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Title: Numerical Study of Some Flows Through Porous Media
Authors: Ahmad, Sohail
Keywords: Physical Sciences
Issue Date: 2022
Publisher: Bahauddin Zakariya University Multan
Abstract: The flows involving different fluids within permeable or porous medium have practical employments in several areas of applied sciences and engineering. A fluid saturated porous media is a subject of most common interest which exists as a separate field of study such as Poromechanics. An effort is taken out, in this dissertation, to numerically investigate some fluid flows through porous media. Innovative types of fluids such as micropolar fluid, usual nanofluids and hybrid nanofluids are used to interpret their flow characteristics through porous media. Flows are taken over different geometries such as nonlinearly extending surface, channel and linearly stretching sheet. The flows also involve mass and heat transfer attributes along with some other prominent effects. The novel approach in our work is to offer unique simulation analysis of (1) micropolar fluid flow through porous media (2) flow of gyrotactic microorganisms and nanoparticles through porous media (3) flow of hybrid nanoparticles such as aluminum oxide and copper through porous media. The governing partial differential equations (PDEs) regarding the flow models are first transmuted in ordinary ones utilizing the appropriate similarity transformations, and then central differences are used to further reduce the dimensionless coupled system of equations in an algebraic system. Afterward, approximate solutions are determined via MATLAB software by employing the persuasive techniques like Quasi-linearization (QL) and Successive over Relaxation (SOR). These methods are much reliable to find the numerical solutions and provide a quick convergence of the complex dynamical problems. The concentration, velocity and temperature are checked out against various prime parameters. The mass and heat transmission rates as well as surface drags are also analyzed for the preeminent parameters. Figures and tables are used in order to interpret and discuss the novel results. Comparisons, for each model problem of this thesis, are provided to appraise the efficiency of codes. The results are assessed to be in a good correlation with the existing ones. It can be deduced from the consequences of these investigations that the use of porous media makes the flow stable and consistent. Moreover, porous media maintains the temperature and heat transport rate in many systems.
Gov't Doc #: 25274
Appears in Collections:PhD Thesis of All Public / Private Sector Universities / DAIs.

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