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Title: The hydraulic conveying of granular materials.
Author: Turtle, Robert Barry.
ISNI:       0000 0001 3540 0029
Awarding Body: University of London
Current Institution: University of London
Date of Award: 1952
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An investigation has bean carried out an the hydraulic conveying of suspensions of granular materials in a 1. inch diameter pipe. The conditions of flow investigated cover the range normally encountered in industry, from the fully turbulent state to formation of a bed of material in the bottom of the pipe. Some observations have been made of the modes of flow which are encountered outside this range, to the choking paint, The design and construction of the experimental plant is discussed in some detail. It consisted of a recirculatory system, powered by a rubber lined centrifugal pump, and had a test section of 90 ft., divided into several sections over which pressure drops have been measured The solid materials which have been used cover a wide range of size and density, and the variation of velocity and pressure drop with concentration for the various particles has been determined. For each substance, graphs relating these variables have been obtained. In general, at a particular pressure drop, increase in particle concentration produces a reduction in velocity, however, for particles of density not very much greater than water, if the initial velocity be high enough, no reduction is found on the addition of solid particles until a higher concentration is reached, A dimensionless plot has been derived to correlate the results shown by the various substances. This takes the form of a boundary curve, which persists while a bed of material is present in the bottom of the pipe, and branches which depend on the particle size and concentration, divergence from the boundary curve occurring when the bed disappears. The relationship between this set of curves for flow in a closed pipe, and flow in open flumes is shown, the difference being that in the latter case the bed is always present (for river work) and only the boundary curve applies.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available