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Chemical Engineering Basics

Q1:

Friction factor for fluid flow in pipe does not depend upon the

A pipe length.

B pipe roughness.

C fluid density & viscosity.

D mass flow rate of fluid.

ANS:A - pipe length.

The friction factor for fluid flow in a pipe depends on several factors, but it does not depend on the pipe length. The other factors listed do influence the friction factor:

  1. Pipe roughness: Roughness of the pipe's inner surface affects the friction factor significantly. Smoother pipes have lower friction factors.
  2. Fluid density and viscosity: These properties of the fluid affect its ability to resist flow and hence impact the friction factor. Higher viscosity fluids typically have higher friction factors.
  3. Mass flow rate of the fluid: While the mass flow rate affects the velocity of the fluid, it doesn't directly influence the friction factor itself.
So, to summarize, the friction factor depends on pipe roughness, fluid density and viscosity, and it is independent of pipe length and mass flow rate of the fluid.
 



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