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

Author:

Kaddiri Mourad1,Naïmi Mohamed1,Raji Abdelghani1,Hasnaoui Mohammed2

Affiliation:

1. Laboratory of Flows and Transfers Modelling (LAMET), Physics Department, Faculty of Sciences and Technologies, Sultan Moulay Slimane University, BP 523, Beni-Mellal, Morocco

2. Laboratory of Fluid Mechanics and Energetics (LMFE), Physics Department, Faculty of Sciences Semlalia, Cadi Ayyad University, BP 2390, Marrakech, Morocco

Abstract

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 (0m10), the flow behaviour index (0.6n1.4), and the Rayleigh number (0<Ra105), 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.

Publisher

Hindawi Limited

Subject

General Engineering

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