Fanning friction factor

AP = Pressure drop, Ib/fr / = Friction factor (Fanning = Moody s/4)... [Pg.29]

In the engineering community there are two types of friction factors - Fanning and Darcy. Although basically the same, they differ by a factor of four /nn = 4 ffm. The Darcy factor is used here. [Pg.200]

The transition from laminar to turbulent flow occurs at Reynolds numbers varying from ca 2000 for n > 1 to ca 5000 for n = 0.2. In the laminar region the Fanning friction factor (Fig. 2) is identical to that for Newtonian fluids. In the turbulent region the friction factor drops significantly with decreasing values of producing a family of curves. [Pg.96]

Fanning friction factor Darcy friction factor mass flux... [Pg.500]

If the friction factor is assumed to be OcRe ° where a is a constant, and the Fanning equation is solved for physical property terms, the result is... [Pg.508]

For laminar flow (Re < 2000), generally found only in circuits handling heavy oils or other viscous fluids, / = 16/Re. For turbulent flow, the friction factor is dependent on the relative roughness of the pipe and on the Reynolds number. An approximation of the Fanning friction factor for turbulent flow in smooth pipes, reasonably good up to Re = 150,000, is given by / = (0.079)/(4i e ). [Pg.55]

Fanning friction factor non dimensional stress-range reduction factor... [Pg.66]

Fanning friction factor /i for inner wall and / 2 for outer wall of annulus /l for ideal tube bank sldn friction drag coefficient Dimensionless Dimensionless... [Pg.549]

Friction Factor and Reynolds Number For a Newtonian fluid in a smooth pipe, dimensional analysis relates the frictional pressure drop per unit length AP/L to the pipe diameter D, density p, and average velocity V through two dimensionless groups, the Fanning friction factor/and the Reynolds number Re. [Pg.635]

For smooth pipe, the friction factor is a function only of the Reynolds number. In rough pipe, the relative roughness /D also affects the friction factor. Figure 6-9 plots/as a function of Re and /D. Values of for various materials are given in Table 6-1. The Fanning friction factor should not be confused with the Darcy friction fac tor used by Moody Trans. ASME, 66, 671 [1944]), which is four times greater. Using the momentum equation, the stress at the wall of the pipe may be expressed in terms of the friction factor ... [Pg.636]

FIG. 6-9 Fanning Friction Factors. Reynolds niimher Re = DVp/ i, where D = pipe diameter, V = velocity, p = fluid density, and i = fluid viscosity. (Based on Moody, Trans. ASME, 66, 671 [1.944].)... [Pg.636]

The value of C3 is 0.011454 in USCS units and 20.178 x 10 in SI units. The inputs for the calculation are Q (bbl/hr or mVhr) and pipeline length (miles or km), viscosity U (Centistokes), pipe diameter D (inches or meters), effective pipe roughness e, and pipeline lengths (miles or km). The Fanning friction factor is... [Pg.516]

Where ij. is defined as the kinematic viscosity (centistokes), and is a constant with a value of 2,213.8 in USCS units and 353.68 in SI units. An empirical relation for the Fanning friction factor is the Colebrook-White equation ... [Pg.517]

Since the Fanning friction factor "f" does not vary much, f =0.004 is a good approximation. However, it can be calculated from Re by the standard method from Table 6. [Pg.334]

See nomenclature for definition of symbols and units. The units presented are English engineering units, unless a conversion is required. The friction factor is the only experimental variable that must be determined by reference to the above equations and it is represented by Figure 2-3. Note that this may sometimes be referred to as the Fanning formula, and may be modified to )held a fric-... [Pg.53]

Figure 2-3. Moody or regular Fanning friction factors for any kind and size of pipe. Note the friction factor read from this chart is four times the value of the f factor read from Perry s Handbook, 6th Ed. [5]. Reprinted by permission, Pipe Friction Manual, 1954 by The Hydraulic Institute. Also see Engineering DataBook, 1st Ed., The Hydraulic Institute, 1979 [2]. Data from L. F, Moody, Friction Factors for Pipe Flow by ASME [1].

E = efficiency factor, which is really an adjustment to fit the data f = fanning friction factor qns = flow rate, SCF/day... [Pg.121]

Gas transmission factor, or sometimes termed efficiency factor, see Table 2-15, f = Fanning friction factor... [Pg.154]

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