The importance of suspension stability for the hot-wire measurements of thermal conductivity of colloidal suspensions

M. Chiesa, A. J. Simonsen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

Abstract

The development of advanced heat transfer fluids with enhanced thermal conductivity is essential to improve the effective heat transfer behavior of conventional coolants. Thermal conductivity enhancement has been reported for colloidal suspensions formulated with different nanoparticles. Reliable thermal conductivity measurement requires that the suspension is stable against sedimentation during the measurement since particle sedimentation may effect the experimental results. The present study proposes a criterion to ensure that thermal conductivity data is independent of the particle sedimentation. A measuring device based on the transient hot-wire method is designed to allow vertical and horizontal thermal conductivity data collection. Our investigation shows that the thermal conductivity measurements in the horizontal and vertical configurations are almost identical when the colloidal suspension is stable while they differ for unstable systems.

Original languageBritish English
Title of host publicationProceedings of the 16th Australasian Fluid Mechanics Conference, 16AFMC
Pages1154-1157
Number of pages4
StatePublished - 2007
Event16th Australasian Fluid Mechanics Conference, 16AFMC - Gold Coast, QLD, Australia
Duration: 3 Dec 20077 Dec 2007

Publication series

NameProceedings of the 16th Australasian Fluid Mechanics Conference, 16AFMC

Conference

Conference16th Australasian Fluid Mechanics Conference, 16AFMC
Country/TerritoryAustralia
CityGold Coast, QLD
Period3/12/077/12/07

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