Answer / sanjeev soni

f = 64 / Re for laminar flow through pipe

Answer / nader moustafa

The question is not fully clear Reynold number is define as
the R= VD/kinamatic viscosity . where V is the mean
velocity and D is the pipe inner diameter. Reynolds is used
for many purposes in fluid mechanics one of them is the
determination of friction factor. As mentioned in Answe
one. It is true that f=64/Re for laminar flow. Whereas for
turbulent flow coleebrook eqation should be used

Answer / komal bhosale

f = function of Re & relative roughness

Answer / raji

laminar flow
f=16/Nre (dimensionless form of hagen-poiseuille)
turbulent flow
colebrook eqution

Answer / nagesh

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