Computational study of double diffusive MHD natural convection flow of non-Newtonian fluid between concentric cylinders

Results in Engineering, Год журнала: 2024, Номер 21, С. 101925 - 101925

Опубликована: Фев. 16, 2024

This study investigated double diffusion natural convection of Casson fluids in an asymmetrical cavity under a constant magnetic field. The intricacies flow and heat/mass transfer were explored computationally using the finite element method. Applications exist geology, oceanography, metallurgy, astrophysics. impacts Rayleigh number, parameter, number peaks, Darcy on entropy generation, velocity, temperature/concentration gradients quantified. Key findings showed that by increasing chaos vigor intensified, thereby boosting gradients. Furthermore, elevating streamlines narrowed mixing was reduced owing to more solid-like behavior. Additionally, varying complexity modulated, thus allowing for strategic optimization localized rates. Moreover, positively correlated with Nusselt/Sherwood numbers, enhancing diffusion. Likewise, expanded configuration options, consequently system entropy. computational approach enabled modeling precluded analytical approaches, while simultaneously providing insight than experiments. Predictions entropy, heat transfer, rates will guide designs enhanced efficiency thermal control applications spanning underground pipelines, boilers, nuclear/thermal plants, energy storage. Specifically, modulation parameters optimize minimize generation lead improved utilization high-temperature industrial processes advancing sustainability.

Язык: Английский

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Effects of oscillation on convective thermal flow in a vertical enclosure filled by nanofluid particles

Case Studies in Thermal Engineering, Год журнала: 2024, Номер 61, С. 105133 - 105133

Опубликована: Сен. 1, 2024

Язык: Английский

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An overview of the magnetic field effect on heat transfer and entropy generation in cavities: Application of the second law of thermodynamics and artificial intelligence

International Communications in Heat and Mass Transfer, Год журнала: 2024, Номер 151, С. 107238 - 107238

Опубликована: Янв. 14, 2024

Язык: Английский

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Local thermal non-equilibrium effects on radiative ternary hybrid nanofluid with thermophoresis and Stefan Blowing impacts: Yamada-Ota and Xue model

Journal of Radiation Research and Applied Sciences, Год журнала: 2025, Номер 18(1), С. 101315 - 101315

Опубликована: Фев. 5, 2025

Язык: Английский

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Double diffusive thermogravitational convection in a convex U-shaped porous chamber filled with radiative ternary hybrid nanoliquid

Physics of Fluids, Год журнала: 2024, Номер 36(7)

Опубликована: Июль 1, 2024

This research deals with the intricate dynamics of double diffusive thermogravitational convection within a convex U-shaped porous chamber and sheds light on use radiative ternary hybrid nanoliquid. In this configuration, lower flat boundary is assumed to be thermally hot densely concentrated while curved lateral boundaries remain cold dilute. The other enclosure are kept under adiabatic conditions. governing Navier–Stokes equations along thermal species effectively solved by employing higher order compact technique. developed in-house program has been rigorously verified against experimental computational benchmark results. meticulously examines impact several pivotal parameters, including Lewis number (1≤Le≤20), buoyancy ratio (0≤N≤10), Darcy (10−4≤Da≤10−2), Rayleigh (104≤Ra≤106), volumetric heat source/sink coefficient (−10≤q≤10), radiation parameter (1≤Rd≤5), aspect (0.2≤AR≤0.6), solid particles concentration (0.0≤ϕthnp≤0.04) nanofluid. findings eloquently portrayed through graphical representations showcasing streamlines, iso-solutals, isotherms, dimensionless Nusselt (Nuavg) Sherwood (Shavg) parameters. Our investigation demonstrates that nanofluid outperforms both mono nanofluids in facilitating diffusion processes. Moreover, optimal transfer efficiency achieved conditions characterized an AR = 0.2, Ra=106, Da=10−2, N 10, Le 1, volume fraction ϕthnp=0.04.

Язык: Английский

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Enhanced thermal performance and entropy generation analysis in a novel cavity design with circular cylinder

Heat Transfer, Год журнала: 2024, Номер 53(3), С. 1446 - 1473

Опубликована: Янв. 9, 2024

Abstract Analyzing fluid dynamics and heat transfer holds significant importance in the design enhancement of engineering systems. The current investigation utilizes finite element method to explore natural convection intricacies within a novel cavity containing an inner circular cylinder under steady laminar flow conditions. principal aim this study is assess impact Rayleigh number ( Ra ), Bejan Be presence adiabatic, hot, cold cylinders on transfer, entropy generation, flow. range considered spans from 10 3 6 , while Prandtl for air fixed at 0.71. findings illustrate that leads higher as increase, compared scenarios where no present. This observation suggests buoyancy forces dominate absence cylinder, resulting significantly enhanced convective efficiency. However, heated tooth‐shaped exerts substantial influence overall thermal performance system. Notably, average Nusselt Number Nu ) experiences remarkable increase 41.97% when situations elevated signifies improved characteristics, ultimately improvement system's

Язык: Английский

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Leveraging artificial neural networks approach for thermal conductivity evaluation in porous rectangular wetted fins filled with ternary hybrid nanofluid

Journal of Radiation Research and Applied Sciences, Год журнала: 2024, Номер 17(4), С. 101125 - 101125

Опубликована: Сен. 23, 2024

Язык: Английский

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Simultaneous numerical examination of thermal and entropy characteristics of Al2O3–H2O nanofluid within a porous diamond-shaped container with a ⊥-shaped obstacle

Case Studies in Thermal Engineering, Год журнала: 2024, Номер 54, С. 104059 - 104059

Опубликована: Янв. 24, 2024

The present work may deal with the flow, heat transfer and entropy dissections of hydromagnetic buoyancy-driven nanoliquid inside a diamond-shaped container considering ⊥- shaped obstacle varying configurations subject to heat/sink source porous matrix. importance above problem is due its potential utilizations in modern industries such as thermal extrusion systems, solar energy collectors, exchangers, microelectronic cooling, automobiles, building ventilation, bio-medicine etc. equations governed well be solved via finite element method. work's novelty would introduction diamond cavity embodying matrix analyzing flow along aspects there in. main findings are that alteration nature from hydrodynamic whittles down streamlines augments isotherms at given Rayleigh number presence source/sink medium. Total exhibits 3896 % enhancement average Bejan shows sharp 85.5 diminution rise number. outcomes study finds effective persistent industrial cooling better stability alumina nanoparticles nanofluid involved complex geometries like cavities which beyond existing literature.

Язык: Английский

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Lattice Boltzmann study on magnetohydrodynamic double-diffusive convection in Fe3O4–H2O nanofluid-filled porous media

Case Studies in Thermal Engineering, Год журнала: 2024, Номер 58, С. 104405 - 104405

Опубликована: Апрель 17, 2024

Magnetohydrodynamic double-diffusive convection (MHD-DDC) in porous media has substantial significance broad applications. However, due to the complexity of DDC problems involving nanofluid, media, and external magnetic field at same time, MHD-DDC nanofluid-filled rarely been studied. Besides, previous research on MHD usually focuses fields or nanofluid effects. Effects thermal-to-mass properties, including buoyancy radio (Br) Lewis number (Le), have studied, seriously limiting understanding regulation heat mass transfer. Herein, we numerically study transfer within a square cavity containing Fe3O4-H2O medium using lattice Boltzmann method. A series case studies are carried out investigate effects Br, Le, porosity (ε) velocity, temperature, nanoparticle concentration. Results indicate that Br determines rotation pattern streamline, while Le ε can be utilized regulate intensity exchange. The results this paper present quantitative insight into regulating patterns problems.

Язык: Английский

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Response surface method and finite element-based investigation of uniform/nonuniform hydromagnetic convection of nanofluids inside a quarter-circular enclosure

Numerical Heat Transfer Part B Fundamentals, Год журнала: 2024, Номер unknown, С. 1 - 23

Опубликована: Март 9, 2024

Under the influence of magnetohydrodynamics (uniform, periodic, and inclined), current research evaluates two-dimensional unsteady dynamics natural convection flow heat transportation in quarter-circular domain considering Brownian motion nanoparticles. The nonlinear partial differential equations (PDEs) solver finite element method (FEM) Galerkin type is used for numerical simulation. In addition, central composite design-based response surface methodology (RSM) applied to analyze optimization outcomes. To assess models' significance learning optimum thermal transport efficiency nanofluids, an analysis variance performed. impacts several physical characteristics such as Rayleigh number, nanoparticles volume fraction, mean Nusselt effects, size, shape nanoparticles, magnetic effects inclined) are examined. transfer rate significantly influenced by field's period inclined angle. As illustration, optimal transmission noted at λ = 0.75 γ 0°. When included, increases 23.44% it rises 39.34% nanoparticle size drops from 100 nm 10 nm. Moreover, compared spherical nano-sized particles, blade-shaped particles can improve 9.56%. Furthermore, independent factors (Ra, Ha, ϕ, dp) on function Nu (average) demonstrated statistical RSM technique, a novel correlation proposed based FEM data. (Nuav 24.045) found when Ra 10, Ha 0, ϕ 0.05, dp model's average number's R2-value 0.9927 indicates that results effective.

Язык: Английский

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