Modeling and Numerical Analysis of Heat Transfer Phenomenon in Various Industrial Fluids

Abstract

The present thesis is devoted to develop new mathematical models for various types of fluids under different scenarios to provide significant benefits to industries and engineers. Keeping this in view, industrial fluids such as FENE-P fluids, di-hybrid nanofluids, tri-hybrid nanofluids, Casson fluids and phase change materials (paraffin wax, salt hydrates) have significant applications in chemical, pharmaceutical, electronics, food-processing, bio-medical industries. In this thesis, we have ad dressed above mentioned fluid flows over different configurations, like, flat plate, stretching sheet, rotating disks, jet impingement, under various conditions. All these configurations provide foun dational knowledge that is applied in a wide range of industries and research areas. In this regard, f low over flat plate helps in analyzing and designing aircraft wings, understanding the flow over stretching sheets is crucial for developing new fabrication techniques in nanofibers and nanofilms, and the flow dynamics over rotating and stretchable disks are crucial for designing and optimizing turbines and compressors in power plants and jet engines, the jet impinging technique is used to efficiently and instantly dissipate the heat to cool the sophisticated engineering devices, such as anti-icing of aircraft wings, micro-processor/controllers, heat exchanger, etc. Moreover, introduc ing porous media over the same configurations further helps distribute the flow more uniformly, reduce drag, and increase the heat transfer rate. Therefore, drawing inspiration from these factors, we have examined the flow dynamics and heat transfer of these industrial fluids by employing buoyancy effects, velocity slips, viscous dissipation effects, etc., over different domains. The as sociated phenomenon and physics behind them are discussed through velocity profiles, thermal profiles, streamlines, isotherm contours, Nusselt number and skin friction coefficient. This re search could pave the way for developing numerous engineering and industrial applications.