This paper presents a numerical analysis of the natural convective heat transfer of magnetite/graphite slurry non-Newtonian ferrofluid in a square enclosure under a variable external magnetic field. A heat source with variable temperature distribution is located at the bottom of the enclosure. The left and right walls of the enclosure are at a relatively low temperature. The top wall and part of the bottom wall are thermally insulated. Experimental results are used to obtain the non-Newtonian behavior of graphite slurry and to obtain the properties of its temperature function. The governing equations take into account the effects of ferrohydrodynamics, magnetohydrodynamics, and non-Newtonian fluid behavior. The effects of the Rayleigh number, magnetic number, and Hartmann number on the heat transfer and fluid flow are studied. The results show that, at low Rayleigh numbers, the increase in the Hartmann number does not have any effect on the heat transfer. At high Rayleigh numbers, the heat transfer decreases as the Hartmann number increases. This decrease becomes less significant at higher Rayleigh numbers. The results also show that the strength of the applied magnetic field (the Kelvin force) should reach a certain value ( M n f * 10 4 ) so that it can affect the heat transfer.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Natural Convective Heat Transfer of Magnetite/Graphite Slurry Under a Magnetic Field


    Beteiligte:
    Pishkar, I. (Autor:in) / Ghasemi, B. (Autor:in) / Raisi, A. (Autor:in) / Aminossadati, S. M. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2019-05-30


    Format / Umfang :

    13 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Graphite sublimation under low and high convective mass transfer environments

    Maurer, R. / Powards, C. / Hartman, G. | Tema Archiv | 1976


    Natural Convective Heat Transfer from Vertical Isothermal Polygonal Cylinders

    Kalendar, Abdulrahim / Alhendal, Yousuf / Hussain, Shafqat et al. | AIAA | 2021


    TURBULENT FORCED CONVECTIVE HEAT TRANSFER

    Murray, J. / S, E. / International Council of the Aeronautical Sciences | British Library Conference Proceedings | 2004


    Experimental convective heat-transfer measurements

    COLLINS, D. J. / HORTON, T. E. | AIAA | 1964