A Study on Impacts of Surface Geometries on Boundary Layer Flows of Nanofluids

Abstract

This thesis focuses on quotThe impact of surface geometries on boundary layer flows of nanofluidsquot. The efficient performance of heat transfer fluid in terms of thermal conductivity plays a significant role in thermal engineering activities. A nanofluid is the suspension of ultra fine particles in a base fluid, which tremendously enhances the heat transfer characteristics of the original fluid. These fluids have very high thermal conductivity and the competence to meet the challenges, such as stability, sedimentation, erosion and additional pressure drop. In recent years, the study of convective heat transfer in nanofluids has attracted enormous interest from researchers, due to its potential for a high rate of heat transfer enhancement properties. Due to significance of nanofluids the present work mainly dealt with nanofluid flows. Nanofluids have novel properties that make them potentially useful in many applications in heat transfer, including microelectronics, fuel cells, pharmaceutical processes and hybrid-powered engines. The study of nanofluids in the presence of magnetic fields has important applications in physics, chemistry, and engineering. Since the magnetite nanoparticles can be controlled by magnetic field, the magnetic nanofluid is regarded as a controllable nanofluid. Radiation heat transfer is concerned with the exchange of thermal radiation energy between two or more bodies. This mode of heat transfer is associated with the emission of energy in the form of electromagnetic waves and is not dependent on the presence of a transmitting medium. In the majority of engineering systems, radiation effects are not significant, the principal exception being in flames resulting from reacting mixtures. Radiative heat transfer in which heat is transmitted from one point to another without heating the intervening medium has been found very important in the design of reliable equipment, nuclear plants, gas turbines, and various propulsion devices for aircraft, missiles, satellites, and space vehicles. Dissipation