Stepwise varying width microchannel cooling device for uniform wall temperature: Experimental and numerical study

Riera, Sara; Barrau, Jérôme; Omri, Mohamed; Fréchette, Luc; Rosell, Joan

doi:10.1016/j.applthermaleng.2014.12.012

Cited by 61 publications

(25 citation statements)

References 24 publications

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“…Riera et al, [16] numerically and experimentally studied the performance of the stepwise varying width microchannel cooling device. They found that the thermal performance of the microchannel cooling device is three-fold the performance of the minichannel for the same flow rate.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Heat Transfer in A Microchannel Heat Sink with Hourglass Channel Profile

Wong¹,

Chan²,

Goh³

2020

ARFMTS

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The present paper reports the numerical investigation of thermal and hydraulic performance of microchannel heat sink with hourglass profile (MCHS-HG). A 3-D conjugate heat transfer model was used to solve the problem with water as coolant and silicon as material of the heat sink. Performances of MCHS-HG were evaluated with 5 different contraction ratios, (0.2, 0.4, 0.6, 0.8 and 1.0) and 3 different aspect ratios from 4, 5 and 6 with Reynolds number in the range of 300-1800. Thermal performance of MCHS-HG was compared with microchannel heat sink with straight rectangular channel (MCHS-R). Results showed that thermal performance of MCHS-HG is better than MCHS-R for any given aspect ratio. The study on the effect of contraction ratio show that the optimum thermal performance is given by the contraction ratio of 0.4. Microchannel with narrower throat of hourglass profile gives higher pumping power. The assessment on thermal-hydraulic performance of MCHS-HG shows that the MCHS-HG is less economical to be applied as compare to MCHS-R.

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Section: Introductionmentioning

confidence: 99%

Numerical Study of Heat Transfer in A Microchannel Heat Sink with Hourglass Channel Profile

Wong¹,

Chan²,

Goh³

2020

ARFMTS

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“…Karathanassis et al, Riera et al, and Barrau et al numerically investigated the hydrothermal performance of MCs with stepwise varying width. They observed that variable‐width design exhibits superior overall performance when compared with fixed‐width MC configuration.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of heat transfer enhancement in wavy microchannel with tangential branched secondary channels

Kumar

Balasubramanian

Tiwari

et al. 2019

Asia-Pacific J Chem Eng

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Microchannel (MC) heat sinks have been extensively researched and used for thermal management. Wavy MC heat sinks and wavy MC with 45 o branched secondary channel heat sinks are shown in the literature to have superior heat transfer enhancement capabilities than straight MCs, with more pressure drop as penalty. To minimize the pressure drop, a new design is introduced in this paper by altering the wavy MC, with tangential branched secondary channels, at peaks and troughs of the wavy MC. Numerical investigation is carried out in the Reynolds number range of 100 to 300 with constant heat flux wall boundary condition. A simple parametric study on the secondary channel width is also carried out. Wavy MC with TBSC, having secondary channel width as half of the primary channel, is found to have the best combination of heat transfer and pressure drop performance, compared with wavy MC heat sinks and wavy MC with 45 o branched secondary channel heat sinks. The flow phenomenon that leads to such performance is carefully analyzed and discussed in detail in this paper.

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“…As a consequence, many papers and review articles are focused on enhanced microchannels (Dede and Liu, 2013;Khan and Fartaj, 2011;Naphon, Wiriyasart, and Wongwises, 2015) in order to deal with these drawbacks. Also other solutions, based on hybrid jet impingement/microchannel techniques have been proposed and tested experimentally (Barrau et al, 2010(Barrau et al, , 2012Riera et al, 2015;Sung and Mudawar, 2006). Such cooling schemes have demonstrated their capacity to obtain prefixed temperature profiles along the coolant flow path (even uniform) when tailoring at the design stage their internal geometry to the heat loads.…”

Section: Introductionmentioning

confidence: 99%

Impact of the Self-Adaptive Valve Behavior on an Array of Microfluidic Cells under Unsteady and Non-Uniform Heat Load Distributions

2019

JAFM

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Previous studies have demonstrated that the performance of a cooling scheme based on a matrix of microfluidic cells with self-adaptive valves under unsteady and non-uniform heat load scenarios improves in terms of pumping power and temperature uniformity, compared to the ones from conventional microchannels and hybrid jet impingement/microchannel cooling devices. The behavior of the thermally dependent self-adaptive valves varies as a function of some design parameters. In this work, the impact of the valve's characteristic curve on the cooling device is assessed to establish the basic rules for the valve design. The performance of a 3×3 microfluidic cell array is numerically studied under an unsteady and non-uniform heat load scenario. The results show that the valves which open at the most elevated temperature (control temperature of 90ºC) reduce by 15.5% the pumping power with respect to the valves opening at 60ºC, while improving by 25.0% the temperature uniformity and reducing both the overcooling and the fatigue.

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Stepwise varying width microchannel cooling device for uniform wall temperature: Experimental and numerical study

Cited by 61 publications

References 24 publications

Numerical Study of Heat Transfer in A Microchannel Heat Sink with Hourglass Channel Profile

Numerical Study of Heat Transfer in A Microchannel Heat Sink with Hourglass Channel Profile

Numerical investigation of heat transfer enhancement in wavy microchannel with tangential branched secondary channels

Impact of the Self-Adaptive Valve Behavior on an Array of Microfluidic Cells under Unsteady and Non-Uniform Heat Load Distributions

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