Hello everyone, For the purpose of my study I would like to know the relation between Pressure and Convection Heat Transfer. Especially the rough pressure when the convection becomes less significant. I did not find satisfying results on the forum. I have to study the global heat transfer through the wall (5 mm) of a cold chamber at 5 degree C, low pressure, and the environment at 22 degree C, atmospheric pressure. Thank you very much for any help or suggestion.