Effects of Velocity and Thermal Slip Conditions with Radiation on Heat Transfer Flow of Ferrofluids

Maisha Islam Sejunti,Tania S Khaleque

doi:10.4236/jamp.2019.76092

Abstract

To analyze the thermal convection of ferrofluid along a flat plate is the persistence of this study. The two-dimensional laminar, steady, incompressible flow past a flat plate subject to convective surface boundary condition, slip velocity in the presence of radiation has been studied where the magnetic field is applied in the transverse direction to the plate. Two different kinds of magnetic nanoparticles, magnetite Fe3O4 and cobalt ferrite CoFe2O4 are amalgamated within the base fluids water and kerosene. The effects of various physical aspects such as magnetic field, volume fraction, radiation and slip conditions on the flow and heat transfer characteristics are presented graphically and discussed. The effect of various dimensionless parameters on the skin friction coefficient and heat transfer rate are also tabulated. To investigate this particular problem, numerical computations are done using the implicit finite difference method based Keller-Box Method.

Highlights

Owing to low thermal conductivity of the customary heat transfer fluids such as water, oil and ethylene glycol, the act of engineering apparatus such as heat exchangers and electronic devices face complications
In order to validate the accuracy of our numerical procedure, the skin friction coefficient is computed for pure fluid, magnetite and cobalt ferrite for specific values of velocity slip, magnetic parameters (Table 2) and the heat transfer rate
The present study investigates the flow and heat transfer of ferrofluids over a flat plate with slip conditions and radiation using the Keller-Box method

Summary

Introduction

Owing to low thermal conductivity of the customary heat transfer fluids such as water, oil and ethylene glycol, the act of engineering apparatus such as heat exchangers and electronic devices face complications. Among various kinds of explores on nanofluids, some of the studies have been absorbed on the nanofluids prepared by diffusing magnetic nanoparticles in a transporter liquid Magnetohydrodynamic (MHD) flow and heat transfer from fluids along flat plates have many engineering submissions in different industries Most of the former studies explore MHD convection heat transfer from surfaces under no slip condition [10] [11] [12] [13] [14]. The MHD boundary layer flow and heat transfer of ferrofluids along a flat plate or an oscillatory infinite sheet with various slip conditions have been studied by different authors [19]-[24]. No attempts so far have been made to analyze heat transfer flow of ferrofluids along a flat plate with velocity and thermal slip conditions with radiation

Governing Equations

Numerical Keller Box Method

Newton’s Method

Results and Discussions

Conclusions