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Can anyone tell me how significant are entrance effects for a fluid entering a circular pipe? Like the fully developed region, laminar region etc. comparison between these regions...
It talks about Vena contract and nothing about entrance effect. I mean a fluid enters with uniform speed inside a circular pipe and then just flows, I mean what's the big deal here? Its just entering and flowing....don't get itEntrance effects are very important.
http://en.wikipedia.org/wiki/Vena_contracta
google images 'vena contracta'