A numerical study of heat and mass transport by double‐diffusive magnetoconvection in an electrically conducting fluid under sinusoidal/non‐sinusoidal rotational modulation

Rudziva, Munyaradzi; Sibanda, Precious; Noreldin, Osman; Goqo, Sicelo P.

doi:10.1002/htj.22559

Cited by 8 publications

(3 citation statements)

References 65 publications

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“…They observed that the waviness of the lower surface of the cabinet could enhance the Nusselt number. Similar studies are available in the literature (Biswas et al, 2022;Hamzah et al, 2022;Cho, 2019;Hussain et al, 2017;Rudziva et al, 2022;.…”

Section: Introductionsupporting

confidence: 66%

On the analysis of thermosolutal mixed convection in differentially heated and soluted geometries beyond rectangular

Hansda

Pandit

2023

HFF

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Purpose This paper aims to study the impact of convexity and concavity of the vertical borders on double-diffusive mixed convection. In addition, the study of entropy generation is performed. This numerical study has been carried out for different patterns of wavy edges to reveal their effects on heat and mass transfer phenomena. Design/methodology/approach Four different flow features are treated by varying the directions of convexity and concavity of the vertical walls. A uniform temperature, as well as concentration distributions, are introduced to the left border while keeping a cold temperature and low concentration for the right border. The horizontal boundaries are in adiabatic condition. The upper border of the chamber is moving in the right direction with an equal speed. The governing Navies–Stokes equations are designed to describe energy and species transport phenomena, and these equations are solved by compact scheme. Findings The investigated results are analyzed for various parameters, namely, Prandtl number, Richardson number, thermal Grashof number, Lewis number, Buoyancy ratio and amplitude of the wavy walls. It is observed that the thermal and solutal transfer performance becomes effective with lower Richardson numbers. The results reveal that the concavity and convexity of the side borders of the cabinet can control the thermosolutal performance. It is also observed that among all wavy chambers, Case-4 records maximum thermosolutal transfer rate, while Case-3 attains minimum thermosolutal transfer rate. Originality/value This work is an example of solar thermal power conversion, power collection systems, systems of energy deficiency, etc.

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Section: Introductionsupporting

confidence: 66%

On the analysis of thermosolutal mixed convection in differentially heated and soluted geometries beyond rectangular

Hansda

Pandit

2023

HFF

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“…To name a few, oceanography, magma chambers, solar ponds, solidification of alloys, cooling towers, drying technologies, solar collector, pin-fin devices, insulation of nuclear reactor, solar plate collector, cooling process of electronic devices, and so forth. [1][2][3][4][5][6][7][8][9][10] On the other hand, the deviation from the idealized conditions (i.e., uniform temperature and concentration) is quite frequently found in the pragmatic conditions. Therefore, an in-depth study of heat and mass transfer (HMT) characteristics in such systems subjected to nonuniform heating and concentration conditions is of prime essence.…”

Section: Introductionmentioning

confidence: 99%

“…DDC has all‐embracing findings in different natural and man‐made activities. To name a few, oceanography, magma chambers, solar ponds, solidification of alloys, cooling towers, drying technologies, solar collector, pin‐fin devices, insulation of nuclear reactor, solar plate collector, cooling process of electronic devices, and so forth 1–10 . On the other hand, the deviation from the idealized conditions (i.e., uniform temperature and concentration) is quite frequently found in the pragmatic conditions.…”

Section: Introductionmentioning

confidence: 99%

Effect of the aspect ratio of the shallow enclosure and built‐in rectangular blockage on MHD double‐diffusive free convection subjugated to non‐uniform boundary conditions

Kumar

Gangawane

2022

Heat Trans

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In this study, the lattice Boltzmann method is used to explore the double‐diffusive natural convection within a shallow enclosure with a built‐in rectangular blockage at its geometric center. The enclosure is exposed to an external magnetic field. One of the enclosure walls is subjected to linearly/sinusoidal heating and concentration conditions. The rectangular blockage is at higher temperature and concentration conditions. Numerical experimentation is executed for a range of parameters such as Rayleigh number MathClass-open( 1 0 3 ≤ R a ≤ 1 0 5 MathClass-close) $(1{0}^{3}\le Ra\le 1{0}^{5})$, Lewis number MathClass-open( 2 ≤ L e ≤ 10 MathClass-close) $(2\le Le\le 10)$, buoyancy ratio MathClass-open( − 2 ≤ N ≤ 2 MathClass-close) $(-2\le N\le 2)$, aspect ratio of the enclosure MathClass-open( 2 ≤ A R ≤ 4 MathClass-close) $(2\le AR\le 4)$, aspect ratio of the built‐in blockage MathClass-open( 2 ≤ a r ≤ 4 MathClass-close) $(2\le ar\le 4)$, and Hartmann number MathClass-open( 0 ≤ H a ≤ 100 MathClass-close) $(0\le Ha\le 100)$. The working fluid is assumed to be liquid metal (sodium–potassium alloy, P r = 0.054 $Pr=0.054$). The complex interaction of flow parameters with the nonuniform heating and concentration conditions has been explored. Higher heat and mass transfer (HMT) rates are noticed for the sinusoidal temperature and concentration profile compared to linear for a given R a $Ra$. N u t o t a l $N{u}_{total}$ and S h t o t a l $S{h}_{total}$ showed enhancement by 22 % $22 \% $, and 21 % $21 \% $ for sinusoidal temperature and concentration profile of the enclosure as compared to linear for A R = 2 $AR=2$. The increase in the blockage and the enclosure aspect ratio shows augmentation in the HMT rate. The consequences of the study are also summarized in terms of empirical correlations of the N u t o t a l $N{u}_{total}$ and S h t o t a l $S{h}_{total}$ numbers showing functional dependence on the considered range of parameters.

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Effect of Magnetic-Field Modulation on the Instability of Micropolar Nanofluid Filled Within Hele-Shaw Cell

Ismail,

Bhadauria,

Shilpee

2024

Lecture Notes in Networks and Systems

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A numerical study of heat and mass transport by double‐diffusive magnetoconvection in an electrically conducting fluid under sinusoidal/non‐sinusoidal rotational modulation

Cited by 8 publications

References 65 publications

On the analysis of thermosolutal mixed convection in differentially heated and soluted geometries beyond rectangular

On the analysis of thermosolutal mixed convection in differentially heated and soluted geometries beyond rectangular

Effect of the aspect ratio of the shallow enclosure and built‐in rectangular blockage on MHD double‐diffusive free convection subjugated to non‐uniform boundary conditions

Effect of Magnetic-Field Modulation on the Instability of Micropolar Nanofluid Filled Within Hele-Shaw Cell

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