Magneto-thermocapillary-buoyancy convection in a square cavity with partially active vertical walls

• Main Authors: Lajnef Emtinene, Hassen Walid, Kolsi Lioua, Al-Rashed Abdullah A.A.A., Al-Sayegh Rajab, Borjini Mohamed Naceur
• Format: Article
• Language: English
• Published: VINCA Institute of Nuclear Sciences 2019-01-01
• Series: Thermal Science
• Subjects: marangoni effect; natural convection; partially active walls; finite volume method
• Online Access: http://www.doiserbia.nb.rs/img/doi/0354-9836/2019/0354-98361800142L.pdf
• ISSN: 0354-9836

Effect of magnetic field on combined surface tension and buoyancy convection in an enclosure with partially active vertical walls is investigated numerically. The active part of the left side wall is at a higher temperature than the active part of the right side wall. The bottom and the inactive parts of the side walls are adiabatic and capillary forces occur at the top free surface. The governing equations are discretized by the finite volume method. The results are obtained for Pr = 0.054, 0 ≤ Ha ≤ 100, 0 ≤ Ma ≤ 10000, and 2.104 ≤ Gr ≤ 2.106. The flow structure and temperature field were presented by streamlines and isotherms respectively. The surface tension effect of is manifested by increasing Marangoni number. The application of magnetic field was found to control the flow and to oppose the capillary effects.