Nanofluid flow between parallel disks with thermal effects

Abstract

The thesis attempts to analyse some laminar incompressible flows of nanofluids between parallel plates under the influence of various factors. The thesis mainly focuses on two important phenomena involving flow between parallel disks, namely squeeze film and stretching sheet in non-porous/porous and flat/curved circular geometries. The flow behaviour and heat and mass transfer characteristics are investigated considering five different nanofluid models, namely single-phase nanofluid model, two-phase nanofluid model, Neuringer Rosenweig ferro-nanofluid model without and with Stokes couple stresses and Jenkins ferro-nanofluid model. Various analytical and numerical methods are employed to solve the five problems. Analytical methods used here include Energy Integral Method (EIM), Successive Approximation Method (SAM), perturbation method and asymptotic method whereas numerical methods include Runge-Kutta method and adaptive Simpson s rule. newlineA natural convection squeeze film flow of Copper and Alumina water nanofluids between parallel plates in a curved circular geometry is analysed using single-phase model and the problem is solved using EIM. The effects of inertia force, curvature, volume fraction of nanofluids and viscous dissipation on the squeeze film pressure, load carrying capacity and mean temperature are investigated for two different forms of the gapwidth between the plates. A mixed convection flow between a stretching disk and a porous disk in a rotating geometry with magnetohydrodynamics is also studied using a two-phase nanofluid model and the problem is solved using SAM. The influence of inertia, rotation, injection/suction, mixed convection, heat generation/absorption, Brownian motion and thermophoresis on the flow behaviour and the heat and mass transfer characteristics are examined. newline