Periodic natural convection in a nanofluid-filled enclosure with oscillating heat flux

Ghasemi, B. and Aminossadati, S. M. (2010) Periodic natural convection in a nanofluid-filled enclosure with oscillating heat flux. International Journal of Thermal Sciences, 49 1: 1-9. doi:10.1016/j.ijthermalsci.2009.07.020


Author Ghasemi, B.
Aminossadati, S. M.
Title Periodic natural convection in a nanofluid-filled enclosure with oscillating heat flux
Journal name International Journal of Thermal Sciences   Check publisher's open access policy
ISSN 1290-0729
Publication date 2010-01
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.ijthermalsci.2009.07.020
Volume 49
Issue 1
Start page 1
End page 9
Total pages 9
Place of publication Cedex, France
Publisher Elsevier Masson
Collection year 2011
Language eng
Abstract This paper examines the periodic natural convection in an enclosure filled with nanofluids. Whilst a heat source with oscillating heat flux is located on the left wall of the enclosure, the right wall is maintained at a relatively low temperature and the other walls are thermally insulated. Based upon numerical predictions, the effects of pertinent parameters such as Rayleigh number, solid volume fraction, heat source position, type of nanoparticles and oscillation period are examined. A periodic behaviour is found for the flow and temperature fields as a result of the oscillating heat flux. The utilisation of nanoparticles, in particular Cu, enhances the heat transfer especially at low Rayleigh numbers. In addition, the oscillation period of heat generation affects the maximum operational temperature of the heat source. It is also interesting to observe that the optimum position of the heat source on the left wall is a function of Rayleigh number. The results of this study can be used in the design of an effective cooling system for electronic components to help ensure effective and safe operational conditions. © 2009 Elsevier Masson SAS. All rights reserved.
Keyword Periodic natural convection
Enclosure
Nanofluids
Oscillating heat flux
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 14 August 2009

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Mechanical & Mining Engineering Publications
 
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Created: Sun, 07 Feb 2010, 00:05:12 EST