Natural convection within water-zno nanofluid-filled hemispherical enclosure with a cubic electronic device
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Date
Authors
Haddad, O.
Bairi, A.
Alilat, N.
Bauzin, J.G.
Laraqi, N.
Journal Title
Journal ISSN
Volume Title
Publisher
HEFAT
Abstract
This work qualifies and quantifies the nanofluidic natural
convective phenomena occurring in a hemispherical enclosure
used for electronics applications. This cavity consists of a disk
thermally insulated on its rear face, an active cube centered on
the disk which generates a constant heat flux and an isothermal
dome. The disc of the cavity remains horizontal while its dome
is oriented either upwards or downwards. The considered
nanofluid is a mixture of water with metallic ZnO nanoparticles.
In order to examine the influence of these nanoparticles on the
natural convective heat transfer, three values of the volume
fraction considered: 0% (pure water), 1% and 5%. The
dimensionless governing system of the problem under
consideration is solved by means of the control volume method
in combination with the SIMPLE algorithm. The structured mesh
is composed of triangular surfacic elements and tetrahedral in the
volumic domain. Temperature and velocity distributions are
presented for some configurations and convective heat transfer
is examined for all processed ones. The natural convective heat
transfer is quantified by means of Nusselt-Rayleigh-Prandtl
correlations.
Description
Papers presented at the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Portoroz, Slovenia on 17-19 July 2017 .
Keywords
Water-zno nanofluid-fluid hemispherical enclosure, Cubic electronic device, Natural convection