Table of Contents
Journal of Nanoscience
Volume 2013, Article ID 217382, 9 pages
http://dx.doi.org/10.1155/2013/217382
Research Article

Two-Dimensional Variable Property Conjugate Heat Transfer Simulation of Nanofluids in Microchannels

Faculty of Mechanical Engineering, Babol Noshirvani University of Technology, Shariati Avenue, P.O. Box 484, Babol, Mazandaran 47148 71167, Iran

Received 30 March 2013; Accepted 12 October 2013

Academic Editor: Zhengjun Zhang

Copyright © 2013 A. Ramiar and A. A. Ranjbar. 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

Laminar two-dimensional forced convective heat transfer of CuO-water and Al2O3-water nanofluids in a horizontal microchannel has been studied numerically, considering axial conduction effects in both solid and liquid regions and variable thermal conductivity and dynamic viscosity. The results show that using nanoparticles with higher thermal conductivities will intensify enhancement of heat transfer characteristics and slightly increases shear stress on the wall. The obtained results show more steep changes in Nusselt number for lower diameters and also higher values of Nusselt number by decreasing the diameter of nanoparticles. Also, by utilizing conduction number as the criterion, it was concluded from the results that adding nanoparticles will intensify the axial conduction effect in the geometry considered.