# Vortex Shedding Frequency and Volume Flow Rate

## The vortex shedding frequency created around a bluff body and flow rate

### Vortex Shedding Frequency

The vortex shedding frequency around a bluff body can be calculated as

f = Sr v / d (1)

where

f = vortex shedding frequency (Hz)

Sr = Strouhal number (dimensionless)

v = flow velocity (m/s)

d = bluff body diameter

### Volumetric Flowrate

The volumetric flowrate from the shredding frequency can be calculated as

q = A f / k (2)

where

q = volumetric flowrate (m^{3}/s)

A = cross sectional area of the vortex orifice (m^{2})

k = a constant for all fluids given design of meter

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