Free Convection Boundary Layer Flow over a Horizontal Circular Cylinder in Al2O3-Ag/Water Hybrid Nanofluid with Viscous Dissipation

Muhammad Khairul Anuar Mohamed,Huei Ruey Ong,Mohd Zuki Salleh,Fadhilah Che Jamil

doi:10.11113/mjfas.v17n1.1964

Muhammad Khairul Anuar Mohamed, Huei Ruey Ong + Show 2 more

Open Access

https://doi.org/10.11113/mjfas.v17n1.1964

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Abstract

In this paper, the mathematical model of free convection boundary layer flow of horizontal circular cylinder immersed in Ag/Water nanofluid and Al2O3-Ag/Water hybrid nanofluid are considered. The governing non-linear partial differential equations are first transformed to a more convenient way before being solved numerically using the Keller-box method. The numerical values for the reduced Nusselt number and the reduced skin friction coefficient are obtained and illustrated graphically as well as temperature profiles and velocity profiles. Effects of the Prandtl number, Eckert number and nanoparticle volume fraction are analyzed and discussed. It is found that the Nusselt number for Al2O3-Ag/Water hybrid nanofluid is comparable with Ag/Water nanofluid with a reduction in skin friction coefficient. The preliminary results reports here are important as a reference in exploring the potential of hybrid nanofluid to reduce the production cost compared to the used of metal nanofluid.

Highlights

Recent eras of technology saw the widely used of nanofluid as a cooling or heat transfer medium in many industrial, automotive and electrical devices
Better performance in thermal conductivity, viscosity, thermal diffusivity and convective heat transfer as well as no clogging are the reason for the employment of nanofluid compared to based fluid (Wong and De Leon, 2010)
It is known that the metal nanoparticles like copper Cu and silver Ag performed better in heat transfer capabilities compared to oxide nanoparticles, thanks to the nanoparticle’s higher thermal conductivity

Summary

Introduction

Recent eras of technology saw the widely used of nanofluid as a cooling or heat transfer medium in many industrial, automotive and electrical devices. Better performance in thermal conductivity, viscosity, thermal diffusivity and convective heat transfer as well as no clogging are the reason for the employment of nanofluid compared to based fluid (Wong and De Leon, 2010). It is known that the metal nanoparticles like copper Cu and silver Ag performed better in heat transfer capabilities compared to oxide nanoparticles, thanks to the nanoparticle’s higher thermal conductivity. This type of nanomaterial is expensive and not economical in mass production (Devi and Devi, 2017).

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