The schematic diagram and the mesh of the semiannulus enclosure used in the present CVFEM program are shown in
Fig. 6.31 [12]. The inner and outer walls are maintained at constant temperatures
Th and
Tc, respectively, while the two other walls are thermally insulated. Also, the boundary conditions of concentration are similar to temperature. It is also assumed that the uniform magnetic field (

) of constant magnitude
is applied, where
and
are unit vectors in the Cartesian ...