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Electro-thermo-convection in dielectric liquid subjected to partial unipolar injection between two eccentric cylinders

Mohamed Issam Elkhazen (Unité de Métrologie et des Systèmes Énergétiques, École Nationale d’Ingénieurs, University of Monastir, Monastir, Tunisia)
Walid Hassen (Unité de Métrologie et des Systèmes Énergétiques, École Nationale d’Ingénieurs, University of Monastir, Monastir, Tunisia)
Hakan F. Öztop (Department of Mechanical Engineering, Technology Faculty, Firat University, Elazig, Turkey)
Lioua Kolsi (College of Engineering, Mechanical Engineering Department, Haïl University, Haïl City, Saudi Arabia and Unité de Métrologie et des Systèmes Énergétiques, École Nationale d’Ingénieurs, Monastir, University of Monastir, Tunisia)
Abdullah A.A.A. Al-Rashed (Department of Automotive and Marine Engineering Technology, College of Technological Studies, The Public Authority for Applied Education and Training, Kuwait)
Mohamed Naceur Borjini (Unité de Métrologie et des Systèmes Énergétiques, École Nationale d’Ingénieurs, University of Monastir, Monastir, Tunisia)
Mohamed E. Ali (Department of Mechanical Engineering, College of Engineering, King Saud University, Riyadh, Saudi Arabia)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Article publication date: 22 November 2018

Issue publication date: 29 January 2019

184

Abstract

Purpose

The purpose of this work is to highlight the effects of partial unipolar injection on electro-thermo-convection (ETC) in dielectric liquid contained between two eccentric cylinders.

Design/methodology/approach

A finite volume method was used to solve governing equations. The study is performed for different parameters, such as radius ratio (0.2 ≤ Γ ≤ 0.6), dimensionless electric Rayleigh number (0 ≤ T ≤ 900), eccentricity (−0.4 ≤ e ≤ 0.4) and thermal Rayleigh number (10 ≤ Ra ≤ 5.105).

Findings

It is found that heat transfer increases with increase in dimensionless electric Rayleigh number and eccentricity ratio.

Originality/value

The originality of this work is to analyze the ETC in dielectric liquid subjected to partial unipolar injection between two eccentric cylinders

Keywords

Acknowledgements

The third and last authors extend their appreciation to the International Scientific Partnership Program ISPP at King Saud University for funding this research work through ISPP# 131. The authors also wish to express their thank to the very competent reviewers for the valuable comments and suggestions.

Citation

Elkhazen, M.I., Hassen, W., Öztop, H.F., Kolsi, L., Al-Rashed, A.A.A.A., Borjini, M.N. and Ali, M.E. (2019), "Electro-thermo-convection in dielectric liquid subjected to partial unipolar injection between two eccentric cylinders", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 29 No. 1, pp. 78-93. https://doi.org/10.1108/HFF-08-2017-0308

Publisher

:

Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited

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