Study of Unsteady Flow Through and Around an Array of Isolated Square Cylinders

Fang, Yuhao; Yang, Zhigang; Ma, Yuan; Li, Qiliang; Du, Xuzhi

doi:10.1115/1.4048929

Cited by 4 publications

(1 citation statement)

References 41 publications

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“…Heat sinks that possess a lattice [11], two-layer [12], cone-column [13], and microchannel [14,15] structure are less prevalent. Porous materials [16] have great potential and, due to their developed surface area and tortuous current paths, have high thermal characteristics. They are already used in various industries as catalysts [17,18], filters [19], and thermal insulation [20,21].…”

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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Heat transfer and fluid flow around starfish-inspired cylinder by immersed boundary-simplified thermal lattice Boltzmann method

Mohebbi

Sheremet

2023

Engineering Analysis with Boundary Elements

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Analysis of the correlation between vegetated flow and suspended sediment using the drift flux model

Zhang,

Yin,

Wang

et al. 2024

Physics of Fluids

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We propose a model that integrates a drift flux model with a vegetation source term and the k−ω shear stress transport with improved delayed detached eddy simulation turbulence model to simulate sediment-laden vegetated flows. The numerical model was validated using experimental data from Lu [“Experimental study on suspended sediment distribution in flow with rigid vegetation,” Ph.D. thesis (Hohai University, Nanjing, Jiangsu, China, 2008)] and Wang and Qian [“Velocity profiles of sediment-laden flow,” Int. J. Sediment Res. 7, 27–58 (1992)]. We analyzed the vertical profile characteristics and spatial distribution features of sediment-laden vegetated flows at different vegetation densities. A detailed analysis was conducted on the correlations between variables that could affect the suspended sediment distribution, including vorticity, vertical velocity, Reynolds stress, and turbulent kinetic energy (TKE) fields. It was found that the vorticity field is primarily correlated with the suspended sediment concentration (SSC) field at the vegetation canopy, while the vertical velocity field above the canopy has a positive correlation with the SSC field. Both the Reynolds stress and TKE fields above the canopy exhibit positive correlations with the sediment concentration field. However, below the canopy, both fields show negative correlations with the sediment concentration. The TKE field is closely related to the suspended sediment distribution near the bottom, whereas the Reynolds stress field influences the suspended sediment distribution near the surface. The overall correlation between Reynolds stress and TKE with sediment concentration is negative, with their correlation significantly higher than that of vorticity and vertical velocity, indicating a closer connection with the movement of suspended sediments than the other variables.

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Study of Unsteady Flow Through and Around an Array of Isolated Square Cylinders

Cited by 4 publications

References 41 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

Heat transfer and fluid flow around starfish-inspired cylinder by immersed boundary-simplified thermal lattice Boltzmann method

Analysis of the correlation between vegetated flow and suspended sediment using the drift flux model

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