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Entropy 2016, 18(5), 131; doi:10.3390/e18050131

Analytical Modeling of MHD Flow over a Permeable Rotating Disk in the Presence of Soret and Dufour Effects: Entropy Analysis

1
Young Researchers & Elite Club, Hamedan Branch, Islamic Azad University, 65181-15743, Hamedan, Iran
2
Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Tongji University, Shanghai 201804, China
3
ENN-Tongji Clean Energy Institute of Advanced Studies, Shanghai 201804, China
4
DST-NRF Centre of Excellence in Mathematical and Statistical Sciences, School of Computer Science and Applied Mathematics, University of the Witwatersrand, Johannesburg, Private Bag 3, Wits 2050, South Africa
5
Department of Industrial Engineering, University of Parma, Parma 43124, Italy
*
Author to whom correspondence should be addressed.
Academic Editors: Kevin H. Knuth and Heinz Herwig
Received: 15 February 2016 / Revised: 28 March 2016 / Accepted: 1 April 2016 / Published: 26 April 2016
(This article belongs to the Special Issue Entropy in Nanofluids)
View Full-Text   |   Download PDF [3877 KB, uploaded 26 April 2016]   |  

Abstract

The main concern of the present article is to study steady magnetohydrodynamics (MHD) flow, heat transfer and entropy generation past a permeable rotating disk using a semi numerical/analytical method named Homotopy Analysis Method (HAM). The results of the present study are compared with numerical quadrature solutions employing a shooting technique with excellent correlation in special cases. The entropy generation equation is derived as a function of velocity, temperature and concentration gradients. Effects of flow physical parameters including magnetic interaction parameter, suction parameter, Prandtl number, Schmidt number, Soret and Dufour number on the fluid velocity, temperature and concentration distributions as well as entropy generation number are analysed and discussed in detail. Results show that increasing the Soret number or decreasing the Dufour number tends to decrease the temperature distribution while the concentration distribution is enhanced. The averaged entropy generation number increases with increasing magnetic interaction parameter, suction parameter, Prandtl number, and Schmidt number. View Full-Text
Keywords: entropy generation; heat and mass transfer; MHD flow; rotating disk; HAM; Soret effect; Dufour effect entropy generation; heat and mass transfer; MHD flow; rotating disk; HAM; Soret effect; Dufour effect
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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. (CC BY 4.0).

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MDPI and ACS Style

Freidoonimehr, N.; Rashidi, M.M.; Abelman, S.; Lorenzini, G. Analytical Modeling of MHD Flow over a Permeable Rotating Disk in the Presence of Soret and Dufour Effects: Entropy Analysis. Entropy 2016, 18, 131.

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