The effect of bend angle on pressure drop and flow behavior in a corrugated duct

Du, Xuzhi; Wei, Anning; Fang, Yuhao; Yang, Zhigang; Wei, Daniel; Lin, Chao–Hsin; Jin, Zheyan

doi:10.1007/s00707-020-02716-5

Cited by 17 publications

(3 citation statements)

References 28 publications

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“…According to the results of a number of studies, the geometry of the fin has a significant impact on the thermal and hydraulic characteristics of the heat sink [28]. As evidenced by the results of the study [29], changing the geometry of the fins-for example, their corrugation-can result in a sharp increase in the pressure drop.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Thermal and Hydraulic Characteristics of Plate-Fin Heat Sinks

Soloveva,

Solovev,

Shakurova

2024

Processes

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One of the main trends in the development of the modern electronics industry is the miniaturization of electronic devices and components. Miniature electronic devices require compact cooling systems that can dissipate large amounts of heat in a small space. Researchers are exploring ways to improve the design of the heat sink of the cooling system in such a way that it increases the heat flow while at the same time reducing the size of the heat sink. Researchers have previously proposed different designs for heat sinks with altered fin shapes, perforations, and configurations. However, this approach to optimizing the design of the heat sink results in an increase in the labor intensity of its production. Our goal is to optimize the heat sink design to reduce its size, reduce metal consumption, and increase heat flow. This goal is achieved by changing the number of fins and the distance between them. In this case, there is no significant difference in the geometry of a conventional plate-fin heat sink, and a low labor intensity of production is ensured. A numerical investigation of heat flow and pressure drop in models of plate-fin heat sinks of various sizes and metal volumes was conducted using the ANSYS Fluent software package (v. 19.2) and computational fluid dynamics employing the control volume method. We used the SST k-ω turbulence model for the calculations. The research results showed that by changing the number of fins and the distance between them, it is possible to increase the heat flow from the heat sink to 24.44%, reduce its metal consumption to 6.95%, and reduce its size to 30%. The results of this study may be useful to manufacturers of cooling systems who seek to achieve a balance between the compactness of the heat sink and its ability to remove large amounts of heat.

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Section: Introductionmentioning

confidence: 99%

Numerical Study of the Thermal and Hydraulic Characteristics of Plate-Fin Heat Sinks

Soloveva,

Solovev,

Shakurova

2024

Processes

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“…Direct numerical simulations of turbulent flow in a 90 • pipe bend at Re = 5300 were performed by Wang et al [16] to investigate flow oscillation frequencies downstream of the bend and by Hufganel et al [17] for flow at Re = 11,700 to study the nature of the three-dimensional wave-like structure that is responsible for the low-frequency switching affecting the Dean vortices downstream of the pipe bend and causing the fatigue of the pipe system. More recently, Du et al [18] employed a LES turbulence model together with the proper orthogonal decomposition method to investigate the effects of varying the bend angle on pressure drop and mean flow characteristics in a small-diameter corrugated pipe. They found that increasing the bend angle from 0 • to 90 • produces stronger Dean vortices and increased pressure drops downstream of the pipe bend.…”

Section: Introductionmentioning

confidence: 99%

Smoothed Particle Hydrodynamics Simulations of Water Flow in a 90° Pipe Bend

Sigalotti

Alvarado-Rodríguez

Klapp

et al. 2021

Water

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The flow through pipe bends and elbows occurs in a wide range of applications. While many experimental data are available for such flows in the literature, their numerical simulation is less abundant. Here, we present highly-resolved simulations of laminar and turbulent water flow in a 90° pipe bend using Smoothed Particle Hydrodynamics (SPH) methods coupled to a Large-Eddy Simulation (LES) model for turbulence. Direct comparison with available experimental data is provided in terms of streamwise velocity profiles, turbulence intensity profiles and cross-sectional velocity maps at different stations upstream, inside and downstream of the pipe bend. The numerical results are in good agreement with the experimental data. In particular, maximum root-mean-square deviations from the experimental velocity profiles are always less than ∼1.4%. Convergence to the experimental measurements of the turbulent fluctuations is achieved by quadrupling the resolution necessary to guarantee convergence of the velocity profiles. At such resolution, the deviations from the experimental data are ∼0.8%. In addition, the cross-sectional velocity maps inside and downstream of the bend shows that the experimentally observed details of the secondary flow are also very well predicted by the numerical simulations.

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“…No obstante, también son bastante utilizados los otros cambios de dirección llamados "codos", pero merecen una revisión por separado (Kast, 2010;Zmrhal & Schwarzer, 2021, Instituto Mexicano de Tecnología del Agua Open Access bajo la licencia CC BY-NC-SA 4.0 (https://creativecommons.org/licenses/by-nc-sa/4.0/) 2009). Por último, en efecto que las curvas de tuberías son ampliamente utilizadas en los sistemas hidráulicos, se han llevado a cabo diversas investigaciones sobre las pérdidas de energía que éstas generan, las cuales no han cesado en los últimos años, como se puede constatar en los trabajos de: Dang, Yang, Yang e Ishii, (2018); Daneshfaraz, Rezazadehjoudi y Abraham (2018); Reghunathan, Son, Suryan y Kim (2019); Friman y Levy (2019); Tripathi, Portnikov, Levy & Kalman (2019); Du et al (2020); Arun, Kumaresh, Natarajan y Kulasekharan (2020); Jia y Yan, (2020). Sin embargo, estas investigaciones recientes se basan en resultados de modelos computacionales, que generalmente se validan contra resultados experimentales de modelos físicos, siendo estos últimos los que analizarán en el presente estudio.…”

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Una revisión de las metodologías para estimar el coeficiente de pérdidas en curvas de tuberías bajo flujo turbulento

Villegas-León¹,

López-Lambraño²,

Fuentes

et al. 2021

Tecnol. cienc. agua

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The effect of bend angle on pressure drop and flow behavior in a corrugated duct

Cited by 17 publications

References 28 publications

Numerical Study of the Thermal and Hydraulic Characteristics of Plate-Fin Heat Sinks

Numerical Study of the Thermal and Hydraulic Characteristics of Plate-Fin Heat Sinks

Smoothed Particle Hydrodynamics Simulations of Water Flow in a 90° Pipe Bend

Una revisión de las metodologías para estimar el coeficiente de pérdidas en curvas de tuberías bajo flujo turbulento

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