Recent Patents on Nanotechnology

Eduardo Ruiz- Hitzky  
Department of New Architectures in Materials Chemistry
Materials Science Institute of Madrid
Madrid
Spain

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Recent Advances in Thermal Conductivity of Nanofluids

Author(s): Sanjeeva Witharana, Jinendrika Anushi Weliwita, Haisheng Chen and Liang Wang

Affiliation: Institute of Particle Science and Engineering, University of Leeds, Leeds LS2 9JT, UK.

Keywords: Aggregation, brownian motion, enhancement, nanofluids, thermal conductivity.

Abstract:

This paper presents the most recent review of research articles and patents on thermal conductivity on nanofluids. Larger portion of literature accounts for experimental investigations, which is a sign of the preference for hands-on work by experimentalists. Metallic, non-metallic as well as ceramic nanoparticles of different sizes and shapes were suspended in common heat transfer liquids and their thermal conductivities were measured. In contrast to previous belief, it has now been proven that when the nanoparticle concentration is kept low the degree of enhancement falls reasonably within the boundaries predicted by the effective medium theories. There are strong evidences to suggest that the main mechanisms driving the thermal conductivity behavior are nanoparticle aggregation and the particle Brownian motion in suspension.

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Article Details

VOLUME: 7
ISSUE: 3
Page: [198 - 207]
Pages: 10
DOI: 10.2174/18722105113079990006