Magnetic Field Effect on Mixed Convection Heat Transfer in a Lid-Driven Rectangular Cavity
Keywords:
Cavity, finite volume method, lid-driven, magnetic field, mixed convectionAbstract
This study aims to analyze numerically the fluid flow and heat transfer in a two
dimensional (2D) rectangular cavity in the presence of magnetic field. The bottom
and top cavity walls are kept at Th and Tc respectively, where Th> Tc. Meanwhile, the
vertical walls are insulated. The top wall is moving at a constant speed in the positive
horizontal direction. The dimensionless governing equations are solved using the
finite volume method and the SIMPLE algorithm. The influence of Hartmann number
(Ha) (ranges from 0 to 60) on the thermal characteristics and fluid flow is analyzed.
The simulated streamlines and isotherm plots, as well as the variation of local Nusselt
numbers, are then presented. It is found that the Ha has a significant effect on the
fluid flow structure and temperature field. As Ha increases, the flow convection is
attenuated and therefore the heat transfer rate decreases.