Conjugate heat transfer
 

Dear experts,

I modeled a conjugate heat transfer but I'm not certain about the results. Your opinion and suggestions really matter.

I have an 18mm dia cylinder(solid at 293[K]) inside a cube (fluid at 293[K]). I have a pressure inlet (CO2 gas) with a high temperature (1273[K]) and Pressure 2[bar].

1. I've used the k-omega SST turbulence model for fluid flow.

2. I've used the 'coupled' condition at the interface created by the fluent. Since I used the 'coupled' option, I gave the heat flux as 'zero' at the cylinder wall. I've patched all the domains with the temperature '293.15[K]' during initialization.

I stopped the simulation in-between.

Reason: I've seen the rise in the volume average temperature of the solid cylinder by 1 degC for 0.17 sec. Is this is possible? Please comment with your experiences.