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 :
or
or
or
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 |
|
