Effects of Buoyancy Parameter on Unsteady 3d Double Diffusive Convection in Molten Pb-Sn Alloys

Öztop, Hakan F.; Chemseddine, Maatki; Kolsi, Lioua; Al‐Rashed, Abdullah A.A.A.; Borjini, Mohamed Naceur; Abu-Hamdeh, Abu-Hamdeh

doi:10.5098/hmt.8.33

Cited by 2 publications

(1 citation statement)

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“…Masuda et al (2013) studied analytically a double diffusive convection in the cavity with porous medium. Maatki et al (2014Maatki et al ( , 2016Maatki et al ( , 2017a and 2017b) studied the effects of buoyancy ratio, entropy generation and magnetic field on the double diffusive convection in a cubic cavity. Ghachem et al (2012Ghachem et al ( , 2015Ghachem et al ( , 2016Ghachem et al ( , 2017Ghachem et al ( and 2018 investigated the three-dimensional double diffusive natural convection in a solar distiller and a solar pond.…”

Section: Introductionmentioning

confidence: 99%

Double-diffusive natural convection in a trapezoidal solar pond with discrete heat boundary conditions: Effects on non-convective zones

Almeshaal¹

2021

JTST

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Section: Introductionmentioning

confidence: 99%

Double-diffusive natural convection in a trapezoidal solar pond with discrete heat boundary conditions: Effects on non-convective zones

Almeshaal¹

2021

JTST

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Magneto-thermal-convection stability in an inclined cylindrical annulus filled with a molten metal

Mebarek‐Oudina

Bessaïh

Mahanthesh

et al. 2020

HFF

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Purpose Metal-cooled reactors generally use molten metals such as sodium, potassium or a combination of sodium and potassium because of their excellent heat transfer properties so that the reactor can operate at much lower pressures and higher temperatures. The purpose of this paper is to investigate the stability of natural convection in an inclined ring filled with molten potassium under the influence of a radial magnetism. Design/methodology/approach A numerical simulation of electrically conductive fluid natural convection stability is performed on an inclined cylindrical annulus under the influence of a radial magnetism. The upper and lower walls are adiabatic, while the internal and external cylinders are kept at even temperatures. The equations governing this fluid system are solved numerically using finite volume method. The SIMPLER algorithm is used for pressure-speed coupling in the momentum equation. Findings Numerical results for various effective parameters that solve the problem in the initial oscillatory state are discussed in terms of isobars, isotherms and flow lines in the annulus for a wide range of Hartmann numbers (0 ≤ Ha ≤ 80), inclination angles (0 ≤ γ ≤ 90°) and radii ratios λ ≤ 6. The dependency stability diagrams between complicated situations with the critical value of the Rayleigh number RaCr and the corresponding frequency FrCr are established on the basis of the numeric data of this investigation. The angle of inclination and the radii ratio of the annulus have a significant effect on the stabilization of the magneto-convective flux and show that the best stabilization of the natural oscillatory convection is obtained by the intensity of the strongest magnetic field, the high radii ratio and inclination of the annulus at γ = 30°. Practical implications This numerical model is selected for its various applications in technology and industry. Originality/value To the best of the authors’ knowledge, the influence of the inclination of the cylindrical annulus (ring), with various radii ratio, on natural oscillatory convection under a radial magnetism has never been investigated.

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Effects of Buoyancy Parameter on Unsteady 3d Double Diffusive Convection in Molten Pb-Sn Alloys

Cited by 2 publications

References 16 publications

Double-diffusive natural convection in a trapezoidal solar pond with discrete heat boundary conditions: Effects on non-convective zones

Double-diffusive natural convection in a trapezoidal solar pond with discrete heat boundary conditions: Effects on non-convective zones

Magneto-thermal-convection stability in an inclined cylindrical annulus filled with a molten metal

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