Experimental investigation on the viscosity of hybrid nanofluids made of two kinds of nanoparticles mixed in engine oil

Yan Liu; Deshun Yin; Mingyuan Tian; Xichen Hu; Xuan Chen

Experimental investigation on the viscosity of hybrid nanofluids made of two kinds of nanoparticles mixed in engine oil

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Author(s): Yan Liu¹ ; Deshun Yin¹ ; Mingyuan Tian¹ ; Xichen Hu¹ ; Xuan Chen¹
- Affiliations: 1: College of Mechanics and Materials, Hohai University , No. 8 Fochengxi Road , Nanjing , Jiangsu , 211100 , People's Republic of China
Source: Volume 13, Issue 8, August 2018, p. 1197 – 1202
DOI: 10.1049/mnl.2018.0021 , Online ISSN 1750-0443

Received 12/01/2018, Accepted 25/04/2018, Revised 10/04/2018, Published 01/08/2018

To investigate the viscosity of hybrid nanofluids containing two kinds of nanoparticles, a series of experiments are conducted on TiO₂–Ag/engine oil, Al₂O₃–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 TiO₂–Ag/engine oil and Al₂O₃–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 Al₂O₃–Al₂O₃/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.

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Experimental investigation on the viscosity of hybrid nanofluids made of two kinds of nanoparticles mixed in engine oil

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