Heat and Mass Transfer Analysis of Nanofluid Flow Based on Cu, Al2O3, and TiO2 over a Moving Rotating Plate and Impact of Various Nanoparticle Shapes

W Abbas,M M Magdy

doi:10.1155/2020/9606382

Abstract

The study of rotating nanofluid flows has a vital role in several applications such as in food processing, rotating machinery, cooling systems, and chemical fluid. The aims of the present work are to improve the thermophysical properties of convective flow and heat transfer for unsteady nanofluid past a moving rotating plate in the presence of ohmic, viscous dissipations, Brownian, and thermophoresis diffusion. The system is strained under the effect of strong magnetic field, and then the Hall current is considered. For this investigation, three different types of the nanoparticles Cu (copper), Al2O3 (aluminium oxide), and TiO2 (titanium dioxide) with various shapes (spherical, cylindrical, and brick) are considered, and water is used as a base nanofluid. The system governing equations are solved semianalytically using homotopy perturbation technique. In order to validate the present work, different comparisons are made under some special cases with previously published results and found an excellent agreement. It is observed that the shape of nanoparticles plays a substantial role to significantly determine the flow behaviour. Also, it can be found that the use of the cylindrical nanoparticle shape has better improvement for heat transfer rate compared with the other nanoparticle shapes.

Highlights

In recent years, investigation of nanofluid flow has gained considerable interest by the researchers owing to increase in the implementations in different fields of technology, science, biomechanics, chemical, and nuclear industries
Hayat et al [1] investigated the flow with heat and mass transfer characteristics in magnetohydrodynamic (MHD) squeezing flow between two surfaces. e effect of Joule heating and Hall current on nanofluid flow along a vertical cone with heat and mass transfer was investigated by Abbas and Sayed [6]
Erefore, the objective of the present study is to investigate the effects of the nanoparticle shape, Brownian, and thermophoresis diffusion on the motion of MHD unsteady nanofluid flow through past a moving rotating plate in the presence of ohmic, viscous dissipations, and thermal radiation. ree different types of the nanoparticles are considered. ese types are copper, aluminium oxide, and titanium dioxide with various shapes, and water is used as a base nanofluid. e problem is formulated and solved semianalytical using homotopy perturbation technique

Summary

Introduction

Investigation of nanofluid flow has gained considerable interest by the researchers owing to increase in the implementations in different fields of technology, science, biomechanics, chemical, and nuclear industries. Is term was first introduced by Choi [2]; he added small nanoparticles in a base fluid to increase the thermal conductivity. Eastmann et al [3] discussed the thermal conductivity in ethylene glycol nanofluid-based copper nanoparticles. Chamkha et al [4] studied the thermal radiation effect on nanofluid boundary layer flow past a vertical cone. Timedependent viscosity effect on free convection heat transfer of magnetohydrodynamic nanofluid was investigated by Sheikholeslami et al [5]. E effect of Joule heating and Hall current on nanofluid flow along a vertical cone with heat and mass transfer was investigated by Abbas and Sayed [6]. Mahanthesh et al [7] analyzed the effect of the novel exponential space-dependent heat source on magnetohydrodynamic nanofluid flow past a stretchable rotating disk with cross-diffusion and the convective condition. Many researchers have been engaged in recent developments on nanofluids [8,9,10,11]

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