Mixed convection in complicated cavity with non-uniform heating on both sidewalls

Mekroussi, Said; Kherris, Sahraoui; Mebarki, Brahim; Benchattir, Ahmed

doi:10.18280/ijht.350439

Cited by 11 publications

(7 citation statements)

References 30 publications

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“…In order to describe heat and mass flows in porous media the authors in [21] employed a CVFEM technique. Others heated the side wall differentially [22][23][24][25][26] and the results were quite similar. Authors in [27] used heat generation.…”

Section: Introductionmentioning

confidence: 73%

A Numerical Investigation of the Free Flow in a Square Porous Cavity with Non-Uniform Heating on the Lower Wall

Mekroussi

Kherris

Zebbar

et al. 2022

Eng. Technol. Appl. Sci. Res.

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Natural convection in a steady state of incompressible air inside a cavity’s porous with a heated low wall of a sinusoidal profile is investigated numerically in this paper. The upper horizontal wall is kept cold while the two sides are thermally insulated. The proposed physical model was developed and studied with two-dimensional conditions, using the finite element method and adapting the Darcy-Brinkman model. This paper examines the laminar natural convection in a square porous cavity for different Rayleigh numbers (10 ≤ Ra ≤ 104), aspect ratios (0.25 ≤ AR ≤ 1.0), and sinusoidal temperature amplitude (0.25 ≤ λ ≤ 1.0). Moreover, the variation effect of Ra, AR, and λ on isotherms, streamlines, and the mean and local Nusselt numbers has been presented and analyzed. The results showed that an increase in the sinusoidal thermal amplitude, mean Nusselt number, and AR reduced somewhat the Rayleigh number. This provided a solution in which the mean Nusselt number increased by increasing the sinusoidal thermal amplitude and the Rayleigh number. On the other hand, it decreases slightly by increasing the AR. In addition, the convection transfer mechanism is the main mode when the Rayleigh number is high. Thus, it was found that the Darcy number also has an effect on heat transmission. The obtained results were compared with those found in the literature and were found to be in good accordance.

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Section: Introductionmentioning

confidence: 73%

A Numerical Investigation of the Free Flow in a Square Porous Cavity with Non-Uniform Heating on the Lower Wall

Mekroussi

Kherris

Zebbar

et al. 2022

Eng. Technol. Appl. Sci. Res.

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“…S. Mekroussi and al. [16] studied by numerical simulation the mixed air convection (Pr=0.71) in a cavity with corrugated walls. The influence of several control parameters on the flow such as the Richardson number, amplitude ratio and phase difference have been considered.…”

Section: Introductionmentioning

confidence: 99%

Effect of the position of the hot source on mixed convection in a rectangular cavity

Sereir

Missoum

MEBARKI

et al. 2022

Journal of Thermal Engineering

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This work presents a study by numerical simulation of mixed convection in a rectangular cavity with a sinusoidal temperature imposed on the right vertical wall while the other wall on the left is kept at a cold temperature. The upper and lower walls are thermally insulated, the inlet and outlet ports are respectively located on the hot wall to the bottom and on the top to the left. The enclosure represents a practical system such as an air-cooled electronic device, the heat source represents a radiator or an electronic component located in three different positions towards the left side at the bottom, the center and towards the right side at the top in such an enclosure. All calculations are made for a range of Richardson number from 0 to 10 and Reynolds numbers from 50 to 200. The influence of Richardson number, the position of the heat source and the influence of amplitude and phase deviation of the temperature imposed on the Nusselt number on the hot surface is studied. The results are presented in the form of streamlines and isotherms graphs as well as the variation in maximum temperature and mean Nusselt number under different conditions. The numerical resolution of the governing equations is obtained using the software of Multiphysics Comsol based on the finite element method.

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“…Satish and Mathur, [14] studied free and forced convection inside a rectangular enclosure with bottom heat source, for different ventilation arrangements. A numerically analyzed mixed convection in a complicated non-uniform (wavy walls) both side walls heated cavity using finite volume method with different parameters Richardson number (0.01-100),amplitude ratio(0<ɛ<1), phase deviation (0<ϕ<π) for Pr=0.71 was carried out by Mekroussi et al [15]. Rahman et al [16]studied mixed convection using finite element method inside a square cavity with inlet at the left edge of the vertical wall and top right vertical wall exit port.…”

Section: Introductionmentioning

confidence: 99%

Optimal Conditions of Natural and Mixed Convection in a Vented Rectangular Cavity with a Sinusoidal Heated Wall Inside with a Heated Solid Block

et al. 2021

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The present investigation deals with the natural, mixed and forced convection in a vented rectangular cavity having a sinusoidal heated vertical wall with a conducting solid block placed at one of the nine positions. The objective is to analyze numerically using finite element method the effects of the following parameters: inlet, outlet positions, solid square positions, thermal coefficient λ, amplitude ratio ɛ, phase deviation ϕ and the solid square size on the thermo-convective flows. The Richardson number is varied from 0 to 40, the Reynolds and Prandtl numbers are fixed respectively at 100 and 0.71. To quantify the heat transfer of the solid block and to get closer to real conditions, we have developed a modification based on the evaluation of the Nusselt number using the average temperature in the cavity, unlike previous works which used the input temperature. As results, the sinusoidal temperature at the right wall gives higher heat transfer enhancement. The variation of the phase deviation and amplitude ratio have a slightly effect on the average fluid temperature and average Nusselt at the right wall and at the square solid.

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Mixed convection in complicated cavity with non-uniform heating on both sidewalls

Cited by 11 publications

References 30 publications

A Numerical Investigation of the Free Flow in a Square Porous Cavity with Non-Uniform Heating on the Lower Wall

A Numerical Investigation of the Free Flow in a Square Porous Cavity with Non-Uniform Heating on the Lower Wall

Effect of the position of the hot source on mixed convection in a rectangular cavity

Optimal Conditions of Natural and Mixed Convection in a Vented Rectangular Cavity with a Sinusoidal Heated Wall Inside with a Heated Solid Block

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