The most common way of expressing the pressure drop of a piped fluid is to use the D'Arcy-Weisbach equation. The D'Arcy-Weisbach equation is valid for fully developed, steady state and incompressible flow. The D'Arcy-Weisbach equation with the Moody Diagram are considered to be the most accurate model for estimating frictional head loss in steady pipe flow.

\Delta H_f=f\frac{L}{D}\frac{V^2}{2g}

where

\Delta H_f= Head Loss due to friction

f = Friction Factor

L = Length of Pipe, Ft

D = Inside Diameter of Pipe, Ft

V = Velocity of the fluid, Ft/sec

g = 32.174 \frac{ft}{s^2} = 9.806 \frac{m}{s^2}

Products

Click below for our pressure drop calculator:

http://www.piping-designer.com/store/calculations/11-pressuredrop-velocity-calculator.html

Retrieved from "http://www.piping-designer.com/Darcy-Weisbach_Equation"
Top of Page