internal pressure assignment in sealed natural convection analysis

[bananaboat17]

I'm working on a combined (external and internal) natural convection analysis for a sealed electronics enclosure (including radiation). The autodesk help files indicated that one of the wetted internal surfaces of the sealed air volume needs a pressure assigned in order for the analysis to be fully defined. However, depending on what internal surface I choose, I get pretty big (10 degree C) temperature differences in the analysis. How can I choose which surface(s) to apply the internal pressure boundary condition on to get the most accurate results?

[Jon.Wilde]

Hi,

You should be OK to skip that in CFD 2015 🙂

Feel free to share a model if it helps.

THanks,

Jon

[bananaboat17]

We are running CFD 2014. Would it still make sense to skip the internal pressure boundary condition completely? Or would that leave that air volume not fully defined?

[Jon.Wilde · Accepted solution]

Skip it 🙂

CFD should account for it automatically.