For a fully developed flow of water in a pipe having diameter

For a fully developed flow of water in a pipe having diameter 10 cm, velocity 0.1 m/s and kinematic viscosity 10–5 m²/s, the value of Darcy friction factor is ________.

Given, D = 10 cm = 0.1 m
V = 0.1 m/s
v = 10^–5 m² /s

R_e =	VD	=	0.1 × 0.1
	v		10^-5

Darcy friction factor =	64	(for laminar flow)
	R_e

=	64	= 0.064
	1000