Colebrook-White equation

It has been suggested that this article or section be merged into Frictional pressure drop. (Discuss)

The Colebrook-White equation is used to iteratively solve for the Darcy-Weisbach friction factor f.

For Free Surface Flow:

$\frac{1}{\sqrt{f}} = -2 \log (\frac{e}{12R} + \frac{2.51}{Re\sqrt{f}})$

For Full Flow (Closed Conduit):

$\frac{1}{\sqrt{f}} = -2 \log (\frac{e}{14.8R} + \frac{2.51}{Re\sqrt{f}})$

Where f is a function of:

Because the iterative search for the correct f value can be quite time-consuming, the Swamee-Jain equation can be used to solve directly for f.

References

2002, Computer Applications In Hydraulic Engineering, 5th Ed., Haestad Press, pg. 16

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Colebrook-White_equation". A list of authors is available in Wikipedia.

Read what you need to know about our industry portal chemeurope.com.

Find out more about the company LUMITOS and our team.

Find out how LUMITOS supports you with online marketing.

The LUMITOS industry portals