Second law characteristics of heat transfer and fluid flow due to free convection of non-Newtonian fluids over a horizontal plate with prescribed surface temperature in a porous medium are analyzed. Velocity and temperature fields are obtained numerically using an implicit finite difference method under the similarity assumption and these results are used to compute the entropy generation rate , irreversibility ratio , and the Bejan number Be for both Newtonian and non-Newtonian fluids. The effects of viscous frictional parameter , Rayleigh number Ra, temperature variation , axial distance on the dimensionless entropy generation rate , and the Bejan number Be are investigated for Newtonian and non-Newtonian fluids and presented graphically.
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Research Papers
Second Law Analysis for Free Convection in Non-Newtonian Fluids Over a Horizontal Plate Embedded in a Porous Medium: Prescribed Surface Temperature
W. A. Khan,
W. A. Khan
Department of Mechanical Engineering,
e-mail: wkhan_2000@yahoo.com
National University of Sciences and Technology
, Karachi, Pakistan
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Rama Subba Reddy Gorla
Rama Subba Reddy Gorla
Department of Mechanical Engineering,
Cleveland State University
, Cleveland, OH 44114
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W. A. Khan
Department of Mechanical Engineering,
National University of Sciences and Technology
, Karachi, Pakistane-mail: wkhan_2000@yahoo.com
Rama Subba Reddy Gorla
Department of Mechanical Engineering,
Cleveland State University
, Cleveland, OH 44114J. Heat Transfer. May 2011, 133(5): 052601 (7 pages)
Published Online: February 2, 2011
Article history
Received:
April 18, 2010
Revised:
November 12, 2010
Online:
February 2, 2011
Published:
February 2, 2011
Citation
Khan, W. A., and Gorla, R. S. R. (February 2, 2011). "Second Law Analysis for Free Convection in Non-Newtonian Fluids Over a Horizontal Plate Embedded in a Porous Medium: Prescribed Surface Temperature." ASME. J. Heat Transfer. May 2011; 133(5): 052601. https://doi.org/10.1115/1.4003045
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