Forced Convection Heat Transfer from a Pair of Circular Cylinders Confined in Ventilated Enclosure

Helmaoui, Mustapha; Laidoudi, Houssem; Belbachir, Azzedine; Ayad, Adel; Ghaniam, Abedallah

doi:10.4028/www.scientific.net/df.26.104

Cited by 8 publications

(7 citation statements)

References 8 publications

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“…The heat transfer by forced convection from two equal circular cylinders located at the mid-section of cavity with a square shape was examined. The obtained results showed the augmentation in heat transfer rate with increasing the distance between cylinders (Helmaoui et al 2020). Laidoudi et al…”

Section: Introductionmentioning

confidence: 80%

3D Numerical Simulation of Turbulent Mixed Convection in a Cubical Cavity Containing a Hot Block

Bouras¹,

Bouabdallah²,

Ghernaout³

et al. 2021

JAFM

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The considerable quantities of heat transfer are dissipated during the operating electronic/electrical systems and have harmful effects on the operating time. So; to keep these systems in good working condition, the location of efficient mechanical cooling systems is essential. The heat transfer rate in an enclosure intensely depends on the combination of geometrical and physical parameters. For this purpose, a 3D Numerical simulation of turbulent mixed convection in a cubical cavity containing an internal heat source in its middle was carried out. The cavity has an inlet port at the lower left face area and an outlet port located in the upper right face area. The analyses are performed for air at ambient circumstances (Pr = 0.71) and the variation of interval for Richardson number (Ri) is chosen between 0.01 and 30 to investigate three situations: dominated forced convection, natural convection, and mixed convection for a fixed dimension of the enclosure in turbulent regimes (Gr = 10 9 ). The effects of the variation of Ri, the dimensionless time, and the dynamic parameters on the thermal flow and fluid flow phenomena are presented and discussed. The obtained results show an exchange between the forces of pressure and of buoyancy in the studied interval and a strong dependence between the geometrical parameters and the heat transfer rate, and then the correlations of the combination of the parameters were proposed.

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Section: Introductionmentioning

confidence: 80%

3D Numerical Simulation of Turbulent Mixed Convection in a Cubical Cavity Containing a Hot Block

Bouras¹,

Bouabdallah²,

Ghernaout³

et al. 2021

JAFM

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show abstract

Section: Introductionmentioning

confidence: 94%

“…The analysis of the thermal convection is done by the application of the three fundamental laws of conservation (conservation of the mass, the momentum, and the energy). The differential formulation of these equations is as follows (Helmaoui et al [6]):…”

Section: General Equationsmentioning

confidence: 99%

3D Forced Convection in a Box Containing Two Cylindrical Heat Sources

Bouabdallah¹,

Ghernaout²,

Bellaouar³

et al. 2020

AMA_B

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Forced convection is a special type of heat transfer in which fluids are forced to move, in order to increase the heat transfer. The aim of this study is to investigate in a numerical simulation of forced convection in a cubic cavity containing two cylindrical heat sources in the middle. The cavity is subjected to an inflow of air inlet from the left and an outlet flow from the right side with the same dimensions of the opening doors (0.1 H). The walls of the cavity are maintained adiabatic. The conservation equations governing the flow of forced convection are solved using the finite volume method that is used by FLUENT –ANSYS Software. Also, a comparison was performed shows good agreement between the numerical results with those available in the literature (numerical, analytical and experimental). The effect of the dimension of cavity (number of Rayleigh) and the velocity of ventilation of the air (number of Reynolds), as well as the dimension between sources cylindrical are presented and discussed. The results obtained show a strong dependence between the geometrical conditions and the structure of the dynamic and thermal field of the flow of forced convection.

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“…Most of these studies focus on the study of an open room [ 11 , 12 , 13 ], with a wavy shape then inserted between the room’s walls [ 14 , 15 , 16 , 17 ]. In order to improve the thermal transfer process between the inner obstacle and the flow, different shapes have been tested, such as triangular [ 18 , 19 ], square [ 20 , 21 ] and hexagonal [ 22 ] forms.…”

Section: Introductionmentioning

confidence: 99%

Lid-Driven Chamber with 3D Elliptical Obstacle under the Impacts of the Nano-Properties of the Fluid, Lorentz Force, Thermal Buoyancy, and Space Porosity

et al. 2022

Self Cite

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In this work, we have performed an investigation to increase our understanding of the motion of a hybrid nanofluid trapped inside a three-dimensional container. The room also includes a three-dimensional heated obstacle of an elliptic cross-section. The top wall of space is horizontally movable and adiabatic, while the lower part is zigzagged and thermally insulated as well. The lateral walls are cold. The container’s space is completely replete with Al2O3-Cu/water; the concentration of nanoparticles is 4%. The space is also characterized by the permeability, which is given by the value of the Darcy number (limited between 10−5 and 10−2). This studied system is immersed in a magnetic field with an intensity is defined in terms of Hartmann number (limited between 0 and 100). The thermal buoyancy has a constant impact (Gr = 1000). This study investigates the influences of these parameters and the inclination angle of the obstacle on the heat transfer coefficient and entropy generation. The Galerkin finite element method (GFEM) was the principal technique for obtaining the solution of the main partial equations. Findings from our work may be exploited to depict the conditions for which the system is effective in thermal cooling and the case in which the system is effective in thermal insulation.

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Forced Convection Heat Transfer from a Pair of Circular Cylinders Confined in Ventilated Enclosure

Cited by 8 publications

References 8 publications

3D Numerical Simulation of Turbulent Mixed Convection in a Cubical Cavity Containing a Hot Block

3D Numerical Simulation of Turbulent Mixed Convection in a Cubical Cavity Containing a Hot Block

3D Forced Convection in a Box Containing Two Cylindrical Heat Sources

Lid-Driven Chamber with 3D Elliptical Obstacle under the Impacts of the Nano-Properties of the Fluid, Lorentz Force, Thermal Buoyancy, and Space Porosity

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