Nu–Ra–Pr correlations for nanofluidic natural convection in tilted hemispherical enclosures with an active disk. (3rd June 2017)

• Record Type: Journal Article
• Authors: Baïri, A.; Haddad, O.; Alilat, N.
• Is Part Of: Numerical heat transfer. Volume 71:Number 11(2017)
• Page Start: 1094
• Page End: 1103
• Publication Date: 2017-06-03
• Subjects: Heat -- Transmission -- Measurement -- Periodicals; Mass transfer -- Measurement -- Periodicals; Numerical analysis -- Periodicals; 621.4022
• DOI: 10.1080/10407782.2017.1337985
• Languages: English
• ISSNs: 1040-7782

Abstract

ABSTRACT: This work qualifies and quantifies the natural convective phenomena occurring in a hemispherical enclosure filled with ZnO-Water monophasic nanofluid with a volume fraction varying between 0% (pure water) and 10%. The dome of the cavity is kept isothermal while its circular base generates a power varying between 0.5W and 400W. The disc can be inclined with respect to the horizontal plane by an angle varying between 0 and 180° (horizontal disk with a dome facing upwards and downwards respectively). The 3D numerical approach is carried out with the finite volume method based on the SIMPLE algorithm. The temperature and velocity distributions are presented and the convective heat transfer is examined for all processed configurations. The nanofluidic convective heat transfer is quantified by means of correlations of the Nusselt-Rayleigh-Prandtl-tilt angle type. They allow to optimize the thermal design of these cavities used in the field of electronics.