Entropy generation between two vertical cylinders in the presence of MHD flow subjected to constant wall temperature

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Publication Details

Author list: Mahian O., Oztop H., Pop I., Mahmud S., Wongwises S.

Publisher: Elsevier

Publication year: 2013

Journal: International Communications in Heat and Mass Transfer (0735-1933)

Volume number: 44

Start page: 87

End page: 92

Number of pages: 6

ISSN: 0735-1933

eISSN: 1879-0178

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84877133816&doi=10.1016%2fj.icheatmasstransfer.2013.03.005&partnerID=40&md5=a5bd6dc664679f9ffa61f1c22e296ec9

Languages: English-Great Britain (EN-GB)

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Abstract

An analytical solution is presented on the entropy generation due to mixed convection between two isothermal cylinders where a transverse magnetic field is applied to the system. The governing equations in cylindrical coordinates are simplified and solved to obtain the distribution of entropy generation and the effects of MHD flow on it. The results for the entropy generation number (NS), the Bejan number (Be) and average entropy generation number (NS,ave) are presented for different values of the Hartmann numbers, radius ratios and a flow parameter, Gr/Re. The results show that the entropy generation decreases with increases in the magnetic field. In addition, it is found that with decreases in the radius ratio, the effects of MHD flow on the entropy generation are reduced. ฉ 2013 Elsevier Ltd.

Keywords

Isothermal annulus, MHD flow, mixed convection