# Darcy Friction Factor

Not Reviewed
f =
Darcy Friction Factor
Variable Instructions Datatype
(Re)"Reynold's number" Enter Reynold's number Decimal
Rating
ID
EmilyB.Darcy Friction Factor
UUID
b8d87965-478c-11e6-9770-bc764e2038f2

The Darcy Friction Factor is a dimensionless quanty used in the Darcy-Weisbach equation, for the description of friction losses in pipe flow as well as open-channel flow. It is four times larger than the Fanning friction factor.  The Darcy Friction Factor for laminar flow in a circular flow in a circular pipe (Reynold's number less than 2320) is given by the following formula: f=64/(Re) where:

• f = Darcy Friction Factor
• Re = Reynold's number

## References

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