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Numerical Study of Electroconvection in a Dielectric Layer Between Two Cofocal Elliptical Cylinders Subjected to Unipolar Injection

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Journal of Engineering Physics and Thermophysics Aims and scope

The problem of electroconvection in an annular space between two elliptical concentric cylinders filled with a dielectric liquid and subjected to internal unipolar injection is considered. A finite volume method is used to solve the governing equations, including the Navier–Stokes ones and a simplified set of the Maxwell equations. For the first time the whole set of these coupled equations is solved, using the elliptical-cylindrical coordinates. We first validate numerical simulation in this field by comparing the results obtained with those available in the literature. The numerical solution of the electroconvection problem is then followed by a detailed analysis of the flow structure and electric charge distribution. It is shown that the multicellular convective pattern is observed. It is noticed that unipolar charge injection from the internal electrode significantly changes the topology of the fluid flow. Finally, the influence of various system parameters, such as the injection level and electric Rayleigh number, is also investigated.

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Authors and Affiliations

  1. Unité de recherche de métrologie et des systèmes énergétiques, Ecole Nationale d’Ingénieurs, 5012, Monastir, Tunisie

    M. I. Elkhazen, W. Hassen, R. Gannoun & M. N. Borjini

  2. Department of Mechanical Engineering, College of Engineering, University of Babylon, Babylon City, Hilla, Republic of Iraq

    A. K. Hussein

Authors
  1. M. I. Elkhazen
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  2. W. Hassen
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  3. R. Gannoun
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  4. A. K. Hussein
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  5. M. N. Borjini
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Corresponding author

Correspondence to M. I. Elkhazen.

Additional information

Published in Inzhenerno-Fizicheskii Zhurnal, Vol. 92, No. 5, pp. 2358–2369, September–October, 2019.

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Elkhazen, M.I., Hassen, W., Gannoun, R. et al. Numerical Study of Electroconvection in a Dielectric Layer Between Two Cofocal Elliptical Cylinders Subjected to Unipolar Injection. J Eng Phys Thermophy 92, 1318–1329 (2019). https://doi.org/10.1007/s10891-019-02047-w

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  • DOI: https://doi.org/10.1007/s10891-019-02047-w

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