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Numerical Study of the Effective Thermal Conductivity of Nanofluids

[+] Author Affiliations
Ratnesh K. Shukla, Vijay K. Dhir

University of California at Los Angeles, Los Angeles, CA

Paper No. HT2005-72577, pp. 449-457; 9 pages
doi:10.1115/HT2005-72577
From:
  • ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems
  • Heat Transfer: Volume 1
  • San Francisco, California, USA, July 17–22, 2005
  • Conference Sponsors: Heat Transfer Division and Electronic and Photonic Packaging Division
  • ISBN: 0-7918-4731-4 | eISBN: 0-7918-3762-9
  • Copyright © 2005 by ASME

abstract

Nanofluids, that is liquids containing nanometer sized metallic or non-metallic solid nanoparticles show an increase in thermal conductivity compared to that of the base liquid. In this paper we present numerical results obtained from Molecular Dynamics Simulations of a solid-liquid system comprising of Lennard-Jones atoms used to study the liquid layering on solid nanoparticles. It is found that close to the solid surface the liquid atoms form ordered layers which display higher thermal conductivity compared to the bulk liquid. We also present a model for thermal conductivity of nanofluids based on the theory of Brownian motion of a free particle and show that the thermal conductivity of the nanofluid predicted from the model agrees qualitatively with the experimental observations.

Copyright © 2005 by ASME

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