Civil Engineering > GATE 2018 SET-2 > Fluid Mechanics
A rough pipe of 0.5 m diameter, 300 m length, and roughness height of 0.25 mm carries water
(kinematic viscosity = 0.9 × 10-6 m2/s) with a velocity of 3 m/s.
Friction factor (f) for laminar flow is given by f = 64/Re, and for turbulent flow, it is given by:
1/√f = 2 log10(r/k) + 1.74,
where Re = Reynolds number, r = radius of pipe, k = roughness height, and g = 9.81 m/s2.
The head loss (in m, up to three decimal places) in the pipe due to friction is _______.
Correct : 4.50 to 4.70
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