English

Critical Velocity and Reynolds Number

Advertisements

Topics

Estimated time: 3 minutes
Maharashtra State Board: Class 11

Definition: Critical Velocity

The velocity of liquid flow up to which its flow is streamlined and above which its flow becomes turbulent is called critical velocity.

Maharashtra State Board: Class 11

Definition: Reynold's Number

A pure number which determines the nature of flow of liquid through a pipe, defined as the ratio of the inertial force per unit area to the viscous force per unit area for a flowing fluid, is called Reynold's number.

Maharashtra State Board: Class 11

Formula: Reynolds' Number

\[R_n=\frac{v_c\rho D}{\eta}\]

where:

  • vc​ = critical velocity of the liquid
  • ρ = density of the liquid
  • D = diameter of the pipe
  • η = coefficient of viscosity of the liquid
Advertisements
Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×