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Quantitative dimensionless measure measure
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It depends on Reynolds number
and roughness LaTeX Math Inline body \rm Re
(see Fig. 1): LaTeX Math Inline body \epsilon
. LaTeX Math Inline body --uriencoded--f =f(%7B\rm Re%7D, \, \epsilon)
Fig. 1. Schematic chart showing how Darcy friction factor depends on Reynolds number
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In engineering practice one can use either Moody Chart or Darcy friction factor @model to estimate the actual value of Darcy friction factor .
See also
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Physics / Fluid Dynamics / Pipe Flow Dynamics / Darcy–Weisbach equation
[ Darcy friction factor @model ] [ Moody Chart ]
Reference
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