Colebrook

The Colebrook foriTuila (Colebrook, y. Inst. Civ. Eng. [London], II, 133-156 [1938-39]) gives a good approximation for the/-Re-( /D) data for rough pipes over the entire turbulent flow range ... [Pg.636]

Pipecalc 2.0, Gulf Publishing Company, Houston, Texas. Note Pipecalc 2.0 will calculate the compressibility factor, minimum pipe ID, upstream pressure, downstream pressure, and flow rate for Panhandle A, Panhandle B, Weymouth, AGA, and Colebrook-White equations. The flow rates calculated in the above sample calculations will differ slightly from those calculated with Pipecalc 2.0 since the viscosity used in the examples was extracted from Figure 5, p. 147. Pipecalc uses the Dranchuk et al. method for calculating gas compressibility. [Pg.10]

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]

For turbulent flow the empirical formula of Colebrook-White applies ... [Pg.783]

The Colebrook equation [6, 58] is considered a reliable approach to determining the friction factor, f (Moody factor)... [Pg.68]

Note that the terra e/D is the relative roughness from Figure 2-11. The solution of the above equation is trial and error. Colebrook [6] also proposed a direct solution equation that is reported [7] to have... [Pg.68]

If the Reynolds number is greater than 4,000, the flow will generally be turbulent and the friction factor can be calculated from the Colebrook equation ... [Pg.173]

For rough tubes in turbulent flow (7VRc > 4000), the von Karman equation was modified empirically by Colebrook to include the effect of wall roughness, as follows ... [Pg.162]

In the fully turbulent region, / is independent of /VRe, so the Colebrook equation reduces to... [Pg.162]

A reasonable guess might be based on the assumption that the flow conditions are turbulent, for which the Colebrook equation, Eq. (6-38), applies. [Pg.173]

The model for turbulent drag reduction developed by Darby and Chang (1984) and later modified by Darby and Pivsa-Art (1991) shows that for smooth tubes the friction factor versus Reynolds number relationship for Newtonian fluids (e.g., the Colebrook or Churchill equation) may also be used for drag-reducing flows, provided (1) the Reynolds number is defined with respect to the properties (e.g., viscosity) of the Newtonian solvent and (3) the Fanning friction factor is modified as follows ... [Pg.180]

Staunton D, Schlinkert R, Zanetti G, Colebrook SA, Campbell LD (2006) Cell-free expression and selective isotope labelling in protein NMR. Magn Reson Chem 44 S2-9... [Pg.114]

The aerobic transformations are considered limited by the reaeration, and Equation (6) in Table 4.7 is used to calculate the rate of oxygen supply. Based on the formula of Colebrook and White for a full-flowing circular pipe, the flow and velocity of the wastewater are determined as follows for the half-filled pipe ... [Pg.98]

Persuasive proof of sulfanilamide s true antibacterial prowess came from Leonard Colebrook and his team of researchers in the maternity ward of Queen Charlotte s Hospital in London (7, 8, 9). Managing to obtain samples of Prontosil late in 1935, Colebrook quickly demonstrated the drug s remarkable effectiveness in curbing puerperal fever. The utility was soon expanded to other severe streptococcal infections. [Pg.117]

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