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Thermal conductivity measurement of methanol-based nanofluids with Al 2O 3 and SiO 2 nanoparticles

Authors
Pang, C.Jung, J.-Y.Lee, J.W.Kang, Y.T.
Issue Date
2012
Keywords
Clustering; Methanol-based nanofluids; Particle size; Thermal conductivity; Zeta potential
Citation
International Journal of Heat and Mass Transfer, v.55, no.21-22, pp 5597 - 5602
Pages
6
Journal Title
International Journal of Heat and Mass Transfer
Volume
55
Number
21-22
Start Page
5597
End Page
5602
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/1051
DOI
10.1016/j.ijheatmasstransfer.2012.05.048
ISSN
0017-9310
1879-2189
Abstract
In this study, the methanol-based nanofluids with Al 2O 3 and SiO 2 nanoparticles are prepared by dispersing nanoparticles in pure methanol using an ultrasonic equipment. The main objective of this paper is to measure the thermal conductivity of the methanol-based nanofluids. We have also measured the zeta potential, particle size and Tyndall effect for the present nanofluids. The transient hot-wire method is applied for measuring the thermal conductivity of methanol-based nanofluids. The measurement uncertainty in repeatability is obtained as 1.95% for deionized (DI) water and 1.34% for pure methanol, respectively. The effective thermal conductivity of methanol-based nanofluids is measured at a temperature of 293.15 K. The results show that the thermal conductivity increases with an increase of the nanoparticle volume fraction, and the enhancement is observed to be 10.74% and 14.29% over the basefluid at the volume fraction of 0.5vol% for Al 2O 3 and SiO 2 nanoparticles, respectively. Clustering of nanoparticles is considered to be the main reason for the thermal conductivity enhancement. ? 2012 Elsevier Ltd. All rights reserved.
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해양공공디지털연구본부 (해사안전·환경연구센터)
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