ABSTRACT
Convection is the heat transfer mode associated with the bulk movement of a fluid or medium. It occurs when a fluid is in contact with a solid surface, and when there is a temperature difference between the surface and the fluid. The system approach is the most fundamental approach in which the conservation laws are applied directly to the thermodynamic system with boundaries that separate it from the surroundings. Scaling of fluid flow and convective heat transfer problems to suit small physical domains introduces effects, characteristic of the domain size. Convection in microchannels evolved as a prominent area of study in microscale heat transfer due to prospective applications in the thermal control of microelectronic devices and components. The term “micropolar fluids” describes a medium containing randomly dispersed rigid particles suspended in a viscous liquid. Liquid to vapor phase change and associated heat transfer in flow boiling offer an attractive option, especially in the thermal management of microelectronic devices.
