Enhanced flow uniformity in parallel mini-channels with pin-finned inlet header

Song, Jung-Youn; Hah, Seungryong; Kim, Deokjoo; Kim, Sung-Min

doi:10.1016/j.applthermaleng.2019.02.069

Cited by 32 publications

(5 citation statements)

References 35 publications

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“…Many other novel header designs [96,[100][101][102] have also been proposed and tested, as summarized in the review paper by Ghani et al [54]. Besides modifying the inlet/outlet header shapes, studies have been performed on adding obstacles inside the header to address the issue of flow maldistribution, including staggered pin-fin array (Figure 11a) [103], non-uniform-sized mini-inlet baffle (Figure 11b) [104,105], thin layers of porous media [106], and optimized manifold configurations (Figure 11c) [107]. The geometry of the heat sink channel has also been considered as a design parameter to adjust flow distribution.…”

Section: Flow Distribution Investigation/optimization On Parallel Str...mentioning

confidence: 99%

Design and Optimization of Heat Sinks for the Liquid Cooling of Electronics with Multiple Heat Sources: A Literature Review

Li,

Roux,

Castelain

et al. 2023

Energies

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This paper presents a detailed literature review on the thermal management issue faced by electronic devices, particularly concerning uneven heating and overheating problems. Special focus is given to the design and structural optimization of heat sinks for efficient single-phase liquid cooling. Firstly, the paper highlights the common presence and detrimental consequences of electronics overheating resulting from multiple heat sources, supported by various illustrative examples. Subsequently, the emphasis is placed on single-phase liquid cooling as one of the effective thermal management technologies for power electronics, as well as on the enhancement of heat transfer in micro/mini channel heat sinks. Various studies on the design and structural optimization of heat sinks are then analyzed and categorized into five main areas: (1) optimization of channel cross-section shape, (2) optimization of channel flow passage, (3) flow distribution optimization for parallel straight channel heat sinks, (4) optimization of pin-fin shape and arrangement, and (5) topology optimization of global flow configuration. After presenting a broad and complete overview of the state of the art, the paper concludes with a critical analysis of the methods and results from the literature and highlights the research perspectives and challenges in the field. It is shown that the issue of uneven and overheating caused by multiple heat sources, which is commonly observed in modern electronics, has received less attention in the literature compared to uniform or single-peak heating. While several design and structural optimization techniques have been implemented to enhance the cooling performance of heat sinks, topology optimization has experienced significant advancements in recent years and appears to be the most promising technology due to its highest degree of freedom to treat the uneven heating problem. This paper can serve as an essential reference contributing to the development of liquid-cooling heat sinks for efficient thermal management of electronics.

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Section: Flow Distribution Investigation/optimization On Parallel Str...mentioning

confidence: 99%

Design and Optimization of Heat Sinks for the Liquid Cooling of Electronics with Multiple Heat Sources: A Literature Review

Li,

Roux,

Castelain

et al. 2023

Energies

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“…Lim and Lee (2019) The channel with parallel and opposing flow directions. Song et al (2019) Flow-regulating distributor and collector with trapezoidal and rectangular fins. Tikadar et al (2019);…”

Section: Referencementioning

confidence: 99%

Tam Ve Parçali Si̇li̇ndi̇ri̇k Kanatçik Konfi̇gürasyonlarinin Bi̇r Mi̇ni̇kanalli Isi Alicinin Termohi̇droli̇k Performansi Üzeri̇ndeki̇ Etki̇leri̇

SARPER,

TÜRK,

DAĞIDIR

et al. 2023

KSU J. Eng. Sci.

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In this numerical investigation, the impacts of complete and partial cylindrical fin configurations on the thermohydraulic performance of a minichannel heatsink are studied. ANSYS Fluent software is used to conduct numerical analyses for four distinct mass flow rates ranging from 0.00265 kg/s to 0.0045 kg/s and three distinct fin positions. The effects of various configurations on velocity and temperature fields, average Nusselt number, Nusselt number ratio, friction coefficient, and performance evaluation coefficient are analyzed. According to the study’s findings, using partial cylindrical fins has a substantial impact on both heat transfer and pressure drop. When evaluating heat transfer, MCHS-R2a produces the greatest results, but this configuration greatly raises flow resistance. MCHS-R2c was found to have substantial potential when evaluated in terms of thermohydraulic performance.

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“…The determined tortuosity was 2.08 (À) within the current miniaturized packed segment. Contingent upon the simulation results, Zeiser et al 41 recommended a relationship to assure the dispersion coefficients inside a packed segment, represented by Equation (20).…”

Section: Velocity Distribution Modelmentioning

confidence: 99%

“…It was found that the presence of sharp corners, which act as the stagnation areas of a rectangular header, was the main reason for nonuniform flow distribution. Song et al20 mitigated the flow mal-distribution in a rectangular or trapezoidal header by installing 10 separate arrays and spacing of pin fins and proposed the best arrangement. Dabrowski 21 incorporated a small threshold (0.5 mm) in front of parallel channels in a header and observed that flow mal-distribution was decreased significantly.Kockmann22 stated that the milli-or micro-multichannel geometries in parallel orientations are more effective than their series.…”

mentioning

confidence: 99%

Mixing characteristics for the single and air‐water two‐phase flows in miniaturized parallel multichannel‐based devices

Mondal

Majumder

2022

AIChE Journal

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Investigation on the miniaturized parallel multichannel‐based devices packed with glass beads to improve the mass exchange execution is the critical focal point of the current study. One of the essential parameters to specify the miniaturized devices' flow distribution is the residence time distribution (RTD). In the present context, the RTDs of a liquid tracer were investigated for the air‐water multiphase flows (concurrent) across the multichannel‐based miniaturized devices (comprising of 11 similar dimensional parallel channels). The devices were variable in height and packed with glass beads. The conductivity estimations generated the RTD curves and were addressed by the axial dispersion model (ADM). The fluid‐flow rates differed within the range of 5–23 ml min−1. The axial dispersion coefficients and the rate of the specific energy dispersion were investigated. The effects of pressure difference and geometry on the hydrodynamic attributes and mixing properties were well‐illustrated, and the new correlations were suggested.

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Enhanced flow uniformity in parallel mini-channels with pin-finned inlet header

Cited by 32 publications

References 35 publications

Design and Optimization of Heat Sinks for the Liquid Cooling of Electronics with Multiple Heat Sources: A Literature Review

Design and Optimization of Heat Sinks for the Liquid Cooling of Electronics with Multiple Heat Sources: A Literature Review

Tam Ve Parçali Si̇li̇ndi̇ri̇k Kanatçik Konfi̇gürasyonlarinin Bi̇r Mi̇ni̇kanalli Isi Alicinin Termohi̇droli̇k Performansi Üzeri̇ndeki̇ Etki̇leri̇

Mixing characteristics for the single and air‐water two‐phase flows in miniaturized parallel multichannel‐based devices

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