Experimental investigation on the thermal conductivity and viscosity of silver-deionized water nanofluid

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Author listGodson L., Raja B., Lal D.M., Wongwises S.

PublisherTaylor and Francis Group

Publication year2010

JournalExperimental Heat Transfer (0891-6152)

Volume number23

Issue number4

Start page317

End page332

Number of pages16

ISSN0891-6152

eISSN1521-0480

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-77957117613&doi=10.1080%2f08916150903564796&partnerID=40&md5=fa2e515c3d30e266ad871c80aa5784a4

LanguagesEnglish-Great Britain (EN-GB)


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Abstract

This article presents an experimental investigation where the thermal conductivity and viscosity of silver-deionized water nanofluid is measured and studied. The mixture consists of silver nanoparticles of 0.3, 0.6, and 0.9% of volume concentrations and studied for temperatures between 50ฐC and 90ฐC. The transient hot-wire apparatus and Cannon-Fenske viscometer are used to measure the thermal conductivity and kinematic viscosity of nanofluid, respectively. The thermal conductivity increases with the increase in temperature and particle concentrations. A minimum and maximum enhancement of 27% at 0.3 vol% and 80% at 0.9 vol% are observed at an average temperature of 70ฐC. The viscosity decreases with the increase in temperature and increases with the increase in particle concentrations. The effect of Brownian motion and thermophoresis on the thermo-physical properties is discussed. Thus, an experimental correlation for thermal conductivity and viscosity, which relates the volume concentration and temperature, is developed, and the proposed correlation is found to be in good agreement with the experimental results. Copyright ฉ Taylor & Francis Group, LLC.


Keywords

nanoparticle enhancement


Last updated on 2023-01-10 at 07:35