Table of Contents
Journal of Nanoparticles
Volume 2013 (2013), Article ID 601363, 5 pages
http://dx.doi.org/10.1155/2013/601363
Research Article

Experimental Investigation into the Forced Convective Heat Transfer of Aqueous Fe3O4 Nanofluids under Transition Region

1College of Science, University of Shanghai for Science and Technology, Jungong Road 516, Shanghai 200093, China
2Green Biochemical and Ecochemical Engineering Lab, University of Shanghai for Science and Technology, Jungong Road 516, Shanghai 200093, China

Received 7 November 2012; Revised 27 February 2013; Accepted 5 March 2013

Academic Editor: Yang Xu

Copyright © 2013 Jie Ma et al. 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

The forced convective heat transfer (FCHT) properties of nanofluids, made of Fe3O4 nanomaterials and deionized water, are firstly measured by a self-made forced convective heat transfer apparatus. The nanofluid flows through a horizontal copper tube in the transition region with Reynolds numbers in the range of 2500–5000. Some parameters including Reynolds number, axial distance, and mass concentration are also investigated. The preliminary results are firstly presented that the heat transfer coefficients of Fe3O4 nanofluids systematically decrease with increasing concentration of nanoparticles under transition region which contradicts the initial expectation.