Final answer:
The Reynolds number determines whether the flow in a pipe is laminar or turbulent, based on its value compared to certain thresholds. If the friction factor and Reynolds number of a turbulent pipe flow are known, the flow can be categorized as turbulent.
Step-by-step explanation:
The Reynolds number (Re) is a dimensionless quantity that determines whether the flow in a pipe is laminar or turbulent. It is calculated using the formula Re = (uD)/ν, where u is the shear velocity, D is the pipe diameter, and ν is the kinematic viscosity.
For a given fluid, flow is laminar when Re < 2000 and turbulent when Re > 3000. When Re is between 2000 and 3000, the flow can be unstable and may oscillate between laminar and turbulent.
Based on the given information, if the friction factor and Reynolds number of a turbulent pipe flow are known, the flow can be categorized as turbulent.