الفهرس 
Chapter I : IntroductionOnly 14 pages are availabe for public view
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Abstract
In recent years, the study of flow and heat transfer of micropolar fluids has considerable attention of several researches in view of its important applications in several technological processes, such as cooling of nuclear reactors during emergency shutdown, the extrusion of a polymer sheet, food stuff, cooling of electronic devices, enhanced oil recovery, hot rolling, continuous casting and glass fiber production. Therefore, the aim of this thesis is to investigate some problems related to boundary layer and thin liquid film of micropolar fluids over a surface under different situations. The effects of various physical parameters such as, the magnetic parameter, heat generation(absorption) parameter, slip parameter, suction (injection) parameter, Eckert number, Prandtl number, buoyancy parameter, material parameter and thermal radiation parameter on the flow and heat transfer have been illustrated and discussed.
Applications of these problems can be found in polymer processing technology. For
example, in the extrusion of polymer sheet from a die, the sheet is sometimes stretched.
During this process, the properties of the final product depend considerably on the kinematics
of stretching and the heat transfer rates during the fabrication process. The
kinematics and thermal driving conditions of the real cases have been modelled in most
processes by different power-law variations of the stretching velocity. By drawing such
sheet in an electrically conducting fluid subjected to a magnetic field, the rate of cooling
can be controlled and the final product can be obtained with desired characteristics. Also,
the combined effect of magnetic field and heat generation are important in many applications
such as nuclear reactors, electronic chips, and semiconductor wafers. However,
polymer melts often exhibit macroscopic wall slip. The fluids that exhibit the boundary
slip have important technological applications such as in the polishing of the artificial
heart valves, polymer processing and internal cavities. We know that the radiation effect
is important under many non-isothermal situations. If the entire system involving the
polymer extrusion process is placed in thermally controlled environment, then radiation
could become important. The knowledge of radiation heat transfer in the system can
perhaps lead to a desired product with a sought characteristic. Moreover, the flow and
heat transfer inside thin films have attracted the interest of many researchers due to their
several applications in engineering such as wire and fiber coating, reactor fluidization,
polymer processing, food stuff processing, transpiration cooling, gaseous diffusion, heat
pipes and fluidic cells of many chemical and biological detection systems.