Lattice Boltzmann Simulation of Magnethydrodynamics Natural Convection in an L-Shaped Enclosure

Mliki, Bouchmel; Abbassi, Mohamed Ammar; Omri, Ahmed

doi:10.18280/ijht.340403

Cited by 13 publications

(2 citation statements)

References 16 publications

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“…The effects of the scattering albedo, the wall emissivity, and conduction-radiation parameters on temperature distribution in the medium were tested and they noticed a good agreement result between CDM (Collapsed dimension method) and LBM. Mliki et al [12] used the lattice Boltzmann to simulate the magnet-hydro-dynamic (MHD) natural convection in an Lshaped enclosure. They went on to remark that the parameters of aspect ratio and Hartmann number reduced the free convection, otherwise, the heat transfer increased with augmentation of volume fraction.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation by the Lattice Boltzmann Method of the Natural Convective Flow in a Square Cavity Containing a Nanofluid

Benameur¹,

Elmir²,

Mebarki³

2022

IJHT

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In this work, Lattice Boltzmann Method (LBM) is used to study the heat transfer by natural convection of a nanofluid (Water-Al2O3) in a square cavity with D2Q9 scheme. This method is used to describe and analyze the flow of nanofluid by convection in a differentially heated cavity. The horizontal walls of the cavity are adiabatic, while the right and left sides are with cold and hot constant temperature, respectively. The macroscopic variables which characterize the flow and the heat transfer by convection (temperature and two components of the velocity) are determined from the mesoscopic variable (distribution functions). The results of this study show the influence of the Rayleigh number and the volume fraction of the nanoparticles on the flow structure and the average Nusselt number. Two correlations of the maximum vertical velocity and the average Nusselt number with Rayleigh number and volume fraction are envisaged.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation by the Lattice Boltzmann Method of the Natural Convective Flow in a Square Cavity Containing a Nanofluid

Benameur¹,

Elmir²,

Mebarki³

2022

IJHT

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“…Thus, the two colder regions in the upper part move from the left to the right with the right one gradually vanishing and the left one expanding as the lid moves rightward and continually. Recently Mliki et al [20] studied laminar natural convection of Al2O3-H2O nanofluid in L-shaped cavity in the presence of a uniform magnetic field numerically by the Lattice Boltzmann Method.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of mixed convection and flow pattern in various across-shape concave enclosures

Messaoud¹,

Meziani²,

Sadaoui³

2017

IJHT

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Numerical study has been performed to investigate the combined effects of lid movement and buoyancy on flow and heat transfer characteristics for the mixed convective flow inside a lid-driven arc-shape cavity. The work is motivated by its immense importance due to its wide range of applications. The numerical simulations, therefore, are performed for three different shape concave enclosures (rectangular, circular and triangular) in laminar flow regime and for different Reynolds numbers (10 ≤ Re ≤ 1000) and Grashof numbers (10 4 ≤ Gr ≤ 10 7 ) effects on the flow and heat transfer. Numerical results are presented in terms of streamlines, isotherms, velocity profiles and average Nusselt number along the bottom wall. The comparisons showed that the increase of Reynolds and Grashof numbers enhance the heat transfer for all forms of alveolus. Further, triangular alveolus highlights a higher heat transfer rate for higher Re numbers.

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3D Rayleigh‐Bénard‐type natural convection in MWCNT‐nanofluid‐filled L‐shaped enclosures with consideration of aggregation effect

Almeshaal

Maatki

Kolsi

et al. 2020

Math Methods in App Sciences

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Rayleigh‐Bénard type convective heat transfer in a 3D L‐shaped enclosure filled with multiwalled carbon nanotube (MWCNT)‐water nanofluids has been studied. The governing equations have been written using the vorticity‐vector potential formalism and solved based on the finite volume method (FVM). The simulations were performed for various values of Rayleigh number, aspect ratio, and MWCNT volume fraction. The aggregation effect was considered, and the viscosity and thermal cavity were evaluated accordingly to fit with the experimental properties. The heat transfer is enhanced by increasing MWCNT volume fraction. The aspect ratio is found to be an optimization parameter of heat transfer especially for low Ra values. The aspect ratio equal to 0.4 provides the highest heat transfer for fraction nanofluid less than 3% and Ra number less than 105. Increasing the aspect ratio and fraction nanofluid enhances of the 3D character.

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Lattice Boltzmann Simulation of Magnethydrodynamics Natural Convection in an L-Shaped Enclosure

Cited by 13 publications

References 16 publications

Numerical Simulation by the Lattice Boltzmann Method of the Natural Convective Flow in a Square Cavity Containing a Nanofluid

Numerical Simulation by the Lattice Boltzmann Method of the Natural Convective Flow in a Square Cavity Containing a Nanofluid

Numerical study of mixed convection and flow pattern in various across-shape concave enclosures

3D Rayleigh‐Bénard‐type natural convection in MWCNT‐nanofluid‐filled L‐shaped enclosures with consideration of aggregation effect

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