NDLI: Impact of Thermodiffusion on Temperature Fields in Stationary Nanofluids

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Patricia, E. Gharagozloo Ken, E. Goodson John, K. Eaton
Copyright Year	2007
Abstract	The research community has reported a large variety of at times contradictory thermal conductivity enhancements for nanofluids. Some of the differences may result from thermodiffusion, which is the coupled transport of heat and nanoparticles in a temperature gradient. Thermodiffusion can influence the apparent conductivity observed in a given experimental setup. This work explores the potential impact of thermodiffusion on the inconsistencies of the previous results and on the observed temperature dependence of the thermal conductivity enhancement. The thermal conductivity variation with temperature is captured using infrared microscopy. The thermal conductivity distribution varies significantly over the temperature range 27 – 73°C. This work also explores the potential impact of aggregation, gravitational separation, and thermodiffusion on the time-evolution of the thermal conductivity. For 1 percent by volume aluminum oxide in deionized water, this work finds a thermal conductivity enhancement of between 1 and 15 percent depending on temperature and time, which corresponds to an enhancement factor of between 1 and 15. For 0.2 percent by volume carbon nanotubes in silicone oil, this work finds a thermal conductivity enhancement of 8 percent with no dependence on temperature, which corresponds to an enhancement factor of 40.
Sponsorship	Electronic and Photonic Packaging Division
Starting Page	993
Ending Page	998
Page Count	6
File Format	PDF
ISBN	0791842789
DOI	10.1115/IPACK2007-33293
e-ISBN	0791838013
Volume Number	ASME 2007 InterPACK Conference, Volume 2
Conference Proceedings	ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference
Language	English
Publisher Date	2007-07-08
Publisher Place	Vancouver, British Columbia, Canada
Access Restriction	Subscribed
Subject Keyword	Water Temperature Aluminum Nanofluids Carbon nanotubes Separation (technology) Temperature gradient Nanoparticles Heat Microscopy Temperature effects Thermal conductivity Silicones
Content Type	Text
Resource Type	Article

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