K C Wilson; et al's Slurry transport using centrifugal pumps PDF

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1985). Fluid Mechanics and Transfer Processes, Cambridge University Press. Newton, I. (1726). Principia Mathematica Philosophiae Naturalis. , Book II Scholium to Proposition XL, Royal Society, London. Reprinted by University of Glasgow, 1871. See also Newton's Principia, Motte's Translation Revised, Vol. 1, University of California Press, Berkeley, CA, 1962. Nikuradse, J. (1933). Strömungsgesetze in rauhen Rohren, Forschungsheft - Verein deutsche Ingenieure, No. 361. J. (1974). Turbulent Flows in Engineering.

12 m^/s through a standard 8inch steel pipe. Calculate: (a) the mean velocity and pipe Reynolds number; (b) the Moody friction factor; (c) the hydraulic gradient; (d) the thickness of the sub-layer; (e) the shear velocity (f) the hydraulic power required. 2064 m. 59 m/s This mean velocity is towards the low end of the range typically used for settling slurries. 1). 002x10' Because Re is dimensionless, the same value is obtained whatever system of units is used. Note that Re is high and the flow is well into the turbulent range.

The same result can be obtained directly firom a graph of the relationship given by Eq. 33. This plot is often known as the 'Moody diagram' or the 'Stanton-Moody diagram'. The portion of the diagram that is of interest here is displayed on Fig. 10. Various regions can be distinguished on the Moody diagram. 34) This range corresponds to laminar flow, and Eq. 34 is simply Eq. 25 written in terms of the dimensionless groups introduced above. 10. Pipe friction factor in normal operating range For Re between about 2,000 and 3,000, flow can be laminar or turbulent; in industrial practice, it will almost always be turbulent.

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