Local thermal non-equilibrium condition on mixed convection of a nanofluid-filled undulating cavity containing obstacle and saturated by porous media

Alsedais, Noura; Aly, Abdelraheem M.; Mansour, M. A.

doi:10.1016/j.asej.2021.08.005

Cited by 14 publications

(3 citation statements)

References 37 publications

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“…Jakeer et al (2021) investigated the influence of a heated obstruction's location within a lid-driven porous cavity. Recently, Alsedais et al (2022) explored the roles of radiation and heat generation under the local thermal non-equilibrium condition in an undulating porous cavity containing a solid obstacle.…”

Section: Introductionmentioning

confidence: 99%

Ferrohydrodynamics Mixed Convection of a Ferrofluid in a Vertical Channel with Porous Blocks of Various Shapes

2023

JAFM

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Numerical simulations of (water-Fe3O4) ferrohydrodynamics (FHD) mixed convection inside a vertical channel are performed. The magnetic field is produced by three sources positioned outside the channel’s right wall. The latter is provided with localized heat sources surmounted by variously shaped porous blocks: rectangular, trapezoidal, and triangular. The general model of Darcy-Brinkman-Forchheimer is employed to describe the fluid flow in the porous regions, and the resulting equations are numerically solved by the finite volume approach. The influence of significant parameters, including the magnetic number (Mn), the Richardson number (Ri), and the shape of blocks, is examined. The results essentially reveal that the enhanced heat transfer brought by the magnetic field and its intensity increase is suppressed by the augmentation of Ri until a critical value, rising with Mn, beyond which the global Nusselt number increases again. The mean friction coefficient increases with increased Mn and reduced Ri. Compared to the case with no magnetic field, the maximum enhancement in heat transfer rate is around 132% for the rectangular blocks, 146% for the trapezoidal blocks, and 160% for the triangular blocks, while the maximum increase in pressure drop is approximately 45% for all the shapes. The triangular shape seems the most efficient because it leads to high heat transfer rates and low mean friction coefficients; its performance factor is 2.32 for a dominant magnetic field and 2.62 for a dominant buoyancy force. The current research's conclusions will help optimize the operation of various thermal engineering systems, including electronic devices, where the improved heat removal rate will keep the electronic components at a safe operating temperature.

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Section: Introductionmentioning

confidence: 99%

Ferrohydrodynamics Mixed Convection of a Ferrofluid in a Vertical Channel with Porous Blocks of Various Shapes

2023

JAFM

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“…Pati et al 22 researched the critical analysis of forced convective heat transfer on permeable media. The impact on permeable media and swirling flow to triple coaxial divisions increase diffusion flame in the temperature is marked by Kotb et al 23 Alsedais et al 24 have inspected mixed convection on the nanofluid composed of a permeable cavity with the help of heat generation and radiative.…”

Section: Introductionmentioning

confidence: 99%

Cross-diffusion of the stagnation-point solar radiated micropolar liquid flow through a convected surface

Kumar

Obulesu

2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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The aim of the present analysis was to the best part of the effect of a magnetohydrodynamic micropolar fluid over the convective surface boundary condition into cross-diffusion and linear radiative heats were assumed. The impact on chemical reaction and viscous dissipation is considered. This governing equation about flow fields was transformed with a non-dimensional design to apply relevant correlation variables. That ODE was defined with the bvp4c method. This result is entrusted into plots and tables about the consequence of diverse flow variables in the flow fields. They observed into appreciative temperature in the increase in the Dufour number, although the unfavorable force was recognized in the Richardson number. It was noticed that the higher velocity was placed on the Newtonian liquid on difference into that micropolar liquid. Concentration was the reducing function on chemical reaction parameters and Schmidt number.

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“…The results reveal that the inclination significantly impacts the heat transfer rate and entropy production. Alsedais et al [34] examined the influence of radiation and heat generation on MHD mixed convection of a nanofluid in an inclined undulating porous cavity containing an obstacle. Choudhary and Ray [35] worked on a porous-corrugated enclosure containing a discrete heat source.…”

Section: Introductionmentioning

confidence: 99%

Mixed convection heat transfer of a nanofluid in a square ventilated cavity separated horizontally by a porous layer and discrete heat source

2023

Archives of Thermodynamics

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Laminar mixed convection heat transfer in a vented square cavity separated by a porous layer filled with different nanofluids (Fe3O4, Cu, Ag and Al2O3) has been investigated numerically. The governing equations of mixed convection flow for a Newtonian nanofluid are assumed to be two-dimensional, steady and laminar. These equations are solved numerically by using the finite volume technique. The effects of significant parameters such as the Reynolds number (10 ≤ Re ≤ 1000), Grashof number (10 3 ≤ Gr ≤ 10 6 ), nanoparticle volume fraction (0.1 ≤ φ ≤ 0.6), porous layer thickness (0 ≤ γ ≤ 1) and porous layer position (0.1 ≤ δ ≤ 0.9) are studied. Numerical simulation details are visualized in terms of streamline, isotherm contours, and average Nusselt number along the heated source. It has been shown that variations in Reynolds and Darcy numbers have an impact on the flow pattern and heat transfer within a cavity. For higher Reynolds (Re > 100), Grashof (Gr > 10 5 ) numbers and nanoparticles volume fractions the heat transfer rate is enhanced and it is optimal at lower values of Darcy number (Da = 10 −5 ). In addition, it is noticed that the porous layer thickness and location have a significant effect on the control of the heat transfer rate inside the cavity. Furthermore, it is worth noticing that Ag nanoparticles presented the largest heated transfer rate compared to other nanoparticles.

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Local thermal non-equilibrium condition on mixed convection of a nanofluid-filled undulating cavity containing obstacle and saturated by porous media

Cited by 14 publications

References 37 publications

Ferrohydrodynamics Mixed Convection of a Ferrofluid in a Vertical Channel with Porous Blocks of Various Shapes

Ferrohydrodynamics Mixed Convection of a Ferrofluid in a Vertical Channel with Porous Blocks of Various Shapes

Cross-diffusion of the stagnation-point solar radiated micropolar liquid flow through a convected surface

Mixed convection heat transfer of a nanofluid in a square ventilated cavity separated horizontally by a porous layer and discrete heat source

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