Moody Friction Factor Moody Friction Factor Calculator Calculator

By Robert Porter By Robert Porter

Justin AlderJustin Alder

Introduction Introduction Easily calculate the moody friction factorEasily calculate the moody friction factor Used in correlation with the thermo properties Used in correlation with the thermo properties

calculator (designed by calculator (designed by Jon Isaacson). Swamee–Jain equation (an approximation of the (an approximation of the

implicit Colebrook–White equation)implicit Colebrook–White equation)

(Swamee, P.K.; Jain, A.K. (1976). "Explicit equations for pipe-flow problems". Journal of the Hydraulics Division (ASCE) 102 (5): 657–664)

The WorksThe Works Use the Use the Jon Isaacson TP calculator to get the density and dynamic density and dynamic

viscosity at the given temperature of the desired fluid viscosity at the given temperature of the desired fluid

InputInput::

density, dynamic viscosity, diameter, pipe type, mean density, dynamic viscosity, diameter, pipe type, mean velocity/mass flow rate/volumetric flow rate velocity/mass flow rate/volumetric flow rate

Out putOut put: :

moody friction factor,moody friction factor,

flow type, flow type,

Reynolds number, Reynolds number,

relative roughnessrelative roughness

What's the Advantage?What's the Advantage? Used in many ME classes, or for any application in Used in many ME classes, or for any application in

which you need the moody friction factor head loss which you need the moody friction factor head loss etc.etc.

Don’t have to Don’t have to read off of a read off of a complicated complicated chart. chart.

Probability of Probability of error is error is decreased.decreased.

ExampleExampleChapter 8 problem #2 Find the Change in Pressure. Chapter 8 problem #2 Find the Change in Pressure.

Solution:Solution: