How To Read Moody Diagram

An introduction to the famous moody chart. Si based moody diagram.

Moody Diagram Moody 1944 Reproduced By Permission Of Asme

So lets get into the moody chart.

How to read moody diagram. We use the moody chart often to estimate frictional factors. How to read a moody chart moody diagram procedure. Refer to the moody chart.

Say we are calculating a reynolds number having value of 4x104. This reynolds number indicates the turbulent flow. You have to mark that point.

The coefficient can be estimated with the diagram below. 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. Select a relative roughness 0003.

The friction factor can usually be interpolated between the laminar value at re 2300 and the turbulent value at re 4000. If you assume a friction factor i like 002 jump to step 10. If the reynolds number falls in the laminar or transition range refer to appropriate equations.

Now follow the image. Follow the curve contours in the left. Lets imagine we calculate a reynolds number of 4x104 yes im rigging for simplicity.

If done correctly you will converge at the same answer. To download the notes i use for these videos please click the following link. We have to follow this line our reynolds number from before.

How to read moody diagram simulation fouling in axial flow pressor using a throughflow supplies for alcohol ink painting what do i need to create an alcohol ink painting you need these three things 1 your hands 2 alcohol ink and 3 something to paint on yes its. As with many fluid mechanics problems the first order of business is to determine. Both the reynolds number.

Other things to be aware of. If however the flow is in the turbulent range we are ready to proceed with the moody chart.

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