Friction Factor Correlations 10

Friction Factor Correlations 10 - D f F This equation...

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1 of 2 Friction Factor Correlations There are several friction factor–Reynolds number correlations. The following expressions for the Fanning friction factor by Churchill (1977) are applicable to both laminar and turbulent flow regimes:  12 1 2 3 12 1 8 2 B A Re f F where 16 9 . 0 27 . 0 7 1 ln 457 . 2 D Re A and 16 530 , 37 Re B The Swamee and Jain (1976) equation is a less complex correlation for turbulent flow: 2 9 . 0 10 2 9 . 0 74 . 5 7 . 3 log 0625 . 0 74 . 5 7 . 3 ln 3314 . 0 Re D Re
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Unformatted text preview: D f F This equation matches the Colebrook-White equation within one percent for 10-6 < /D < 10-2 and 5000 < Re < 10 8 . The Blasius equation is widely used for turbulent flow in smooth pipes ( / D 0), 25 . 079 . Re f F 4,000 < Re < 100,000 2 of 2 References Churchill, S. W. Friction Factor Equation Spans all Fluid Flow Regimes, Chemical Engineering , November 7, 1977, 91-92. Swamee P.K. and Jain, A.K. Explicit equations for pipe flow problems, J. of Hydraulics Division, , ASCE 102(5), 1976, 657-664....
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This note was uploaded on 10/11/2011 for the course CHE 3013 taught by Professor Staff during the Fall '11 term at Oklahoma State.

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Friction Factor Correlations 10 - D f F This equation...

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