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Nonlinear Stagnation Point Flows Induced by Riga Plate

Thesis Info

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Author

Aisha Anjum

Supervisor

Nazir Ahmad Mir

Program

PhD

Institute

Riphah International University

City

Islamabad

Province

Islamabad

Country

Pakistan

Thesis Completing Year

2019

Thesis Completion Status

Completed

Subject

Mathemaics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/12453/1/Aisha%20Anjum%20maths%202019%20riphah%20isb%20prr.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726763302

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This thesis focuses on the characteristics of two-dimensional and incompressible stagnation point flows of Newtonian/ non-Newtonian fluids induced by Riga plate. It is the combination of alternative magnets and electrodes and it is especially used for the flows of those fluids having weak electrical conductivity. Here, only orthogonal stagnation point flows are discussed comprehensively. Linear and nonlinear stretching of the plate are considered with constant and variable thickness respectively. Fourier’s law of heat conduction/Cattaneo-Christov heat flux model is implemented to uncover the features of heat transport. Heat generation/absorption and viscous dissipation are modeled with Cattaneo-Christov heat flux model for the first time. Further, melting heat transfer and convective boundary conditions are investigated mathematically for the first time with thermal stratification. Characteristics of Polystyrene-water and Polystyrene-kerosene oil nanofluids are studied also for the first time. Other physical phenomena such as, velocity slip, thermal slip, Darcy-Forchheimer porous medium, nonlinear mixed convection, thermal radiation and homogeneous-heterogeneous chemical reactions are encountered to analyze the fluid flows with heat and mass transfer. Viscous, second grade and Powell-Eyring fluids are used to study the stagnation point flow induced by Riga plate. The governing nonlinear partial differential equations are converted into nonlinear ordinary differential equations by implementing suitable transformations. Approximate solutions are computed through homotopic/numerical techniques. Graphical behaviors of velocity, temperature and concentration profiles are studied comprehensively corresponding to various physical parameters. Skin friction, Nusselt number and entropy generation parameter are illustrated and discussed through various physical parameters.
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