Magnetic nanofluid behavior including an immersed rotating conductive cylinder: finite element analysis

In this paper, numerical Galerkin Finite Element Method (GFEM) is applied for conjugate heat-transfer of a rotating cylinder immersed in Fe 3 O 4 -water nanofluid under the heat-flux and magnetic field. The outer boundaries of the cavity were maintained at low temperatures while beside the cylinder...

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Bibliographic Details
Published in:Scientific reports 2021-02, Vol.11 (1), p.4463-4463, Article 4463
Main Authors: Hamzah, Hameed K., Ali, Farooq H., Hatami, M., Jing, D., Jabbar, Mohammed Y.
Format: Article
Language:English
Subjects:
639/166/4073
639/166/898
639/166/988
Finite element method
Humanities and Social Sciences
Iron oxides
Low temperature
Magnetic fields
Magnetism
multidisciplinary
Nanoparticles
Science
Science (multidisciplinary)
Thermal conductivity
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Summary:In this paper, numerical Galerkin Finite Element Method (GFEM) is applied for conjugate heat-transfer of a rotating cylinder immersed in Fe 3 O 4 -water nanofluid under the heat-flux and magnetic field. The outer boundaries of the cavity were maintained at low temperatures while beside the cylinder were insulated. It is assumed that the cylinder rotates in both clockwise and counter-clockwise directions. The dimensionless governing equations such as velocity, pressure, and temperature formulation were analyzed by the GFEM. The results were evaluated using the governing parameters such as nanoparticles (NPs) volume fraction, Hartmann and Rayleigh numbers, magnetic field angle and NPs shapes. As a main result, the average Nusselt number increases by increasing the NPs volume fraction, inclination angle and thermal conductivity ratios, while increasing the Hartmann number decreased the Nusselt number. Furthermore, platelet NPs had the maximum average Nusselt number and spherical NPs made the minimum values of Nusselt numbers among examined NPs shapes.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-83944-0