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Large Reynolds number is an indication of
1. Streamline flow
2. Steady flow
3. Laminar flow
4. Highly turbulent flow

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Correct Answer - Option 4 : Highly turbulent flow

Explanation:

Reynolds Number:

  • It is the ratio of the inertial forces to viscous forces.
  • It is a dimensionless number used to categorize the fluid systems in the effect of viscosity is important in controlling the velocities or the flow pattern of a fluid.


Mathematically, Reynolds Number is

\(Reynolds\ Number = \frac{inertial forces}{ viscous forces}\)

\({Re} = \frac{{\rho Vd}}{\mu }\)

Where,  ρ = density, V = velocity, d = diameter, μ = viscosity

Reynolds number is important for decreasing the transport properties of a fluid or a particle moving in a fluid.

Flow-through pipes are classified into three main categories:

  • If Reynold number is very low (less than 2000) then flow is called Laminar flow. 
  • If Reynold number is in the range of 2000 to 4000 then flow is called transition flow.
  • If Reynold number is very high (greater than 4000) then flow is called Turbulent flow.

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