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Journal cover: International Journal of Numerical Methods for Heat & Fluid Flow

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Online from: 1991

Subject Area: Mechanical & Materials Engineering

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Unsteady laminar hydromagnetic flow and heat transfer in porous channels with temperature-dependent properties


Document Information:
Title:Unsteady laminar hydromagnetic flow and heat transfer in porous channels with temperature-dependent properties
Author(s):Ali J. Chamkha, (Department of Mechanical and Industrial Engineering, Kuwait University, Safat, Kuwait)
Citation:Ali J. Chamkha, (2001) "Unsteady laminar hydromagnetic flow and heat transfer in porous channels with temperature-dependent properties", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 11 Iss: 5, pp.430 - 448
Keywords:Absorption, Heat transfer, Magentic field, Porous medium, Viscous dissipation
Article type:Research Paper
DOI:10.1108/EUM0000000005529 (Permanent URL)
Publisher:MCB UP Ltd
Abstract:The problem of unsteady laminar fully-developed flow and heat transfer of an electrically-conducting and heat-generating or absorbing fluid with variable properties through porous channels in the presence of uniform magnetic and electric fields is formulated. The general governing equations which include such effects as magnetic field, electric field, porous medium inertia and heat generation or absorption effects are non-dimensionalized and solved numerically by the implicit finite-difference methodology. A representative set of numerical results for the transient and steady-state velocity and temperature profiles, the skin-friction coefficients at both the upper and lower walls of the channel as well as the heat transfer coefficient at the lower wall are presented graphically and discussed. Favorable comparisons with previously published work are performed and the results are in excellent agreement. A comprehensive parametric study is performed to show the effects of the Hartmann number, electric field parameter, inverse Darcy number, inertia parameter, heat generation or absorption coefficient, exponents of variable properties and the Eckert number on the solutions.



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