6813Chemical EngineeringMedium
In turbulent flow, a rough pipe has the same friction factor as a smooth pipe________?
AWhen the friction factor is independent of the Reynold’s number
BWhen the roughness projections are much smaller than the thickness of the laminar film
CEverywhere in the transition zone
DIn the zone of complete turbulence
Correct answer
B. When the roughness projections are much smaller than the thickness of the laminar film
Explanation
The correct answer is When the roughness projections are much smaller than the thickness of the laminar film.