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Critical shear stress for incipient motion of non‐cohesive particles in open‐channel flows of pseudoplastic fluids
Author(s) -
Tamburrino Aldo,
Carrillo Daniela,
Negrete Felipe,
Ihle Christian F.
Publication year - 2016
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.22498
Subject(s) - reynolds number , laminar flow , mechanics , shear thinning , materials science , shear stress , thermodynamics , physics , turbulence , rheology , composite material
The results of a theoretical and experimental study on the conditions of incipient motion of non‐cohesive solid particles in laminar flows of pseudoplastic fluids are presented in the article. It is concluded that, for practical purposes, using a modified particle Reynolds number that includes the consistency coefficient and the flow index, the motion threshold condition is well defined by the Shields diagram, with a slight modification to that presented by Mantz for low Reynolds numbers. The range of particle Reynolds numbers covered in the study was from 0.026–12.56.