Table of Contents
ISRN Nanotechnology
Volume 2013, Article ID 479763, 5 pages
http://dx.doi.org/10.1155/2013/479763
Research Article

Experimental Investigation of Thermal Conductivity and Effusivity of Ferrite Based Nanofluids under Magnetic Field

1DRDO Center for Piezoceramics and Devices, ARDE, Pashan, Pune 411021, India
2Nanomaterials and Sensors Laboratory, Defence Institute of Advanced Technology (DU), Girinagar, Maharashtra, Pune 411025, India

Received 23 May 2013; Accepted 12 June 2013

Academic Editors: D. R. Chen, S. Maksimenko, and D. K. Yi

Copyright © 2013 Ashok K. Singh and Vijay S. Raykar. 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

We investigate the effect of magnetic field () on the thermal conductivity () and effusivity () of cobalt ferrite based nanofluids having different concentrations (). Cobalt ferrite nanoparticles (NPs) have been synthesized using the microwave assisted method. At high volume fraction of cobalt ferrite nanoparticles in water ( > 0), both thermal parameters have been found to be suppressed relative to and of water in the absence of . However, it is seen that percentage values of the effusivity in perpendicular field direction show negative to positive variation, and thermal conductivity in parallel field direction shows negative to zero variation.