Thermal performance of nanofluid saturated porous medium on cooling electronics contained in an inclined hemispherical enclosure

A. Baïri and N. Laraqi ()
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A. Baïri: Université de Paris, Laboratoire Thermique Interfaces Environment (LTIE), EA 4415, Département GTE, 50, Rue de Sèvres, F-92410 Ville d’Avray, France
N. Laraqi: Université de Paris, Laboratoire Thermique Interfaces Environment (LTIE), EA 4415, Département GTE, 50, Rue de Sèvres, F-92410 Ville d’Avray, France

International Journal of Modern Physics C (IJMPC), 2018, vol. 29, issue 06, 1-14

Abstract: A nanofluid saturated porous medium is used for cooling purposes of a plane electronic device contained in the base of a hemispherical cavity. According to the intended application in embarked electronics, the base could be tilted with respect to the horizontal plane by an angle ranging from 0∘ to 180∘ (horizontal disc with cupola facing upwards and downwards, respectively). The volume fraction of the considered monophasic water-based ZnO nanofluid varies between 0% (pure water) and 10%, while the Rayleigh number based on the radius of the cavity ranges from 5.21×107 to 7.29×1010. The ratio between the thermal conductivity of the porous medium solid matrix and that of the base fluid varies between 0 and 70. Influence of these four parameters on the average temperature of the active electronic device is presented and commented. The work shows that the saturated porous medium has a significant effect on the thermal state of the electronic device. A correlation is proposed to easily calculate this temperature for any combination of these parameters, which allows thermal sizing for optimal cooling of this assembly used in electronics engineering.

Keywords: Free convection; H2O-ZnO nanofluid; electronics thermal control; porous medium; hemispherical cavity (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1142/S0129183118500390

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