Hybrid and Nanofluid Flows Due To Rotating Disks in a Porous Medium

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dc.contributor.author Saima Riasat, 01-283181-002
dc.date.accessioned 2022-12-22T09:24:50Z
dc.date.available 2022-12-22T09:24:50Z
dc.date.issued 2022
dc.identifier.uri http://hdl.handle.net/123456789/14521
dc.description Supervised by Dr. Muhammad Ramzan en_US
dc.description.abstract The problem relating to the fluid flow due to rotating disks is among the valued and active research subjects owing to its applicability in numerous engineering applications encompassing hard disks, jet motors, turbine systems, etc. Similarly, the topic of fluid flows between two rotating disks has also been the epicenter of discussion owing to its widespread industrial applications like gas turbines in the internal cooling-air systems, rotor-stator systems, and modeling of wheel space of disk turbine in contra rotation. Therefore, in this thesis research problems are all about studying hybrid nanofluid flow due to rotating disks by incorporating the induced and applied magnetic field with variable thermophysical features and surface catalyzed reaction. There is presently a lack of investigation that discusses various scenarios of the fluid flow over a single rotating disk, and amidst two rotating disks with numerous effects emphasizing the homogeneous-heterogeneous reaction in the presence of a catalyst and variable thermal conductivity and viscosity. The thermal conductivity and viscosity are assumed as the function of temperature to examine the flow behavior. In a delicate squeezed nanofluid thin-film flow problem, the role of the magnetic Reynolds number is highlighted. This is followed by a comprehensive performance-based comparison for a better heat transfer rate of hybrid nanofluid flows between two rotating disks considering Yamada-Ota and Xue models. Over a single rotating disk, three chapters are included in this thesis discussing various scenarios comprising entropy generation analysis, nanoparticles shape factor effects on heat transfer rate, and the inclusion of surface catalyzed reaction during the homogeneous-heterogeneous reaction activity. The objective of this thesis is to study a surface-catalyzed reaction that makes it possible to complete the chemical reaction impact in the minimum possible time. Second, the study of nanofluid flows considers temperature-dependent thermal conductivity and viscosity simultaneously. Thirdly, the shape of the nanoparticles affects the efficiency of the rate of heat transfer of the hybrid nanofluid flow. All the problems are solved by using bvp4c built-in MATLAB software. The key findings of our observations are that heat transfer performance shows that thermal efficiency is enhanced by using a hybrid nanofluid compared to a nanofluid. Surface drag force reduces at both the vi disks declines by increasing porosity and variable viscosity parameter. The main findings of our study leads to conclude that the blade shape of nanoparticles of Al2O3 is the best choice to contrive the hybrid nanofluid and fluctuating spinning disk inhibits the reaction rate. Significance of our study is that the rotating disk phenomenon applies to various physical situations and processes in which the disk behaves as a centrifugal fan according to the boundary constraints that we have taken. en_US
dc.language.iso en en_US
dc.publisher Computer Sciences en_US
dc.relation.ispartofseries PhD (Math);T-01872
dc.subject Rotating Disks en_US
dc.subject Hybrid Nanofluid en_US
dc.title Hybrid and Nanofluid Flows Due To Rotating Disks in a Porous Medium en_US
dc.type PhD Thesis en_US


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