Hydraulics

Hah, I'll tell that to the professor on the exam Although I don't think he will give me any points for it! Thanks for your reply. I know the formula is empirical, so it is just based on experiments, but the professor literally said that there was a derivation...

Hi, Does someone know how to derivate the formula of White-Colebrook? The professor said this will probably be a question on the exam, but I have no idea how to do it... I've searched on the internet for quite a while and I can't find the derivation . This is the formula: I would really appreciate any help!