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Enhanced thermal conductivity and viscosity of copper nanoparticles in ethylene glycol nanofluid

J. Appl. Phys. 103, 074301 (2008); doi:10.1063/1.2902483

Published 2 April 2008

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J. Garg,1 B. Poudel,2 M. Chiesa,1 J. B. Gordon,1 J. J. Ma,1 J. B. Wang,4 Z. F. Ren,2 Y. T. Kang,5 H. Ohtani,3 J. Nanda,3 G. H. McKinley,1 and G. Chen1
1Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
2Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA
3Materials and Nanotechnology Department, Research and Advanced Engineering, Ford Motor Company, Dearborn, Michigan 48121, USA
4School of Environmental Science and Engineering, Huazhong University of Science and Technology, People's Republic of China
5School of Mechanical and Industrial Engineering, Kyung Hee University, South Korea
This study investigates the thermal conductivity and viscosity of copper nanoparticles in ethylene glycol. The nanofluid was prepared by synthesizing copper nanoparticles using a chemical reduction method, with water as the solvent, and then dispersing them in ethylene glycol using a sonicator. Volume loadings of up to 2% were prepared. The measured increase in thermal conductivity was twice the value predicted by the Maxwell effective medium theory. The increase in viscosity was about four times of that predicted by the Einstein law of viscosity. Analytical calculations suggest that this nanofluid would not be beneficial as a coolant in heat exchangers without changing the tube diameter. However, increasing the tube diameter to exploit the increased thermal conductivity of the nanofluid can lead to better thermal performance. ©2008 American Institute of Physics
History: Received 22 October 2007; accepted 22 January 2008; published 2 April 2008
Permalink: http://link.aip.org/link/?JAPIAU/103/074301/1
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KEYWORDS and PACS

Keywords
PACS
  • 81.07.Bc
    Nanocrystalline materials: fabrication and characterization
  • 72.15.Eb
    Electrical and thermal conduction in crystalline metals and alloys
  • 65.80.+n
    Thermal properties of small particles, nanocrystals, nanotubes
  • 66.20.-d
    Viscosity of liquids; diffusive momentum transport
  • YEAR: 2008

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PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
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