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.
Keywords: Aggregation, brownian motion, enhancement, nanofluids, thermal conductivity.
Recent Patents on Nanotechnology
Title:Recent Advances in Thermal Conductivity of Nanofluids
Volume: 7 Issue: 3
Author(s): Sanjeeva Witharana, Jinendrika Anushi Weliwita, Haisheng Chen and Liang Wang
Affiliation:
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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Cite this article as:
Witharana Sanjeeva, Weliwita Anushi Jinendrika, Chen Haisheng and Wang Liang, Recent Advances in Thermal Conductivity of Nanofluids, Recent Patents on Nanotechnology 2013; 7 (3) . https://dx.doi.org/10.2174/18722105113079990006
DOI https://dx.doi.org/10.2174/18722105113079990006 |
Print ISSN 1872-2105 |
Publisher Name Bentham Science Publisher |
Online ISSN 2212-4020 |
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