Numerical study of MHD natural convection in a rectangular enclosure with an insulated block

Son, Jong Hyeon; Park, Il Seouk

doi:10.1080/10407782.2017.1330090

Cited by 26 publications

(7 citation statements)

References 34 publications

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“…J. H. Son and I. S. Park [9] numerically investigated a 2D laminar MHD natural convection within a heated rectangular enclosure, subjected to uniform horizontal magnetic field, with insulated square block. Simulations of heat transfer performance within the nanofluid were carried out for various Rayleigh number and Hartmann number with fixed Prandtl number.…”

Section: Introductionmentioning

confidence: 99%

MHD Natural Convection of a Fe3O4–Water Nanofluid within an Inside Round Diagonal Corner Square Cavity with Existence of Magnetic Source

et al. 2020

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This study concerns a numerical investigation of a magnetohydrodynamic (MHD) natural convection of a Fe3O4–water nanofluid filled within a round diagonal corner square cavity. The cavity was subjected to imposed temperatures (hot and cold walls) and one magnetic source. The nanofluid flow and heat transfer problem was mathematically modeled and its dimensionless problem was established. The finite element method was implemented in order to solve the MHD problem. The effects of the Rayleigh number, Hartmann number and round corner radius on the nanofluid flow (streamlines and velocity magnitude) and heat transfer (isotherms and temperature distribution) were evaluated. Heat transfer was assessed when the convection or the conduction dominates with regard to the nature of the flow.

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Section: Introductionmentioning

confidence: 99%

MHD Natural Convection of a Fe3O4–Water Nanofluid within an Inside Round Diagonal Corner Square Cavity with Existence of Magnetic Source

et al. 2020

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“…More so, the heat transfer and MHD natural convection flow was considered in a laterally heated enclosure with an off-centred partition by Kahveci and Öztuna [30]. Later on, Son and Park [31] investigated the two-dimensional laminar natural convection in a uniform magnetic field applied in the horizontal direction in an inversely heated rectangular enclosure with an insulated square block. In the presence of a chemical reaction, Motsa and Shateyi [32] investigated the Soret and Dufour effects on steady MHD natural convection flow over a semi-infinite moving vertical plate.…”

Section: Introductionmentioning

confidence: 99%

Using Micropolar Nanofluid under a Magnetic Field to Enhance Natural Convective Heat Transfer around a Spherical Body

Yaseen¹,

Alwawi

Swalmeh³

et al. 2022

ARFMTS

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An analysis is discussed of the heat and mass transfer for micropolar nanofluid in presence of natural convection from a spherical body with magneto-hydrodynamic (MHD) effects. The constant wall temperature boundary condition is also studied. By employing proper similarity transformations, the governing equations are converted into a set of partial differential equations (PDEs) with the used boundary conditions, which can then be solved numerically via the efficient Keller-box implicit numerical finite difference method. The numerical results of impacts of the controlling parameters on heat transfer physical quantities have been presented, tabular and graphically, by MATLAB symbolic software. Comparisons of the current study results to previously published results show good agreement, indicating that our numerical computations are legitimate and accurate. Increasing nanoparticle volume fraction is observed to depress local skin friction, Nusselt number, and angular velocity while the reverse effects are observed for velocity and temperature.

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“…From square enclosure to other different shaped cavities, researchers have extensively expanded the investigation of MHD natural convection. Nasri et al (2020), Son and Park (2017), Oki and Tanahashi (1995); and Islam et al (2022) studied the natural convection inside a square/rectangular enclosure in the presence of a magnetic field. Beyond the simple geometries, Giwa et al (2020) recently reviewed the research articles about MHD convection behaviors of nanofluids inside the non-square enclosures, and reported that such cases have attracted more attention of researchers than the square cavity in the past decade.…”

Section: Introductionmentioning

confidence: 99%

Conjugate MHD natural convection of hybrid nanofluids in a square enclosure containing a complex conductive cylinder

Wang

Li²,

Xi³

et al. 2022

HFF

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Purpose The purpose of this study is to investigate the enhancement and suppression of heat transfer for hybrid nanofluids (Cu–Al2O3/water) in a square enclosure containing a thermal-conductive cylinder when the Lorentz force is applied to the hybrid nanofluids. Design/methodology/approach Since the inner conductive cylinder in present research has a complex geometry, an in-house meshless method, namely, the local radial basis function (LRBF) method, is applied to solve the 2 dimensional (2D) incompressible Navier–Stokes equation in the fluid domain and Fourier heat conduction equation in solid domain. The solid–fluid interface remains the physical continuity of temperature and heat flux. Only the Lorentz force is considered for the presence of the magnetic field. The conjugate natural convection is assumed to be steady, thus only fully developed heat exchange from the nanofluids to solid or vice versa is comprehensively investigated. Findings It can be concluded that Lorentz force plays a more significant role than hybrid nanofluids in enhancing/suppressing heat transfer when the orientation of magnetic field is the same to the x direction. The thermal conductivity ratio can dramatically change the isotherms and streamlines as well as the mean value of the Nusselt number, resulting in totally different heat transfer phenomena. The included angle of magnetic field also has a significant effect on the heat transfer rate when it changes from horizontal to vertical. Research limitations/implications The constant thermo-physical properties of incompressible fluid and the 2D steady flow are considered in this study. Originality/value The conjugate MHD natural convection of hybrid nanofluids is numerically investigated by an in-house meshless LRBF method. The enhancement and suppression of heat transfer under the combined influence of the volume fraction of nanoparticles, Hartmann number and the thermal conductivity ratio are comprehensively investigated.

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Numerical study of MHD natural convection in a rectangular enclosure with an insulated block

Cited by 26 publications

References 34 publications

MHD Natural Convection of a Fe3O4–Water Nanofluid within an Inside Round Diagonal Corner Square Cavity with Existence of Magnetic Source

MHD Natural Convection of a Fe3O4–Water Nanofluid within an Inside Round Diagonal Corner Square Cavity with Existence of Magnetic Source

Using Micropolar Nanofluid under a Magnetic Field to Enhance Natural Convective Heat Transfer around a Spherical Body

Conjugate MHD natural convection of hybrid nanofluids in a square enclosure containing a complex conductive cylinder

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