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Transition from horizontal to vertical conveying of complex slurry suspensions in laminar flow
Author(s) -
Graham L. J. W.,
Wu J.,
Pullum L.
Publication year - 2011
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.20470
Subject(s) - laminar flow , slurry , mechanics , materials science , yield (engineering) , volumetric flow rate , geotechnical engineering , geology , composite material , physics
This paper presents the results of a preliminary investigation into the vertical pipeline conveying of coarse particles using non‐Newtonian carrier fluids. It was found that the particles were transported as a sliding bed, even in the vertical pipe, with the particles reporting to one side of the pipe or the other, depending on the flow rate and the transition geometry. Shutdown tests showed that particles could settle back down the vertical pipe if there was stratification, even if the carrier had sufficient yield stress for static stability of dispersed particles. This was prevented by using carrier fluids with further increased yield stress.