Abstract
The development of magnetic field effect on mixed convective flow in a horizontal channel with a bottom heated open enclosure has been numerically studied. The enclosure considered has rectangular horizontal lower surface and vertical side surfaces. The lower surface is at a uniform temperature T h while other sides of the cavity along with the channel walls are adiabatic. The governing two-dimensional flow equations have been solved by using Galarkin weighted residual finite element technique. The investigations are conducted for different values of Rayleigh number ( Ra), Reynolds number ( Re) and Hartmann number ( Ha). Various characteristics such as streamlines, isotherms and heat transfer rate in terms of the average Nusselt number ( Nu), the Drag force ( D) and average bulk temperature ( θ av ) are presented. The results indicate that the mentioned parameters strongly affect the flow phenomenon and temperature field inside the cavity whereas in the channel these effects are less significant.
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