An experimental study on the effect of diameter on thermal conductivity and dynamic viscosity of Fe/water nanofluids
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Author list: Hemmat Esfe M., Saedodin S., Wongwises S., Toghraie D.
Publisher: Springer Verlag (Germany) / Akadémiai Kiadó
Publication year: 2015
Journal: Journal of Thermal Analysis and Calorimetry (1388-6150)
Volume number: 119
Issue number: 3
Start page: 1817
End page: 1824
Number of pages: 8
ISSN: 1388-6150
eISSN: 1588-2926
Languages: English-Great Britain (EN-GB)
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Abstract
The addition of nanoparticles to a base fluid is one of the significant issues to enhance heat transfer. In this study, different nanofluids were developed by mixing a water base fluid with magnetic nanoparticles. Thermophysical properties such as thermal conductivity and viscosity of the obtained nanofluid were investigated. The effect of different nominal diameters of nanoparticles and concentrations of nanoparticles on the thermal conductivity and viscosity of nanofluids have been examined. Three different diameters of magnetic nanoparticles (about 37 nm, 71 nm, and 98 nm) have been tested in this experimental investigation. Experimental results indicate that thermal conductivity increases as volume fraction increases, and thermal conductivity of the nanofluid increases with a decrease of nanoparticle's size. Moreover, the nanofluid dynamics viscosity ratio increases with an increase in particle concentration and nanoparticle's diameter. This paper identifies several important issues that should be considered in future work. ฉ 2014 Akad้miai Kiad๓, Budapest, Hungary.
Keywords
Diameter, Dynamic viscosity
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