Non-Newtonian MHD double diffusive natural convection flow and heat transfer in a crown enclosure

Rashid, Umair; Shahzad, Hasan; Lu, Dianchen; Wang, Xinhua; Majeed, Afraz Hussain

doi:10.1016/j.csite.2022.102541

Cited by 21 publications

(3 citation statements)

References 16 publications

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“…The researcher Astanina et al [23] focused on thermogravitational convection in a porous cube with a non-uniform heating of the vertical wall. The mathematical modeling of fluid flow in the heated center of a wavy-shaped cavity as discussed by Rashid et al [24], focusing on the thermal and diffusive transport in a MHD Casson fluid flow. This study is part of the significant attention given to DDNC in various fields, such as oceanography, metallurgy, and astrophysics.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Double-Diffusive Convection in an Irregular Porous Cavity Subjected to Inclined Magnetic Field Using Finite Element Method

Chuhan,

Li,

Ahmed

et al. 2024

Mathematics

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Purpose—This study aims to perform an in-depth analysis of double-diffusive natural convection (DDNC) in an irregularly shaped porous cavity. We investigate the convective heat transfer process induced by the lower wall treated as a heat source while the side walls of the enclosure are maintained at a lower temperature and concentration, and the remaining wall is adiabatic. Various factors, such as the Rayleigh number, Darcy effects, Hartmann number, Lewis number and effects of magnetic inclination are evaluated for their influence on flow dynamics and heat distribution. Design/methodology/approach—After validating the results, the FEM (finite element method) is used to simulate the flow pattern, temperature variations, and concentration by solving the nonlinear partial differential equations with the modified Rayleigh number (104 ≤ Ra ≤ 107), Darcy number (10−4 ≤ Da ≤ 10−1), Lewis number (0.1≤Le≤10), and Hartmann number 0≤Ha≤40 as the dimensionless operating parameters. Findings—The finding shows that the patterns of convection and the shape of the isotherms within porous enclosures are notably affected by the angle of the applied magnetic field. This study enhances our understanding of how double-diffusive natural convection (DDNC) operates in these enclosures, which helps improve heating and cooling technologies in various engineering fields. Research limitations/implications—Numerical and experimental extensions of the present study make it possible to investigate differences in thermal performance as a result of various curvatures, orientations, boundary conditions, and the use of three-dimensional analysis and other working fluids. Practical implications—The geometry configurations used in this study have wide-ranging applications in engineering fields, such as in heat exchangers, crystallization, microelectronics, energy storage, mixing, food processing, and biomedical systems. Originality/value—This study shows how an inclined magnetic field affects double-diffusive natural convection (DDNC) within a porous system featuring an irregularly shaped cavity, considering various multiphysical conditions.

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Double-Diffusive Convection in an Irregular Porous Cavity Subjected to Inclined Magnetic Field Using Finite Element Method

Chuhan,

Li,

Ahmed

et al. 2024

Mathematics

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“…The double‐diffusive with a slightly more complex enclosure was also presented by other researchers. Some of these studies focused on rectangular enclosures, 40 trapezoidal enclosures, 41 crown enclosures, 42 as well as wavy enclosures 43,44 …”

Section: Introductionmentioning

confidence: 99%

“…The double-diffusive with a slightly more complex enclosure was also presented by other researchers. Some of these studies focused on rectangular enclosures, 40 trapezoidal enclosures, 41 crown enclosures, 42 as well as wavy enclosures. 43,44 From the above literature, it can be seen that studies on double-diffusive heat transfer phenomena in simple enclosures have been widely discussed.…”

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confidence: 99%

Analysis of double‐diffusive hydrothermal flow in a domestic stack: The effect of side walls patterns

Hamza,

Abdulkadhim,

Mohsen

et al. 2023

Heat Trans

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Domestic stack is considered to investigate the double‐diffusive laminar natural convection. The working fluid is a gaseous mixture that has similar physical properties to carbon dioxide. Knowing the patterns of gaseous mixture distribution and determining the carbon deposit regions can help in carbon capture problems. The present study uses the finite element method to numerically examine the double ratio‐diffusive physical phenomena in a rectangular‐trapezoidal enclosure and to simulate the stack under a wide range of dimensionless parameters, such as buoyancy ratio , Lewis number , and Rayleigh number for different aspect ratios. Nine different cases of the geometrical ratio are selected to cover most possible design configurations. The results indicate that increasing the Lewis number leads to augmented solutal transport but reduces heat transfer. However, both heat and mass transfer are observed by increasing the buoyancy ratio. It is worth mentioning that increasing the ratio of upper side length to base length from to leads to a significant increase in mass transfer by 75% and heat transfer enhancement ratio by around 50%.

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Numerical analysis of Soret/Dufour MHD convection in a NEPCM‐filled cavity with partial porous foam: Double pipe heat exchanger application

Alomari,

Hassan,

Al‐Salami

et al. 2024

Heat Trans

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The current work extensively investigates double‐diffusive of nano‐encapsulated phase change material in a thermal storage system partially filled with porous foam. The generation of irreversibilities and the influence of Soret/Dufour and magnetohydrodynamic effects are also considered. The circular cold cavity contains a corrugated hot cylinder covered by an annular foam. The considered parameters are Rayleigh number (103–105), fusion temperature (0.1–0.9), Stefan number (0.1–0.9), volume concentration of nanoparticles (0–0.05), Darcy number (10−4–10−1). Hartmann number (0–80) and the undulations of the inner (3–9). The numerical analysis has exploited the finite element approximations. The results indicate that Rayleigh and Hartmann numbers greatly influence the fluid flow, isotherms, concentrations and the melting/solidification region. The fusion has also a great influence on the melting/solidification region while there is no evident influence on the flow, isotherms and the concentrations where both Nusselt and Sherwood numbers change with around 5% with the change of the fusion temperature and Stefan number. In contrast, both values are decreased by around 30% by decreasing the Da number from 0.1 to 10−4. Furthermore, the change of the undulations number has very low influence on heat transfer, mass transfer and the melting/solidification region.

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Non-Newtonian MHD double diffusive natural convection flow and heat transfer in a crown enclosure

Cited by 21 publications

References 16 publications

Numerical Investigation of Double-Diffusive Convection in an Irregular Porous Cavity Subjected to Inclined Magnetic Field Using Finite Element Method

Numerical Investigation of Double-Diffusive Convection in an Irregular Porous Cavity Subjected to Inclined Magnetic Field Using Finite Element Method

Analysis of double‐diffusive hydrothermal flow in a domestic stack: The effect of side walls patterns

Numerical analysis of Soret/Dufour MHD convection in a NEPCM‐filled cavity with partial porous foam: Double pipe heat exchanger application

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