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Viscosity of suspensions of coal in mineral oil
Author(s) -
Moreland C.
Publication year - 1963
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450410110
Subject(s) - slurry , suspension (topology) , laminar flow , viscosity , volume (thermodynamics) , particle (ecology) , particle size , particle size distribution , coal , mineralogy , chemistry , newtonian fluid , coal slurry , mineral oil , materials science , thermodynamics , geology , metallurgy , composite material , physics , mathematics , homotopy , pure mathematics , oceanography , organic chemistry
Viscosity data for slurries of five solid particle systems suspended in a mineral oil are presented for solid concentrations up to 50% by volume. At volume concentrations of less than 30% the results are well represented by the Einstein equation in its fluidity form, the constant varying with the system between 2.65 and 3.15, (as compared with 2.5 in the theoretical equation). At higher concentrations the slurries are non‐Newtonian, and no satisfactory correlation is available in this region, very little complete data for the high concentration region have been published. Slurry viscosities are greater for smaller particles, and are greater for irregular particles than for spherical particles. Slurry viscosities in regions of high concentration can be considerably reduced by careful selection of particle size distribution. Pressure gradients measured in an experimental pipeline carrying a suspension of coal in oil in laminar flow could not have been predicted using the viscosities determined in the laboratory.