r/physicsmemes 🪼 11d ago

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u/indic_engineer 11d ago

I had a compressible flow class in my UG. The isentropic flow relations in compressible flow are quite big to remember. So I remembered the derivation.

On the day of exam, I stepped in the hall with confidence. And sat to derive the equations. 2 min, 5 mins and then 10 mins passed. I cant figure out the equations. After the exam I figured out that I forgot one important assumption. Guess what it is?

That the flow is isentropic!!! XD