only. Hence effects of steam have to be approximated. I know the temperature drop in flue gas after passing through the superheater. I am giving the sink value for thermal extraction accordingly. However I am facing two problems due to nonuniformity of the flow.

1. Flue gas temperature is much higher than the expected value.
2. In some cells, where the flow is negligible, temperature of subdomain goes upto "-14" Deg C, which is definitely unrealistic.

Is there any way to limit the minimum temp. value inside the subdomain?

Can I define my sink term to get the exact temperature drop in flue gases? If yes how?

I would appreciate your help.

Thanks in advance,

Regards,

--Sanyo