Walid Hassen

Analysis of the electro-thermo-convection induced by a strong unipolar injection between two concentric or eccentric cylinders

ABSTRACT A computational study has been performed to see the effects of electro-thermo-convection induced via a strong unipolar injection between two concentric or eccentric cylinders using the finite volume method. The parameters are taken in the range of radius ratio 0.1u2009≤u2009Гu2009≤u20090.9, injection strength in the range of 1u2009≤u2009Cu2009≤u200920, mobility number changes in the range 4u2009≤u2009Mu2009≤u2009150, electric Rayleigh number in the range of 100u2009≤u2009Tu2009≤u2009800, and Rayleigh number changes in the range of 5000u2009≤u2009Rau2009≤u200925000. It is observed that the most important effective parameter is radius ratio, which affects both heat and fluid flow. Moreover, electrical Rayleigh numbers suppress the thermo-convection and in any case higher transfer is observed due to electric charge injection.

Numerical simulation of 3D natural convection and entropy generation in a cubic cavity equipped with an adiabatic baffle

1 Unité de Recherche de Métrologie et des Systèmes Energétique, Ecole Nationale d’Ingénieurs, University of Monastir, Monastir 5000, Tunisia 2 College of Engineering, Mechanical Engineering Department, Haïl University, Haïl 2240, Saudi Arabia 3 Department of Automotive and Marine Engineering Technology, College of Technological Studies, the Public Authority for Applied Education and Training, Kuwait