Analysis of the electro-thermo-convection induced by a strong unipolar injection between two concentric or eccentric cylinders. (3rd April 2017)

• Record Type: Journal Article
• Authors: Hassen, Walid; Oztop, Hakan F.; Kolsi, Lioua; Borjini, Mohamed Naceur; Abu-Hamdeh, Nidal
• Is Part Of: Numerical heat transfer. Volume 71:Number 7(2017)
• Page Start: 789
• Page End: 804
• Publication Date: 2017-04-03
• Subjects: Heat -- Transmission -- Measurement -- Periodicals; Mass transfer -- Measurement -- Periodicals; Numerical analysis -- Periodicals; 621.4022
• DOI: 10.1080/10407782.2017.1308725
• Languages: English
• ISSNs: 1040-7782

Abstract

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 0.1 ≤ Г ≤ 0.9, injection strength in the range of 1 ≤ C ≤ 20, mobility number changes in the range 4 ≤ M ≤ 150, electric Rayleigh number in the range of 100 ≤ T ≤ 800, and Rayleigh number changes in the range of 5000 ≤ Ra ≤ 25000. 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.