THERMAL SCIENCE

International Scientific Journal

Ching-Chang Cho

,

Her-Terng Yau

,

Cha'o-Kuang Chen

ENHANCEMENT OF NATURAL CONVECTION HEAT TRANSFER IN A U-SHAPED CAVITY FILLED WITH AL2O3-WATER NANOFLUID

ABSTRACT
This paper investigates the natural convection heat transfer enhancement of Al2O3-water nanofluid in a U-shaped cavity. In performing the analysis, the governing equations are modeled using the Boussinesq approximation and are solved numerically using the finite-volume numerical method. The study examines the effects of the nanoparticle volume fraction, the Rayleigh number and the geometry parameters on the mean Nusselt number. The results show that for all values of the Rayleigh number, the mean Nusselt number increases as the volume fraction of nanoparticles increases. In addition, it is shown that for a given length of the heated wall, extending the length of the cooled wall can improve the heat transfer performance.
KEYWORDS
nanofluid, Heat Transfer Enhancement, natural convection, Cavity
PAPER SUBMITTED: 2012-08-13
PAPER REVISED: 2012-09-03
PAPER ACCEPTED: 2012-09-12
DOI REFERENCE: https://doi.org/10.2298/TSCI1205317C
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2012, VOLUME 16, ISSUE Issue 5, PAGES [1317 - 1323]
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Enhancement of natural convection heat transfer in a U-shaped cavity filled with Al2O3-water nanofluid

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence