Date of Award

2010

Degree Type

Thesis

Department

Mechanical Engineering

First Advisor

Gorla, Rama Subba Reddy

Subject Headings

Nanofluids, Heat -- Convection, Natural, Porous materials, Nanofluid, Natural Convection, Porous Medium

Abstract

A boundary layer analysis is presented for the natural convection heat and mass transfer flow past along two different geometries i.e., a vertical cone and an isothermal sphere in a Non-Darcy porous medium saturated with a nanofluid. A co-ordinate transformation is used to transform the governing equations into non-dimensional non-similar boundary layer equations. These equations are then solved numerically using implicit finite difference method (Keller-box method). Numerical solutions for heat transfer rate, mass transfer rate and friction factor have been presented for parametric variations of the buoyancy ratio parameter N-r, Brownian motion parameter Nb, thermophoresis parameter Nt and Lewis number Le. The dependency of the local friction factor, surface heat transfer rate (Nusselt number), and mass transfer rate (Sherwood number) on these parameters has been discussed

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