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ISRN Thermodynamics
Volume 2012 (2012), Article ID 614712, 10 pages
Research Article

Rayleigh-Bénard Convection of Non-Newtonian Power-Law Fluids with Temperature-Dependent Viscosity

1Laboratory of Flows and Transfers Modelling (LAMET), Physics Department, Faculty of Sciences and Technologies, Sultan Moulay Slimane University, BP 523, Beni-Mellal, Morocco
2Laboratory of Fluid Mechanics and Energetics (LMFE), Physics Department, Faculty of Sciences Semlalia, Cadi Ayyad University, BP 2390, Marrakech, Morocco

Received 30 September 2012; Accepted 16 October 2012

Academic Editors: G. L. Aranovich, P. Espeau, and H. Hirao

Copyright © 2012 Mourad Kaddiri et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Two-dimensional steady-state Rayleigh-Bénard convection of thermodependent power-law fluids confined in a square cavity, heated from the bottom and cooled on the top with uniform heat fluxes, has been conducted numerically using a finite difference technique. The effects of the governing parameters, which are the Pearson number , the flow behaviour index , and the Rayleigh number , on the flow onset, flow structure, and heat transfer have been examined. The heatlines concept has been used to explain the heat transfer deterioration due to temperature-dependent viscosity effect that m expresses.