Hey guys, I have a heat transfer model that is a bit of an odd-ball here.

So I have an enclosure with some hot components within and I will have the following:

- very low pressure air so very little convective heat transfer

- unpredictable air flow, so I will have to assume stagnation

- virtually constant air exchange which would dictate a constant and low steady state air temperature.

My hot component, I need to determine the "touch temperature" at the exterior of the insulation with an estimated heat loss @ 125W.

So currently if I input zero air-flow, the model goes until it reaches a steady-state air temperature through the entire computationl domain.

But if I input an air-flow to mimic the exchange, I end up with hot and cold spots on the surface of my hot component.

I need this model for a worse case scenario heat loss / touch temp model.

Any ideas?

This may not be the CORRECT answer per se, but it's correct for me.

I found that if I turn on gravity in the modeling then I have a bit of free convection which is the worst case scenario for my configuration while still maintaining a constant air change without forced convection.