Table of Contents
Physics Research International
Volume 2010 (2010), Article ID 681476, 5 pages
http://dx.doi.org/10.1155/2010/681476
Research Article

On Clustering Impurities by Liquid Density Fluctuations

Russian Research Center “Kurchatov Institute”, 1, Kurchatov Square, Moscow 123182, Moscow 123182, Russia

Received 29 September 2010; Accepted 25 November 2010

Academic Editor: Ravindra R. Pandey

Copyright © 2010 Alexander L. Shimkevich. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Recent developments in liquid technology have created a new class of fluids called “nanofluids” which are two-phase mixtures of a non-metal-liquid matrix and addon particles usually less than 100 nm in size. It is reputed that such liquids have a great potential for application. Indeed, many tests have shown that their thermal conductivity can be increased by almost 20% compared to that of the base fluids for a relatively low particle loading (of 1 up to 5% in volume). It is confirmed by experimental data and simulation results. In this study, the author considers an effect of impurity clustering by liquid density fluctuations as a natural mechanism for stabilizing microstructure of the colloidal solution and estimates the effect of fractal structure of colloidal particles on thermal conductivity of water. The results of this study may be useful for motivating choosing the composition of heat-transfer suspension and developing technology for making the appropriate nanofluid.