الفهرس 
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Abstract
The aiM of this thesis is to investigate some problems of flow and heat
transfer of an electrically conducting micropolar fluids in porcms medium.
This thesis consists of four chapters:
Chapter one: In this chapter, we presented an introduction about the
following items which are closely related to subject of this thesis
(1) Governing equations of fluids.
(2) Theory of laminar boundary layers.
(3) Magnetohydrodynamics.
(4) Flow through porous media.
(5) Micropolar fluids.
(6) The shooting method.
(7) Survey on the previous works.
Chapter two: In this chapter, the problem of flow and heat transfer of
an electrically conducting micropolar fluid past a semi-infinite porous plate
embedded in a non- Darcian porous medium in the presence of magnetic
field is considered. The resulting coupled non-linear differential equations
are solved numerically. Velocity and temperature profiles as well as the local
Nusselt number and skin-friction coefficient are computed for vni ious values
of the permeability parameter, the inertia coefficient parameter, the mag
netic parameter, the suction/injection parameter and the Prandtl number.
The numerical calculations show the effects of the various parameters on
the system under consideration. from it we found that:
(1) The velocity and microrotation distributions increases with the increas
ing of the magnetic parameter for both cases of the suction and injection.
When the permeability parameter increases the velocity and microrota
tion distributions decreases for both cases of the suction and injection.
The velocity distribution increases with the increases of the inertia coef
ficient parameter; whereas the microrotation distribution decreases with
the increases of the inertia coefficient parameter.