CFD Analysis on Air Duct (Temperature Profile)

Adam_22208

Dear Community,

I tried to solve this question, however, I did not manage to get the desired air outlet temperature of 28⁰C. It seems like the heat does not dissipate properly through to the fluid (air). You may refer to my contour on the temperature profile as below.

The question:

Contour Plot on my attempt (outlet side):

Community-Pasted-Attachment-1698747261734.png

acupro

The energy (heat input) from the bottom of the duct is transferred to the air.  Due to the air velocity, much of that energy is convected to the outlet, and a portion is conducted from the bottom to the top.  It seems the problem is asking for the average outlet temperature to be at least 28C (301.15 K) - not that the entire outlet needs to be at least 28C.  The solver appears to behave as expected.