Technical Briefs

Magnetohydrodynamic Mixed Convection of a Cu-Water Nanofluid in a Vertical Channel

[+] Author and Article Information
A. Raisi

Assistant Professor
Engineering Faculty,
Shahrekord University,
P.O. Box 115,
Shahrekord 8818634141, Iran
e-mail: raisi@eng.sku.ac.ir

S. M. Aminossadati

Senior Lecturer
School of Mechanical and Mining Engineering,
The University of Queensland,
Queensland, QLD 4072, Australia
e-mail: uqsamino@uq.edu.au

B. Ghasemi

Engineering Faculty,
Shahrekord University,
P.O. Box 115,
Shahrekord 8818634141, Iran
e-mail: behzadgh@yahoo.com; ghasemi@eng.sku.ac.ir

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received October 12, 2011; final manuscript received February 18, 2013; published online June 6, 2013. Assoc. Editor: Patrick E. Phelan.

J. Heat Transfer 135(7), 074501 (Jun 06, 2013) (4 pages) Paper No: HT-11-1472; doi: 10.1115/1.4023880 History: Received October 12, 2011; Revised February 18, 2013

This technical brief numerically examines the mixed convection heat transfer of a Cu-water nanofluid in a parallel-plate vertical channel that is influenced by a magnetic field. An upward flow of Cu-water nanofluid enters the channel at a relatively low temperature and a uniform velocity. It is found that the magnetic field has dissimilar effects on the heat transfer rate at different Richardson numbers. The increase of solid volume fraction results in an increase of the heat transfer rate especially at low Richardson numbers.

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Grahic Jump Location
Fig. 1

A schematic diagram of the physical model

Grahic Jump Location
Fig. 4

Variation of average Nusselt number with solid volume fraction for different Richardson numbers (- - -:Ha = 20, —: Ha = 0)

Grahic Jump Location
Fig. 3

Variation of average Nusselt number with Richardson number for different Hartmann numbers (ϕ = 0.03)

Grahic Jump Location
Fig. 2

Validation of the present study against the results of Desrayaud and Lauriat [7] for Re = 300 and Gr = 1.59 × 105



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