I'm trying to answer the question I have asked here. It is really confusing as different references contradict each other as I have explained here. So far I have seen two different versions of heat equation for compressible fluids:
ρDeDt=−P(ˇ∇ˇνT)+ˇτ:ˇ∇ˇν
and
ρDhDt=−DPDt+ˇτ:ˇ∇ˇν
I would appreciate if you could help me know what is the correct form and if the ones above are equal how I can drive one from the other.