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Transition to turbulence in a heated non-Newtonian pipe flow

Article dans une revue avec comité de lecture
Author
ccROMANO, Francesco
531216 Laboratoire de Mécanique des Fluides de Lille - Kampé de Fériet [LMFL]
CHARLES, Antoine
1076752 Ecole nationale supérieure Mines-Télécom Lille Douai [IMT Nord Europe]
DOTTORI, François
1076752 Ecole nationale supérieure Mines-Télécom Lille Douai [IMT Nord Europe]
AMIR BAHRANI, S.
1076752 Ecole nationale supérieure Mines-Télécom Lille Douai [IMT Nord Europe]

URI
http://hdl.handle.net/10985/24542
DOI
10.1063/5.0064456
Date
2021-09
Journal
Physics of Fluids

Abstract

A simplified mono-dimensional model for investigating the transition to turbulence in nonisothermal and non-Newtonian pipe flows is proposed. The flow stability is analyzed within the framework of such a model, showing that uniformly heating the pipe wall leads to an earlier transition to turbulence, while differentially heating the pipe wall produces a stabilizing effect. For power-law fluids, we also demonstrate that an increase in the power-law index, i.e., passing from shear-thinning to shear-thickening fluids, leads to a stabilization of the system.

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