Colebrook-White Equation
Colebrook-White equation, also called Colebrook equation, is used toiteratively solve the Darcy-Weisback friction factor. This equation uses US units. To convert between US and SI units, use our calculator.
Colebrook-White Equation formula |
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\(\large{ \frac{1}{\sqrt{f}} = -2 \; log_{10} \left( \frac{ \epsilon\ }{ 3.7 \; d_h } + \frac{ 2.51 }{ Re \; \sqrt{ f } } \right) }\) | ||
Symbol | English | Metric |
\(\large{ \epsilon }\) (Greek symbol epsilon) = absolute roughness | \(\large{ in }\) | \(\large{ mm }\) |
\(\large{ f }\) = friction factor | \(\large{ dimensionless }\) | |
\(\large{ d_h }\) = hydraulic diameter | \(\large{ in }\) | \(\large{ mm }\) |
\(\large{ Re }\) = Reynolds number | \(\large{ dimensionless }\) |
Tags: Flow Equations