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

Explanation

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 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: 1. Laminar flow: Reynolds no. 4000 Note: 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.