Effects of the center of linear heating position on natural convection and entropy generation in a linearly heated square cavity

Şahin, Birol

doi:10.1016/j.icheatmasstransfer.2020.104675

Cited by 26 publications

(4 citation statements)

References 60 publications

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“…This generates the transport of energy from one area to another. The study of how thermal boundary conditions affect natural convection is a subject widely investigated by researchers across various fields, particularly in the context of square cavities, 4 rectangular shape, 5,6 and triangular cavities, 7 with a constant heat source, 8 sometimes for cavities filled with nanofluid, [9][10][11] in addition in the presence of a magnetic field source, 12 with different heating sizes 13 even for porous media, 14 with entropy generation, [15][16][17] complex geometry (wavy wall), 18 or inclined wall. 19 The results show that the latter can effectively control heat distribution, fluid circulation, velocities, and Nusselt number, resulting in improved performance of industrial processes.…”

Section: Introductionmentioning

confidence: 99%

Fluid‐structure interaction study of an oscillating heat source effect on the natural convection flow

Tarek,

Elhadj,

Mohammad

et al. 2024

Heat Trans

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The objective of this paper is to investigate fluid‐structure interaction (FSI) within conjugate natural convection. An oscillating fin, featuring a heat source placed at different locations, is examined using the Arbitrary Lagrangian–Eulerian formulation. The Galerkin finite element method is utilized to solve nonlinear dimensionless equations. Verification of grid independence is conducted and the model undergoes validation. Simulation outcomes for three fin positions (left, center, and right) and three heat source locations (bottom, middle, and top) are presented, illustrating streamlines, isotherms, and the average Nusselt number. The governing equations and boundary conditions are addressed using the finite element method. Temperature profiles in four scenarios are analyzed, along with horizontal velocities at different levels (0, D/2, D from the bottom wall). Dimensionless time (10−5 ≤ t ≤ 3), Ra = 106, Kr = 10, E = 1011 are used as parameters. The impact of the heat source position on vibratory motion is evaluated through Nusselt number variation, affecting heat exchange in different cases. The results show that heat transfer is minimal for a source location at the center of the fin (c). These findings also offer insights into FSI applications in economics and industry, guiding practical design considerations. Additionally, coupling the vibratory motion of the heat source with the flexible oscillating fin at the same frequency enhances understanding of the system.

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Section: Introductionmentioning

confidence: 99%

Fluid‐structure interaction study of an oscillating heat source effect on the natural convection flow

Tarek,

Elhadj,

Mohammad

et al. 2024

Heat Trans

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“…Particularly noteworthy is the outcome observed when the right wall's temperature rises linearly and the left wall's temperature diminishes linearly, resulting in the formation of two flow cells within the enclosure, one at the bottom and the other at the top. Additionally, [15], demonstrated the impact of the linear position of heating on entropy creation due to free convection in a square cavity. Their findings highlighted that the position of the linear heating center significantly influences both heat transfer and entropy creation resulting from natural convection.…”

Section: Introductionmentioning

confidence: 99%

The Influence of linear Heating on Free Convection in a Cylindrical Enclosure

Mazgar,

Faycal

2023

1790-5044

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The current study aims to numerically investigate free convection airflow within a horizontal cylinder with a linearly heated side wall. The computation of heat transfer and fluid flow structure has been carried out using the finite element software COMSOL Multiphysics. The influence of the heat source position on fluid flow and heat transfer is inspected. Special attention is paid to the effect of Rayleigh number and the heater position on energy efficiency within the cavity. The results indicate that the best heat transfer performance is achieved for low Rayleigh numbers and when the active wall is centered in the vicinity of 90°.

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“…Importance of such flows in various configurations encouraged researcher to dig-out more applications in this direction under different situation. Recently, Şahin (2020) studied the entropy generation in a free convective flow in squared enclosure and found that different linearly heated source greatly effect entropy generation. Zhou et al (2020) investigated the significance of periodic thermal impact on natural convective flow configuration in squared container.…”

Section: Introductionmentioning

confidence: 99%

Simulations of micropolar nanofluid-equipped natural convective-driven flow in a cavity

Ullah

Nadeem

McCash

et al. 2021

HFF

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Purpose This paper aims to focus on the natural convective flow analysis of micropolar nanofluid fluid in a rectangular vertical container. A heated source is placed in the lower wall to generate the internal flow. In further assumptions, the left/right wall are kept cool, while the upper and lower remaining portions are insulated. Free convection prevails in the regime because of thermal difference in-between the lower warmer and upper colder region. Design/methodology/approach The physical setup owns mathematical framework in-terms of non-linear partial differential equations. For the solution purpose of the differential system, finite volume method is adopted. The interesting features of the flow along with thermal transportation involve both translational and rotational movement of fluid particles. Findings Performing the simulations towards flow controlling variables the outputs are put together in contour maps and line graphs. It is indicated that the variations in flow profile mass concentration and temperature field augments at higher Rayleigh parameter because of stronger buoyancy effects. Higher viscosity coefficient implies decrease in flow and thermal transportation. Further, the average heat transfer rate also grows by increasing both the Rayleigh parameter and heated source length. Originality/value To the best of the authors’ knowledge, no such study has been addressed yet. Further, the results are validated by comparing with previously published work.

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Effects of the center of linear heating position on natural convection and entropy generation in a linearly heated square cavity

Cited by 26 publications

References 60 publications

Fluid‐structure interaction study of an oscillating heat source effect on the natural convection flow

Fluid‐structure interaction study of an oscillating heat source effect on the natural convection flow

The Influence of linear Heating on Free Convection in a Cylindrical Enclosure

Simulations of micropolar nanofluid-equipped natural convective-driven flow in a cavity

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