THERMAL SCIENCE

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Mohamed El Hattab

,

Zakaria Lafdaili

TURBULENT NATURAL-CONVECTION HEAT TRANSFER IN A SQUARE CAVITY WITH NANOFLUIDS IN PRESENCE OF INCLINED MAGNETIC FIELD

ABSTRACT
In this paper, we present a numerical study of turbulent natural-convection in a square cavity differentially heated and filled with nanofluid and subjected to an inclined magnetic field. The standard k-ε model was used as the turbulence model. The transport equations were discretized by the finite volume method using the SIMPLE algorithm. The influence of the Rayleigh number, the Hartmann number, the orientation angle of the applied magnetic field, the type of nanoparticles as well as the volume fraction of nanoparticles, on the hydrodynamic and thermal characteristics of the nanofluid was illustrated and discussed in terms of streamlines, isotherms and mean Nusselt number. The results obtained show that the heat transfer rate increases with increasing Rayleigh number and orientation angle of the magnetic field but it decreases with increasing Hartmann number. In addition, heat transfer improves with increasing volume fraction and with the use of Al2O3 nanoparticles.
KEYWORDS
natural convection, k-ε turbulence model, magnetic field, nanofluid
PAPER SUBMITTED: 2021-08-25
PAPER REVISED: 2021-09-29
PAPER ACCEPTED: 2021-10-04
PUBLISHED ONLINE: 2021-11-06
DOI REFERENCE: https://doi.org/10.2298/TSCI210825326E
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 4, PAGES [3201 - 3213]
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Turbulent natural-convection heat transfer in a square cavity with nanofluids in presence of inclined magnetic field

© 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