Comparison of nanofluid heat transfer properties with theory using generalized property relations for EG-water mixture

Seshu Kumar Vandrangi,Sharma K.V,Prasad Reddy,Suhaimi Bin Hassan,H Sakidin,S.A Abdul Karim,D Ling Chuan Ching,N Sa'Ad,M.H Yusof

doi:10.1051/matecconf/201713103004

Abstract

A numerical analysis for the determination for turbulent characteristics of fluid flow and heat transfer have been developed by employing the eddy diffusivity equation of Van Driest. The properties of Silicon dioxide (SiO 2 ) nanofluid with spherical particles in base liquid ethylene glycol (EG) -water (W) mixture of 60:40 ratio is employed for a wide range of concentrations and bulk temperature. A good agreement of the numerical results with the experimental data for properties and heat transfer is observed. A comparison of Copper oxide (CuO), Aluminum dioxide (Al 2 O 3 ) and Silicon dioxide (SiO 2 ) nanofluids revealed that SiO 2 attain higher temperature gradients in comparison to CuO nanofluid at the same concentration and temperature.

Highlights

Studies using conventional heat transfer fluids such as water, ethylene glycol (EG) and engine oil are subjected to system alterations to meet the desired performance requirements
The experimental heat transfer coefficients of nanoparticles dispersed in base liquid EG-water mixture in 60:40 ratio by Vajjha and Das [11] is used to develop a regression equation resulting in Eq (1)
The base liquid and nanofluid properties, heat transfer coefficients are validated with the experimental data

Summary

Introduction

Studies using conventional heat transfer fluids such as water, ethylene glycol (EG) and engine oil are subjected to system alterations to meet the desired performance requirements. Experiments for the determination of nanofluid forced convection heat transfer coefficients in the turbulent range are undertaken with Al2O3 (45nm), CuO (29nm), and SiO2 (20, 50, 100nm) for a maximum concentration of 10.0% for temperature varying from 2090oC by Vajjha and Das [11] in base liquid EG-water mixture in 60:40 ratio. Kulkarni et al [10] undertook experiments to estimate the convective heat transfer and pressure loss of SiO2 (20, 50, 100nm) nanofluids dispersed in EG-water mixture for volume concentration in the range of 0-10% with temperatures varying between 20-90oC They have reported an enhancement of 16% in heat transfer coefficient at a concentration of 10.0% with 20nm particle size at Re = 10000.

Base fluid and nanofluid properties

Results and discussions

Conclusions