Mechanical Engineering > GATE 2025 > Pipe Flow
For a fully-developed pipe flow, which of the following options is/are correct?
A
For the same maximum velocity, the average velocity is higher in the turbulent regime than that of the laminar regime
B
Compressibility effects are important if Mach number is less than 0.3
C
For laminar flow, the friction factor is independent of surface roughness
D
For laminar flow, friction factor decreases with decrease in Reynolds number

Correct : a

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