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Journal of Porous Media
Facteur d'impact: 1.49 Facteur d'impact sur 5 ans: 1.159 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN Imprimer: 1091-028X
ISSN En ligne: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v15.i2.70
pages 187-196

SECOND LAW ANALYSIS FOR COMBINED CONVECTION IN NON-NEWTONIAN FLUIDS OVER A VERTICAL WEDGE EMBEDDED IN A POROUS MEDIUM

Rama Subba Reddy Gorla
Department of Mechanical Engineering, Cleveland State University, Cleveland, OH, 44115 USA; Department of Mechanical Engineering, University of Akron, Akron, Ohio 44325, USA; Department of Mechanical & Civil Engineering, Purdue University Northwest, Westville, IN 46391, USA
Ali J. Chamkha
Department of Mechanical Engineering, Prince Sultan Endowment for Energy and Environment, Prince Mohammad Bin Fahd University, Al-Khobar 31952, Kingdom of Saudi Arabia; RAK Research and Innovation Center, American University of Ras Al Khaimah, United Arab Emirates, 10021
Waqar A. Khan
Department of Mechanical Engineering, University of Waterloo, Waterloo, Ontario, N2L 3G1 Canada
P. V. S. N. Murthy
Department of Mathematics, Indian Institute of Technology, Kharagpur, West Bengal, 721302, India

RÉSUMÉ

The second law analysis for the combined convective heat transfer in a non-Newtonian boundary-layer flow over a wedge embedded in a porous medium is presented. Velocity and temperature fields are solved numerically under the similarity assumption. These results are used to compute the entropy generation number Ns, irreversibility ratio ø, and the Bejan number Be for a range of values of the viscosity index (n), streamwise distance (x), buoyancy parameter (λ), and viscous frictional parameter, G. The results show that the Bejan number increases with the viscosity index and the buoyancy parameter.

RÉFÉRENCES

  1. Bejan, A., A study of entropy generation in fundamental convective heat transfer.

  2. Bejan, A., A second law analysis in heat transfer.

  3. Gorla, R. S. R. and Kumari, M. , Nonsimilar solutions for mixed convection in non-Newtonian fluids along a wedge with variable surface temperature in a porous medium.

  4. Gorla, R. S. R. and Kumari, M. , Nonsimilar solutions for mixed convection in non-Newtonian fluids along a wedge with variable surface heat flux in a porous medium.

  5. Gorla, R. S. R. and Pratt, D. , Second law analysis of a non-Newtonian laminar falling liquid film along an inclined heated plate.

  6. Mahmud, S. and Fraser, R. A. , Second law analysis of forced convection in a circular duct for non-Newtonian fluids.

  7. Nag, P. I. K. and Kumar, N. , Second law optimization of convective heat transfer through a duct with constant heat flux.

  8. Nakayama, A. and Koyama, H. , Buoyancy-induced flow of non-Newtonian fluids over a non-isothermal body of arbitrary shape in afluid-saturated porous medium.

  9. Sahin, A. Z. , Effect of variable viscosity on the entropy generation and pumping power in a laminar fluid flow through a duct subjected to constant heat flux.


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