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Three-dimensional combined radiation-magnetoconvection of low electrically conductive dielectric oxide melt

Abdullah A.A.A. Al-Rashed (Department of Automotive and Marine Engineering Technology, The Public Authority for Applied Education and Training, Kuwait)
Lioua Kolsi (Department of Mechanical Engineering, College of Engineering, Hail University, Hail City, Saudi Arabia, and Laboratory of Metrology and Energy systems, National Engineering School of Monastir, University of Monastir, Tunisia)
Mohammed A. Tashkandi (Department of Mechanical Engineering, Northern Border University, Arar, Saudi Arabia)
Emad Hasani Malekshah (Faculty of Engineering Computer and Mathematical Sciences, University of Adelaide, Adelaide, Australia, Department of Mechanical Engineering, Imam Hossein University, Tehran, Iran (the Islamic Republic of))
Ali J. Chamkha (Department of Mechanical Engineering, Prince Mohammad Bin Fahd University, Al-Khobar, Saudi Arabia, and RAK Research and Innovation Center, American University of Ras Al Khaimah, Ras Al Khaimah, United Arab Emirates)
Mohamad Naceur Borjini (Laboratory of Metrology and Energy systems, National Engineering School of Monastir, University of Monastir, Tunisia)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Article publication date: 26 October 2018

Issue publication date: 17 October 2019

136

Abstract

Purpose

The purpose of this paper is to investigate the coupled effect of magnetic field and radiation on convective heat transfer of low electrically conductive dielectric oxide melt.

Design/methodology/approach

The 3D Navier–Stokes equations are formulated using the vector potential-vorticity formulation and solved using the finite volume method (FVM). The radiative heat transfer equation is discretized using the FTnFVM method. A code was written using FORTRAN language.

Findings

The obtained numerical results are focused on the effect of the different parameters on the heat transfer and the flow structure with a special interest on the 3D transvers flow. It is found that the flow is developing in inner spirals and the magnetic field intensifies this 3D character. The radiation acts mainly at the core of the enclosure and causes the apparition of the merging phenomenon near the front and back walls.

Originality/value

The effect of magnetic field on convective heat transfer of highly electrically conductive fluids has been intensively studied. Reciprocally, the case of a fluid with low electrical conductivity is not so much investigated, especially when it is coupled with the effect of radiation. These two effects are studied in this paper for the case of a low-conductive LiNbO3 oxide melt.

Keywords

Acknowledgements

Second and sixth authors would like to thank the Tunisian Higher Education Ministry for the financial support to the Laboratory of Metrology and Energy systems.

Citation

Al-Rashed, A.A.A.A., Kolsi, L., Tashkandi, M.A., Hasani Malekshah, E., Chamkha, A.J. and Borjini, M.N. (2019), "Three-dimensional combined radiation-magnetoconvection of low electrically conductive dielectric oxide melt", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 29 No. 10, pp. 3611-3637. https://doi.org/10.1108/HFF-06-2018-0263

Publisher

:

Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited

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