Heat transfer in trapezoidal microchannels of various aspect ratios

McHale, John P.; Garimella, Suresh V.

doi:10.1016/j.ijheatmasstransfer.2009.09.020

Cited by 95 publications

(25 citation statements)

References 35 publications

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“…At the same Reynolds number, the pressure drop of TEC is much lower compared with that of SRC. Based on previous studies, 14 15 the flow characteristics are dramatically influenced by the shape of channel cross section. For the rectangular channel, the aspect ratio is the main parameter that affects the flow characteristics.…”

Section: Resultsmentioning

confidence: 99%

Flow and Thermal Performance of a Water-Cooled Periodic Transversal Elliptical Microchannel Heat Sink for Chip Cooling

Wei¹,

Yang²,

Wang³

et al. 2015

j nanosci nanotechnol

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Flow and thermal performance of transversal elliptical microchannels were investigated as a passive scheme to enhance the heat transfer performance of laminar fluid flow. The periodic transversal elliptical micro-channel is designed and its pressure drop and heat transfer characteristics in laminar flow are numerically investigated. Based on the comparison with a conventional straight micro- channel having rectangular cross section, it is found that periodic transversal elliptical microchannel not only has great potential to reduce pressure drop but also dramatically enhances heat transfer performance. In addition, when the Reynolds number equals to 192, the pressure drop of the transversal elliptical channel is 36.5% lower than that of the straight channel, while the average Nusselt number is 72.8% higher; this indicates that the overall thermal performance of the periodic transversal elliptical microchannel is superior to the conventional straight microchannel. It is suggested that such transversal elliptical microchannel are attractive candidates for cooling future electronic chips effectively with much lower pressure drop.

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Section: Resultsmentioning

confidence: 99%

Flow and Thermal Performance of a Water-Cooled Periodic Transversal Elliptical Microchannel Heat Sink for Chip Cooling

Wei¹,

Yang²,

Wang³

et al. 2015

j nanosci nanotechnol

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“…Following this, many researchers have tried to investigate friction and convective heat transfer characteristics in microchannels experimentally [13][14][15] as well as numerically [16,17]. Work on various microchannel geometries has been extensively reviewed in [18][19][20]. The concept of microchannel cooling was further extended by Vafai and Zhu [21] from single layer to double layer microchannel, which consisted of two layers of heat sink to minimize temperature variations in the substrate.…”

Section: Advances In Mechanical Engineeringmentioning

confidence: 99%

Numerical Study on the Performance of Double Layer Microchannel with Liquid Gallium and Water

Sharma

Garg

Singh

et al. 2013

Advances in Mechanical Engineering

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The performance of liquid gallium and water in the double layer microchannel has been analysed using three-dimensional conjugate heat transfer analysis. The effect of flow rate on the counter and parallel arrangement of each fluid is studied for three different lengths. Furthermore, cooling capability of liquid gallium and water is compared at the same length with flow rate and pumping power as governing parameters. The performance of fluid was judged on the basis of maximum temperature attained and minimal temperature variations at the heated region. Interesting results have been found showing the effect of specific heat on the type of arrangement for liquid gallium with similar observation for water for low Reynolds number and relatively longer length. Among liquid gallium and water, above certain pumping power use of liquid gallium is found to be favourable for a shorter length of the double layer microchannel. Furthermore, the range of flow rate and pumping power showing superior performance with water was found to increase with the length.

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“…These structures includes micro-channels with trapezoidal cross sections [37] [38], cross-linked micro-channels [39], micro-pin-fins [40] [41] [42], tree-shaped and serpentine structures [19] [43] [44] [45].…”

Section: Different Micro-channel Infrastructuresmentioning

confidence: 99%