Experimental Study of Heat Transfer Characteristics of Al2O3 and CuO Nanofluids for Machining Application

Abstract

Abstract In thermal engineering applications, the nanofluids are used to enhance the heat transfer performance. Recently traditional cutting fluids are gradually being replaced by the nanofluid due to growing need of green manufacturing and environmental friendly process. This paper presents the experimental study of water based Al2O3 and CuO nanofluids at different volume % concentrations such as 0.05%, 0.15%, 0.3%, 0.5% and 1% for heat transfer application. The thermal conductivity and viscosity of nanofluids are considered together for heat transfer performance. The result shows that thermal conductivity ratio is enhanced by 19.74% and 36.21% for Al2O3 and CuO nanofluids at 1 vol. % concentration respectively. Similarly absolute viscosity ratio is increased by 29.77% and 48.71%. The better heat transfer fluid is obtained for machining application at optimal values 0.30 vol. % concentration of Al2O3 and 0.15 vol. %concentrations of CuO nanofluid for combined consideration of thermal conductivity and viscosity. It is also observed that after 0.50 vol. % concentration the viscosity of nanofluid increases largely which affects on thermal conductivity of nanofluid and gives the poor thermal performance. The performance of Nanofluid MQL process for machining performance is also reviewed.