How to Read a Moody Chart (Moody Diagram)

Moody chart - Alchetron, The Free Social Encyclopedia

The Moody diagram gives the Darcy friction factor, f, in terms of Reynolds number and relative roughness. The Fanning friction factor for pipe flow is defined as fF=(τw)/((1)/(2) ρ∇^2) where τw is the wall shear stress in the pipe. Show that the relation between the Darcy and Fanning friction factors for fully developed pipe flow is given by f=4 fF | Numerade