I am trying to see what temperature a semiconductor reaches inside of a burn-in socket. I have downward air impinging on a finned heat sink atop a burn-in socket inside which a semiconductor is generating heat. I also have horizontal air travelling in a direction that is transverse to the fins and exits through a pressure opening at atmospheric pressure. I have a persistent "vortex crosses pressure opening" warning. I have tried enlarging the domain so that the vortex moves/disappears but have had no change in the temperature plot. I have seen this warning in past simulations, but have not seen this type of curve behavior. What could be responsible for this and how can I fix it to get a smoother temperature plot?
Thanks,
Juan
Your inlet/out value on the vortex is very small, I only get concerned about those warnings if (1) the boundary is close to my area of interest and (2) the value is near 1.0
As for the erratic plot, it could be the result of a coarse mesh or large time steps which are causing some instability.