Computational study of thermal buoyancy from two confined cylinders within a square enclosure wifth single inlet and outlet ports

Laidoudi, Houssem; Makinde, Oluwole Daniel

doi:10.1002/htj.21932

Cited by 15 publications

(3 citation statements)

References 25 publications

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“…After that, another cold fluid passes around the hot chamber to cool it. This process allows the heated fluid to be cooled (Hajjar et al 2022;Laidoudi and Ameur 2022a;Albadr et al 2013;Laidoudi and Makinde 2021;Prabhanjan et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Shear-Thickening Fluid Through a Small-Scaled Heat Exchanger

Hamoudi,

Bouzit

2023

JSSCM

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This paper aims to predict the behavior of a complex fluid though a small-sized thermal exchanger. The fluid used is of shear-thickening type of power-law index (n = 1.4) and Prandtl number (Pr = 50). The Ostwald model was utilized to define the dynamic viscosity. The exchanger consists of three rectangular cross-section tubes placed inside a thermally insulated chamber. The enclosure contains two ports for the entry and exit of the complex fluid. The complex fluid enters the chamber from the first port at a constant speed and at a low temperature, and then it passes around the hot tubes to be cooled. The rheological behavior of a fluid is defined by Ostwald equation, while the intensity of thermal buoyancy was modeled by Boussinesq approximation. The results showed that the increase of the velocity of the flow at the entrance increases the instability of the flow. Increasing the intensity of thermal buoyancy reduces the cooling process of the hot upper body.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation Shear-Thickening Fluid Through a Small-Scaled Heat Exchanger

Hamoudi,

Bouzit

2023

JSSCM

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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

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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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“…Recently, a significant number of studies have appeared that study the thermal activity and the element affecting it for hot bodies trapped in closed room. Among these researches, there is a tendency to study the geometrical form of the system (El-Shorbagy et al 2021;Mostafa et al 2011;Ghasemi et al 2020;Selimefendigil et al 2015;Selimefendigil et al 2020;Laidoudi et al 2021c;Yang et al 2020). There are those who mainly care about the geometric shape of the trapped bodies, such as Zeitoun et al 2011;Laidoudi et al 2020a;Rashidi et al 2013;Laidoudi et al 2022a;and Mourad et al 2021.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Nanofluid Natural Convection Flow in a Cpu Heat Sink Using Buongiorno Tow-Phase Model

Anouar¹,

Mokhefi²

2022

JSSCM

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In this paper, a numerical investigation using the finite element method on the cooling capacity of an electronic heat sink has been presented. This heat sink is intended for cooling applications of micro-computer CPUs. It deals with a parallelepipedal block with rectangular fins, filled with a nanofluid and crossed by four cylindrical pipes in which a cooling gas flows and dissipates the heat generated by the processor. Indeed, the cooling occurs by three transfers: the first one evacuates the heat from the processor towards the gas, the second one transfers this heat towards the nanofluid and the last one is cooled from the ambient air by means of the fins laterally arranged on the block. From this work, it has been planned to contribute to the study of the behavior of a nanofluid in the heat sink in the presence of a uniform magnetic field in order to enhance the operating and cooling performances. The effects of some control parameters have been highlighted on the hydrodynamic, thermal, and mass behavior of the nanofluid, namely: the Rayleigh number (103 â‰¤ Ra â‰¤ 105), the Hartmann number (0 â‰¤ Ha â‰¤ 100), the angle of inclination of the magnetic field (0 â‰¤ Î³ â‰¤ 90Â°) and the nanoparticles diameter (1 nm â‰¤ dp â‰¤ 10 nm). On the other hand, a new fin design has been proposed in this study allowing the enhancement of the heat exchange rate with ambient medium. The studied phenomenon is governed by the equations of the two-phase nanofluid model proposed by Buongiorno and which describe the following balances: mass, momentum, energy and nanoparticles. The system of partial differential equations with initial-boundary conditions has been solved by the finite element method. After performing a mesh independence check and validating with previous papers, the results of the investigation were presented. They showed that the application of a magnetic field significantly reduces the rate of heat exchange. However, increasing the angle of inclination of this field promotes convective heat transfer. Moreover, the use of zigzag fins improves the cooling rate by about 4% for amplitude of 0.05 compared to the standard configuration.

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Computational study of thermal buoyancy from two confined cylinders within a square enclosure wifth single inlet and outlet ports

Cited by 15 publications

References 25 publications

Numerical Simulation Shear-Thickening Fluid Through a Small-Scaled Heat Exchanger

Numerical Simulation Shear-Thickening Fluid Through a Small-Scaled Heat Exchanger

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

Numerical Investigation of the Nanofluid Natural Convection Flow in a Cpu Heat Sink Using Buongiorno Tow-Phase Model

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