# Fanning Friction Factor

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EmilyB.Fanning Friction Factor
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b2f729e4-478e-11e6-9770-bc764e2038f2

The Fanning Friction Factor is a dimensionless number used as a local parameter in continuum mechanics calculations. It is defined as the ratio between the local sheer stress and the local flow kinetic energy density: f=tau/(rhou^2/2), where:

• tau = local sheer stress
• rho = density of the fluid
• u = local flow velocity

## References

The formula and definition are from Wikipedia (https://en.wikipedia.org/wiki/Fanning_friction_factor).