Open AccessExperimental investigation on the viscosity of hybrid nanofluids made of two kinds of nanoparticles mixed in engine oil
Author(s) -
Liu Yan,
Yin Deshun,
Tian Mingyuan,
Hu Xichen,
Chen Xuan
Publication year - 2018
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2018.0021
Subject(s) - nanofluid , viscosity , materials science , shear thinning , shear rate , volume fraction , volume (thermodynamics) , nanoparticle , chemical engineering , composite material , thermodynamics , nanotechnology , engineering , physics
To investigate the viscosity of hybrid nanofluids containing two kinds of nanoparticles, a series of experiments are conducted on TiO 2 –Ag/engine oil, Al 2 O 3 –Ag/engine oil (a mixture of the volume ratio of 50:50) nanofluids under different shear rates and volume fractions. The results show that the viscosity decreases with increasing shear rate, which suggests TiO 2 –Ag/engine oil and Al 2 O 3 –Ag/engine oil hybrid nanofluids are both shear thinning fluids, whilst the viscosity of all samples enhances with the increase of volume fraction. Moreover, an interesting result is observed that the hybrid nanofluids have a lower viscosity than single particle nanofluids. Also, through the validating experiment based on Al 2 O 3 –Al 2 O 3 /engine oil with different diameters, it shows that different materials with unlike morphologies mixture are more likely to reduce the viscosity than dissimilar nanoparticles mixture of just one material.