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Flow of suspensions in pipelines(Part 2: Two Mechanisms of Particle Suspension)
Author(s) -
Shook C. A.,
Daniel S. M.,
Scott J. A.,
Holgate J. P.
Publication year - 1968
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.5450460405
Subject(s) - settling , suspension (topology) , turbulence , mechanics , particle (ecology) , materials science , flow (mathematics) , particle laden flows , physics , thermodynamics , reynolds number , geology , mathematics , oceanography , homotopy , pure mathematics
The distribution of sand and nickel particles with height in a horizontal channel of rectangular cross section has been measured and eddy diffusivities have been computed from these measurements. Turbulent suspension of particles appeared to occur where the concentration of solid particles was low, the particle diameter was small (< 0.2 mm.) and the ratio of the settling velocity of the particles to the friction velocity of the flow was less than 0.2. Where these criteria were not satisfied, concentration profiles were observed to deviate significantly from the shape associated with turbulent suspension. These deviations are attributed to the effect of particle interactions investigated by Bagnold.