How To Read Moody Diagram

How to read moody diagram. How do you read moodys diagram.

Using A Moody Chart

Then locate the pipes reynolds number on the bottom.

How to read moody diagram. How to read the moody chart. To determine the frictional factor find the relative roughness value for the pipe on the right. The coefficient can be estimated with the diagram below.

How to read a moody chart when solving many fluid dynamics problems be it steady state or transient the darcy weisbach friction factor f is necessary. Another common mistake when reading the moody diagram is improper interpolation between lines and points. Most of the fluid mechanics problems involve the determination of reynolds number.

In circular pipes this factor can be solved directly with the swamee jain equation as well as others however most of these equations are complicated and become cumbersome when iteration is. The moody friction factor λ or f is used in the darcy weisbach major loss equation. Both the reynolds number and relative roughness are unitless values when computed correctly therefore the moody chart is unitless so the same chart applies to us customary and si unit systems.

In these cases moody diagram or moody charts are really handy. Si based moody diagram. The problems can be solved using swamee jain equation but for the other types it is really difficult.

If the flow is transient 2300 re 4000 the flow varies between laminar and turbulent flow and the friction coefiicient is not possible to determine.

Pipes And Pipe Sizing