JSME International Journal Series B Fluids and Thermal Engineering
Online ISSN : 1347-5371
Print ISSN : 1340-8054
ISSN-L : 1340-8054
Effects of Bingham Viscosity on Flow in Curved Pipes
Shigeru TadaYasushi FukuiShuzo OshimaRyuichiro Yamane
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1994 Volume 37 Issue 2 Pages 322-327

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Abstract

Bingham plastic fluid flows through coiled pipes of circular cross section were experimentally studied. In the investigations, kaolin clay slurries were used as the Bingham plastic fluid. The effects of the Reynolds number Re or the Dean number De on the friction factor λc in the laminar steady flow of the Bingham plastic fluid flowing through coiled pipes were clarified. The apparent Reynolds number Reap, expected to play the equivalent role of Re in Newtonian fluids, was introduced using the similarity law of energy dissipation which was derived from a generalized equation of non-Newtonian fluid. It was clarified that the effects of the curvature of the pipes are greater in the case of greater concentration of the slurry, and that there exists a good correlation between the friction factor and the apparent Dean number Deap(defined according to Reap).

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