# How to calculate the flow rate in Vortex flow meter ? What is K factor ? Can you give me an example calculation to understand the same as better ?

- Vortex flow meters are flow sensors that detect the frequency of vortices shed by a bluff body placed in a flow stream.
- The frequency of the vortices is proportional to the flow velocity.

Where:

- f
_{v}is the frequency of vortex shedding. - D is the diameter of the pipe.
- w is the width of bluff body over diameter of pipe.
- K is the a constant for all fluids given design of meter. A k factor is introduced to compensate for the non-uniform profile of pipe flow.
- S is the Strouhal number, determined experimentally.

## What is K factor ?

- K-factor is a dividing factor.
- The term is usually encountered when dealing with pulse signals although analog K-factors are sometimes used.