# Critical Velocity Calculator

## About Critical Velocity Calculator (Formula)

A Critical Velocity Calculator calculates the critical velocity of a liquid flowing through a pipe based on its Reynolds number, coefficient of viscosity, inner diameter, and density.

As a liquid flows from laminar to turbulent, it changes its critical velocity. It is important to be able to calculate the critical velocity accurately because this change in flow can significantly impact the transport of materials and energy in pipelines.

The formula used by the calculator is relatively straightforward:

Vc = (R*u) / (D*p)
Where:
• Vc is the critical velocity (m/s)
• R is the Reynold’s number
• u is the coefficient of viscosity (m^2/s)
• D is the inner diameter of the pipe (m)
• p is the density of the liquid (kg/m^3)

During laminar flow, liquid flows in layers, whereas during turbulent flow, the liquid flows irregularly and chaotically. The critical velocity is the speed at which the liquid flow changes from laminar to turbulent. In fluid mechanics, the critical velocity is a parameter that is used to determine when a fluid will transition from laminar to turbulent flow under certain conditions.

A critical velocity can be calculated and displayed on the webpage by entering the values of these parameters into the calculator. As a quick and easy way to determine a liquid’s critical velocity, this tool can be useful to engineers and scientists working in fluid dynamics.