Measurement of the thermal conductivity of titania and alumina nanofluids
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Publication Details
Author list: Yiamsawasd T., Dalkilic A.S., Wongwises S.
Publisher: Elsevier
Publication year: 2012
Journal: Thermochimica Acta (0040-6031)
Volume number: 545
Start page: 48
End page: 56
Number of pages: 9
ISSN: 0040-6031
eISSN: 1872-762X
Languages: English-Great Britain (EN-GB)
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Abstract
This article reports the thermal conductivity of nanofluids experimentally. TiO 2 and Al 2O 3 nanoparticles were suspended in base fluids (water and 20/80 by mass of an ethylene glycol-water mixture) with concentration level of 0-8 vol.%, at a temperature of 15-65ฐC. The measurement was done by the transient hot-wire method. The results showed that thermal conductivity of nanofluids increased more with respect to the base fluid and increased with increasing concentration and temperature. When compared with predictions from existing models, thermal conductivity ratio could not be predicted by the models in terms of both concentration and temperature. Finally, a useful correlation for predicting thermal conductivity of Al 2O 3 and TiO 2 nanofluids was presented. ฉ 2012 Elsevier B.V. All rights reserved.
Keywords
Nanofluids, Thermal Conductivity, Transient hot-wire method
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