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EN
The paper deals with an unsteady two dimensional laminar slip flow of a viscous incompressible magnetomicropolar fluid past a semi infinite porous plate embedded in a porous medium. The flow is under the influence of a transverse magnetic field and heat source/sink. The free stream velocity follows an exponentially increasing or decreasing small perturbation law. The porous surface absorbs the fluid with time varying suction velocity. Expressions are obtained for velocity and temperature fields, mean angular velocity, skin friction and the Nusselt number.
EN
The present investigation is made to study the effects of Hall current and thermal radiation on an unsteady free convection flow in an incompressible, viscous fluid through a porous medium in a rotating system with a transversely applied magnetic field. A perturbation technique is used to obtain the solutions of velocity and temperature fields by separating real and imaginary parts. Expressions for the skin friction and Nusselt number are also derived. It is observed that an increase in the Hall parameter (m) decreases the primary skin friction ( p), but increases the secondary skin friction ( s) while an increase in the radiation parameter decreases the Nusselt number (Nu).
EN
A three dimensional unsteady convection flow of a viscous incompressible fluid through a highly porous medium with mass transfer effects bounded by an infinite inclined porous plate is analyzed. Assuming the free stream velocity to be uniform, approximate solutions are obtained and the effects of the following: the magnetic field (M), permeability parameter (K0), thermal Grashof number (Gr), mass Grashof number (Gc), Prandtl number (Pr), Schmidt number (Sc) and angle of inclination ( )on the velocity field, the temperature field, skin friction and the rate of heat transfer are discussed with the help of graphs. It is observed that an increase in K0 increases the skin friction but decreases the Nusselt number near the plate which increases as we move away from the plate whereas increase in M decreases the skin friction as well as the Nusselt number near the plate.
EN
A study of the temperature jump boundary condition is made on a three dimensional free convection flow between two vertical parallel porous flat plates. At the stationary plate there is a transverse sinusoidal injection and its corresponding removal is at the other plate. Using series expansion, the expressions for velocity and temperature distributions, the skin friction and rate of heat transfer are obtained. It is observed that an increase in the jump temperature increases the Nusselt number at the stationary plate.
EN
The present analysis is made to investigate the effects of Hall current on the free convection flow of an incompressible, viscous fluid through a porous medium in a rotating system past an infinite vertical porous plate in the presence of a heat sink and a transversely applied uniform magnetic field. Solutions of velocity and temperature fields are obtained using the perturbation technique. Expressions for the skin motion and heat transfer are also derived. It is found that the increase in the magnetic parameter (M) decreases both the primary skin friction [...] and secondary skin friction [...] while an increase in the Hall parameter (m) decreases [...] but increases [...].
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