Critical Velocity
Critical Velocity: Overview
This topic covers concepts, such as, Condition for Start of Turbulence, Reynolds Number, Condition for Laminar Flow, Critical Velocity & Significance of Reynolds Number etc.
Important Questions on Critical Velocity
If is the density and is coefficient of viscosity of fluid which flows with a speed in the pipe of diameter , the correct formula for Reynolds number is

Here we know that for turbulent flow, we need a certain limit of Reynolds number. So, what is Reynold's number?

Water from a pipe is coming at a rate of liters per minute. If the radius of the pipe is the Reynolds number for the flow is of the order of: (density of water = coefficient of viscosity of water

Water from a pipe is coming at a rate of liters per minute. If the radius of the pipe is the Reynolds number for the flow is of the order of: (density of water = coefficient of viscosity of water

What would be the Reynolds number if the flow is streamlined?

What would be the Reynolds number if the flow is turbulent?

Which of the following options represent the ratio of inertial force to viscous force?

A liquid with coefficient of viscosity poise is flowing in a pipe of radius such that the rate of volume flow is . Determine the Reynolds number

A flow of liquid is streamline, if the Reynold's number is

In an unsteady flow the velocity at point in the flow varies with _________.

In a turbulent flow, the velocity of the liquid in contact with the walls of the tube is
