A fluid with kinematic viscosity 0.4 × 10^{–4} m^{2}/s flows through a 80 mm diameter pipe. The maximum velocity for laminar flow will be :

SSC JE Mechanical Engineering 2014 Set 2 Paper

Question : 187 of 200

Marks: +1, -0

A fluid with kinematic viscosity 0.4 × 10

^{–4}

^{2}

/s flows through a 80 mm diameter pipe. The maximum velocity for laminar flow will be :

Solution:

K. V. (ν ) = 0.4 × 10^{-4} m^2\/s =µ/ ρ

Dia of pipe (d) = 80 mm = .08 m
for viscus flow Re < 2000

{ ρvd }/µ<2000

{v×0.08}/{0.4 ×10^{-4}}≤2000

v≤{2000×0.4×10^{-4}}/0.08

v ≤ 1m / s

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