- vCommons Home
- Darcy Friction Factor

# Darcy Friction Factor

Not Reviewed

Equation / Last modified by EmilyB on 2016/07/11 17:35
`f = `

Darcy Friction Factor

Variable | Instructions | Datatype |
---|---|---|

`(Re)"Reynold's number"` | Enter Reynold's number | Decimal |

Type

Equation

Category

vCommons

Contents

1 variables

Tags:

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).