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.
Skip Nav Destination
ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference
July 8–12, 2007
Vancouver, British Columbia, Canada
Conference Sponsors:
- Electronic and Photonic Packaging Division
ISBN:
0-7918-4278-9
PROCEEDINGS PAPER
Impact of Thermodiffusion on Temperature Fields in Stationary Nanofluids
Patricia E. Gharagozloo,
Patricia E. Gharagozloo
Stanford University, Stanford, CA
Search for other works by this author on:
Ken E. Goodson,
Ken E. Goodson
Stanford University, Stanford, CA
Search for other works by this author on:
John K. Eaton
John K. Eaton
Stanford University, Stanford, CA
Search for other works by this author on:
Patricia E. Gharagozloo
Stanford University, Stanford, CA
Ken E. Goodson
Stanford University, Stanford, CA
John K. Eaton
Stanford University, Stanford, CA
Paper No:
IPACK2007-33293, pp. 993-998; 6 pages
Published Online:
January 8, 2010
Citation
Gharagozloo, PE, Goodson, KE, & Eaton, JK. "Impact of Thermodiffusion on Temperature Fields in Stationary Nanofluids." Proceedings of the ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference. ASME 2007 InterPACK Conference, Volume 2. Vancouver, British Columbia, Canada. July 8–12, 2007. pp. 993-998. ASME. https://doi.org/10.1115/IPACK2007-33293
Download citation file:
8
Views
Related Proceedings Papers
Related Articles
Convective Performance of Nanofluids in a Laminar Thermally Developing Tube Flow
J. Heat Transfer (May,2009)
Comparative Study of Cooling Performance of Automobile Radiator Using Al 2 O 3 -Water and Carbon Nanotube-Water Nanofluid
J. Nanotechnol. Eng. Med (February,2014)
Related Chapters
Heat Transfer Characteristics of CNT-Heat Transfer Oil Nanofluid Flow Inside Helically Coiled Tubes under Uniform Wall Tempoerature Condition
International Conference on Computer and Electrical Engineering 4th (ICCEE 2011)
Simple Routes to Synthesize Carbon Nanotubes and Its Decoration by Palladium Nanoparticles
International Conference on Advanced Computer Theory and Engineering, 4th (ICACTE 2011)
An Approach for Optimizing Thermal Conductivity in Nanofluids
Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)