Fanning friction factor
Fanning friction factor is proportional to shear stress at pipe/conduit wall as number of velocity heads and is used in momentum transfer in general and turbulent flow calculations in particular. It is equivalent to (1/4) the Darcy friction factor. It is normally defined in one of the following forms :
![](https://processassociates.com/wp-content/uploads/2024/04/Fanning-Friction-Factor-3-e1713515967661.png)
or
![](https://processassociates.com/wp-content/uploads/2024/04/Fanning-Friction-Factor-4-e1713516038503.png)
![](https://processassociates.com/wp-content/uploads/2024/04/Fanning-Friction-Factor-1-2-e1713516519199.png)
or
![](https://processassociates.com/wp-content/uploads/2024/04/Fanning-Friction-Factor-5-e1713516698805.png)
Fanning Friction Factor Calculator
Formula 1
Formula 2
Formula 3
Formula 4
Where: | ||
d | = | Diameter |
delta-P | = | Pressure drop |
dP/dL | = | Pressure drop per unit length |
gc | = | Dimensional constant |
G | = | Mass velocity |
L | = | Length |
rho | = | Density |
V | = | Velocity |