Project ForgeFluid Mechanics
Bernoulli's Equation & Flow
GATE 2014
Medium
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 __________.
0.064(± 0.005 accepted)
Explanation
Re=VD/ν=0.1×0.1/10⁻⁵=1000, which is laminar (Re<2300). For laminar flow, the Darcy friction factor f=64/Re=64/1000=0.064.
Source: GATE ME 2014 (Session 1 / Set-1) (2014)
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