Water flows through a 100 mm diameter pipe with a velocity

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Water flows through a 100 mm diameter pipe with a velocity of 0.015 m/sec. If the kinematic viscosity of water is 1.13 × 10^–6 m² /sec, the friction factor of the pipe material is

1. 0.0015
2. 0.032
3. 0.037
4. 0.048

Correct Option: D

Re =	0.015 × 0.1	= 1327 (< 2000)
	1.13 × 10^-6

∴ It is laminar flow. (Re < 2000)

Friction factor, f =	64	= 0.048
	Re