If the Reynolds number is less than 2000, the flow in pipe is -

Concept: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.Reynolds Number = (inertial forces) / (viscous forces)Mathematically, Reynolds Number is\({Re} = \frac{{\rho Vd}}{\MU }\)Where, ρ = density, V = velocity, d = diameter, μ = viscosityReynolds 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:Laminar flow: Reynolds no. < 2000Critical flow: 2000 < Reynolds no. < 4000Turbulent flow: Reynolds no. > 4000Note:Reynolds no. less than 2000 (Laminar flow) is also known as viscous flow.With a strong predominance of inertial forces over viscous forces, the largest scales of fluid motion are underdamped i.e. there is not enough viscosity to dissipate their motions.