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Theses

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2017 - 20202
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Subject: Mathematics × Author: Upreti, Himanshu × End date: 2024 × Type: Thesis ×
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    ThesisItemOpen Access
    A study of three dimensional flow in carbon nanotubes based nanofluid
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2020-12) Upreti, Himanshu; Manoj Kumar
    The present study is dedicated to analyze the flow, heat and mass transfer characteristics of nanofluid flow through different geometries under different conditions. The nanofluid flow through different solid objects, such as porous plate, parallel plate channel, bidirectional stretching surface, unidirectional stretching surface, etc., are commonly used in many fields of engineering and manufacturing process. The involvement of various physical factors, such as magnetic field, thermal radiation (linear and non-linear), suction/injection, porous medium, thermophoresis, Brownian motion, heat source/sink (uniform and nonuniform), dissipation, Joule heating, Biot number, volume fraction of nanoparticles and different base fluids in nanofluid flow have been discussed. The influences of these parameters are plotted and discussed to examine the variations in velocity profiles, temperature and concentration distributions. Moreover, the factors of engineering interests such as skin friction coefficient and Nusselt number are studied and discussed in detail. Response of above-stated factors on entropy generation number and Bejan number are presented graphically and discussed in detail. The introduction section consists of essential notions and definitions related to fluid mechanics. Applying similarity transformations, the principle equations are converted into non-dimensional set further using Runge-Kutta-Fehlberg method along with shooting technique to solve them with the various computing tools. For validation of present numerical codes, results are compared with previously published works. The work presented in this thesis can be useful to explore various expects and dimensions of nanofluid flow problems over other materials. The obtained results are promising and have significant impact in different field of applied sciences in mathematics and engineering.
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    ThesisItemOpen Access
    A study of flow and heat transfer of nanofluid over a flat plate
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-05) Upreti, Himanshu; Manoj Kumar
    Recent work deals with the problem pertinent to flow and heat transfer of nanofluid flow over a flat porous plate under the influence of suction/injection, heat generation/absorption and viscous-Ohmic dissipation. The influences of these parameters and other factor governing the flow have been analyzed and their impact on velocity and thermal boundary layer is reveal through graphs. Moreover, the non-dimensional quantities i.e., skin friction coefficient and heat transfer rate (Nusselt number) have also been computed and included in this study. The study presented in the thesis includes five chapters. The first chapter aims to fulfill the basic need of introducing the various concepts and foundation needed for fluid mechanics. Chapter two throw light on majority of passed research work related with the present work. Chapter three covers the mathematical formulation of the problem and its detailed description. A proper description of used methodology, together with the details of the numerical solution is also presented. Chapter four describes the result and discussion of the considered problem taken in chapter three. The work has been summarized in chapter five. In along with the finding of the study, the literature used in the course of the study has been referred under the section of literature cited. The related study may be helpful to applied scientific fields and different branch of engineering and applied mathematics.