Fanning friction factor


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Fanning friction factor

[′fan·iŋ ′frik·shən ‚fak·tər]
(fluid mechanics)
A dimensionless number used in studying fluid friction in pipes, equal to the pipe diameter times the drop in pressure in the fluid due to friction as it passes through the pipe, divided by the product of the pipe length and the kinetic energy of the fluid per unit volume. Symbolized f.
References in periodicals archive ?
Finally, the criterial relations between Fanning friction factor f and Metzner-Reed Reynolds number [Re.
The pressure drop of per unit length was transformed into Fanning friction factor f, which is based on the definition as
They related fanning friction factor with generalized Reynolds number.
The average pressure loss due to friction or wall shear stress is represented by the Fanning friction factor over the one-period module of the duct, and it is determined from
This is due to the fact that even though Fanning friction factor f decreases with the increase in Re this drop is nonlinear, and the corresponding increase in Nu or is not sufficient to make the value of (j/f) large (Huzaayin et al 2009) In other words, the relative frictional penalty increases with Re to limit or reduce enhancement that would yield high area goodness factor Furthermore, as can be seen from Figure 4, (j/f) increases with the increase of period length as Case 1 outperform Cases 2 and 3: likewise.