LTNE modeling of Magneto-Ferro natural convection inside a porous enclosure exposed to nonuniform magnetic field

Mohsen Izadi, Rasul Mohebbi, Hasan Sajjadi and Amin Amiri Delouei

Physica A: Statistical Mechanics and its Applications, 2019, vol. 535, issue C

Abstract: Applying LTNE model, the natural convection of a porous enclosure, exposed to a nonuniform magnetic field, was numerically analyzed. At such conditions, the buoyancy, the Lorentz and magnetization forces are applied to the hybrid nanofluid. Utilizing the finite element technique, the set of governing equations pertinent to the present problem was discretized and solved. To validate the results of the current study, they are compared to previous studies and a good compromise is observed. The power ratio of the two magnetic sources γr, the porosity coefficient, Rayleigh number, thermal conductivity proportion of hybrid nanofluid to that of the matrix material, local heat exchange between nanofluid and solid surface inside the pores, magnetization and Hartmann numbers on the flow and thermal indices have been perused. The results indicate that the Nusselt numbers of the two phases of porous material converge with increasing γr; whereas, these two thermal indices vary with reducing γr. Also, the application of the local thermal equilibrium is justifiable when the Hartmann number and Lorentz forces acting on the hybrid nanofluid increase.

Keywords: LTNE modeling; Hybrid nanofluid; Magneto-ferro natural convection; Nonuniform magnetic fields (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:535:y:2019:i:c:s0378437119313767

DOI: 10.1016/j.physa.2019.122394

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