The Flow in a Pipe is Laminar if

Answer: A. Less than 2000

The flow in a pipe is laminar if the Reynold’s number is less than 2000.

Solution

Reynolds number can be defined for pipe flow is R_e=ρVD/μ=VD/ν

Where,

ρ= Density of fluid

V = Velocity of fluid in Pipe

D = Diameter of pipe

μ= Dynamic viscosity of Fluid

ν= Kinematic viscosity of fluid

If R_e ≤ 2000 – Laminar flow will occur in pipe flow

If 2000_e<4000 – Transition will occur in pipe flow

If  R_e ≥ 4000 – Turbulent flow will occur in pipe flow

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