Civil Engineering MCQAE Level Civil Engineering
For fully turbulent flow in a rough pipe, the Darcy friction factor f is determined by the:
Fluid MechanicsDarcy WeisbachMEDIUM
Choose the correct answer
A
Reynolds number only
B
Relative roughness e/D only
C
Both Re and e/D (Moody chart)
D
Pipe material density
Correct Answer
B. Relative roughness e/D only
Why is this the answer?
In the fully rough turbulent flow regime (high Reynolds number), the friction factor becomes independent of the Reynolds number and depends only on the relative roughness (e/D) as described by the Nikuradse or Colebrook-White equations.
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