Recent Advances in Thermal Conductivity of Nanofluids
Sanjeeva Witharana, Jinendrika Anushi Weliwita, Haisheng Chen and Liang Wang
Affiliation: Institute of Particle Science and Engineering, University of Leeds, Leeds LS2 9JT, UK.
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
Keywords: Aggregation, brownian motion, enhancement, nanofluids, thermal conductivity.
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