User:Latexman

On 10/2/2013, I corrected the Haaland equation in "Darcy Friction Factor Formulae" to yield the Darcy friction factor as follows:


 * $$   \frac{1}{\sqrt {f}} = -1.8 \log_{10} \left[ \left( \frac{\varepsilon/D}{3.7} \right)^{1.11} + \frac{6.9}{\mathrm{Re}} \right] $$

Originally, the 1.8 constant was listed as 3.6 which was yielding the Fanning friction factor. Darcy friction factor = 4 X Fanning friction factor.