Frottements et pertes de pression des fluides non newtoniens dans des conduites non circulaires |
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Authors: | Mohamed Mahfoud Salah Benhadid Michel Lebouché |
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Affiliation: | 1. Équipe de rhéologie, laboratoire de mécanique des fluides théorique et appliquée, faculté de physique, B.P. 32, El Alia BAB, Ezzouar 16111, Alger, Algerie;2. Laboratoire d''énergétique et de mécanique théorique et appliquée, URA CNRS 875, 2, avenue de la foret de la Haye, 54504 Vand?uvre-lès-Nancy, France |
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Abstract: | The study of fluid flow in a duct requires characteristic parameters of the flow and dimensionless numbers to correlate and compare experimental results. For Newtonian fluids in simple configurations, the definition of the Reynolds number is quite standard, but for non-Newtonian fluid flows in ducts with arbitrary shape of cross section, the dependence of the apparent viscosity with the shear rate requires a generalization of this dimensionless number. This note proposes a general method valid for a large class of non-Newtonian fluids and for all duct shapes. An application is developed for a viscoelastic flow through a rectangular duct. Results obtained in the present investigation are in a good agreement with available correlations. To cite this article: M. Mahfoud et al., C. R. Mecanique 333 (2005). |
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Keywords: | Rhéologie Écoulement de fluide non newtonien Perte de pression Facteur de frottement Conduite non circulaire Rheology Non-Newtonian fluid flow Pressure drop Friction factor Non-circular duct |
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