Heat transfer enhancement by a circumferentially non-uniform array of longitudinal fins assembled inside a circular channel

Hajmohammadi, M.R.; Doustahadi, A.; Ahmadian-Elmi, M.

doi:10.1016/j.ijheatmasstransfer.2020.120020

Cited by 18 publications

(2 citation statements)

References 28 publications

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“…The results showed that increasing the slot number and size can reduce the bulging value. Hajmohammadi et al analysed the heat exchange capacity of array ns in a circular channel [16]. The results showed that the heat exchange capacity of a nonuniform n structure can be increased by 46% compared with that of a traditional channel.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the circumferential bulging capacity and uniformity under different TEC layout and the roll structure in the ETCR

Hai²,

Yang³

et al. 2022

Preprint

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Electronic temperature control roll (ETCR) technology is a new roll profile control technology based on the principle of the semiconductor cooling and heating effect. The thermoelectric cooler (TEC) is the core component for controlling roll profiles in this technology. The TEC layout and the roll structure can affect the bulging ability of the roll, the bulging uniformity and the uniformity of the roll temperature field. To research the influence of the TEC layout and the roll structure on these factors, a circumferential finite element model of ETCR is established by the finite element software MSC.MARC, and is verified on the experimental platform of ETCR. After analysis, it was found that increasing the roll diameter or decreasing the diameter of the roll inner hole can increase the bulging ability of the roll, improve the bulging uniformity and weaken the temperature ratchet. Increasing the temperature of TEC or decreasing the single piece influence angle can increase the bulging ability of the roll and improve the temperature ratchet, while the effect of changing the single piece influence angle on the bulging uniformity is larger than that of the temperature of TEC. In view of the difficulty of circumferential uniform bulging when the single piece influence angle is large, a scheme of adding a metal layer of high thermal conductivity material in the roll inner hole is proposed. The results showed that the copper layer has little influence on the bulging ability of the roll and can reduce the circumferential bulging difference.

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Section: Introductionmentioning

confidence: 99%

Analysis of the circumferential bulging capacity and uniformity under different TEC layout and the roll structure in the ETCR

Hai²,

Yang³

et al. 2022

Preprint

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“…The geometry of the fin plays a key role in improving the overall performance that needs to enhance the efficiency of the fin. Several researchers, including [1][2][3][4][5] have examined several fins shapes for the longitudinal and annular fins and optimized the thermal performance of these fins. Porous fins have been widely used as a viable thermal candidate for effective cooling.…”

Section: Introductionmentioning

confidence: 99%

Application of Metaheuristic Algorithms for Optimizing Longitudinal Square Porous Fins

Atawneh¹,

Khan²,

Hamadneh³

et al. 2021

Computers, Materials &Amp; Continua

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The objectives of this study involve the optimization of longitudinal porous fins of square cross-section using metaheuristic algorithms. A generalized nonlinear ordinary differential equation is derived using Darcy and Fourier's laws in the energy balance around a control volume and is solved numerically using RFK 45 method. The temperature of the base surface is higher than the fin surface, and the fin tip is kept adiabatic or cooled by convection heat transfer. The other pertinent parameters include Rayleigh number (100 ≤ Ra ≤ 10 4 ), Darcy number, (10 −4 ≤ Da ≤ 10 −2 ), relative thermal conductivity ratio of solid phase to fluid (1000 ≤ k r ≤ 8000), Nusselt number (10 ≤ Nu ≤ 100), porosity (0.1 ≤ φ ≤ 0.9). The impacts of these parameters on the entropy generation rate are investigated and optimized using metaheuristic algorithms. In computer science, metaheuristic algorithms are one of the most widely used techniques for optimization problems. In this research, three metaheuristic algorithms, including the firefly algorithm (FFA), particle swarm algorithm (PSO), and hybrid algorithm (FFA-PSO) are employed to examine the performance of square fins. It is demonstrated that FFA-PSO takes fewer iterations and less computational time to converge compared to other algorithms.

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Curvature induced instability characteristics of laminar flow and heat transfer through a bent square channel

Hasan

Mondal

Lorenzini

2022

Chinese Journal of Physics

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Heat transfer enhancement by a circumferentially non-uniform array of longitudinal fins assembled inside a circular channel

Cited by 18 publications

References 28 publications

Analysis of the circumferential bulging capacity and uniformity under different TEC layout and the roll structure in the ETCR

Analysis of the circumferential bulging capacity and uniformity under different TEC layout and the roll structure in the ETCR

Application of Metaheuristic Algorithms for Optimizing Longitudinal Square Porous Fins

Curvature induced instability characteristics of laminar flow and heat transfer through a bent square channel

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