Magnetic field effects on the flow patterns and the entropy generation of natural convection in square cavity

Magherbi, Mourad and Atef El Jery, Atef and Ben Brahim, Ammar (2009) Magnetic field effects on the flow patterns and the entropy generation of natural convection in square cavity. Journal of Heat and Mass Transfer, 3 (2). pp. 147-166. ISSN 0973-5763

[img]
Preview
PDF
JP Journal ofHeat and Mass Transfer Volume 3_ Number 2_2009_ Pages 147-166.PDF

Download (7MB) | Preview
[img] HTML
4287.htm - Published Version

Download (53kB)
Official URL: http://www.pphmj.com/journals/jphmt.htm

Abstract

This paper investigates the effect of an imposed magnetic field on the flow patterns, and the entropy generation in a square cavity. A control volume finite element method is used to solve the conservation equations at Prandtl number of 0.71. The effects of Grashof number, Hartmann number and inclination angle of the magnetic field are investigated. The study covers the range of the Hartmann number from 0 to 50, the magnetic field inclination angle from 0° to 90° with Grashof number ranging between 10^3 and 10^5. The effects of Hartmann number and the magnetic field inclination angle are presented graphically in terms of isotherm and streamline plots. The effect of the magnetic field is found to suppress the convection currents and heat transfer inside the cavity. This effect is significant for high Grashof numbers. Results show that the Nusselt number is clearly affected by the magnetic field. The effect of the Hartmann number on entropy generation was investigated in steady-unsteady state of natural convection. It was found that entropy generation in the steady state decreases when Hartmann number increases. Additionally, the oscillatory behaviour of the entropy generation at the onset of natural convection can be suppressed at critical Hartmann number.

Item Type: Article
Subjects: Chemical Engineering
Divisions: College Of Engineering > Chemical Engineering
Depositing User: Dr. Atef EL JERY
Date Deposited: 22 Oct 2017 16:46
Last Modified: 22 Oct 2017 16:46
URI: http://eprints.kku.edu.sa/id/eprint/1105

Actions (login required)

View Item View Item