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首页> 外文期刊>International Journal of Heat and Mass Transfer >Evaporation and wetting behavior of silver-graphene hybrid nanofluid droplet on its porous residue surface for various mixing ratios
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Evaporation and wetting behavior of silver-graphene hybrid nanofluid droplet on its porous residue surface for various mixing ratios

机译：蒸发和润湿行为对其多孔残留物表面的各种混合比例的蒸发和润湿行为

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摘要

Droplet evaporation offers high heat rejection rates and is widely used in the form of spray cooling or dropwise cooling of various heat dissipating devices. However, due to the limiting heat flux removal capacity of conventional fluids, such as water, these cannot be used in thermal management of high heat flux devices. In this research, the evaporation of silver (Ag)-graphene (GNP) hybrid nanofluid droplet and its residue effects on the evaporation of following Ag-GNP hybrid nanofluid droplet, due to its synergistic thermal properties, is experimentally investigated for various mixing ratios, from MR-1 (0.1(Ag):0.9(GNP)) to MR-5 (0.9(Ag):0.1(GNP)), and different residue sizes. A theoretical model is also proposed for hybrid nanofluid droplet evaporation and semi-empirical relations are developed to estimate the hybrid nanofluid droplet spreading over its residue surface. The results show a substantial increase in the droplet evaporation rate with increasing residue size and decreasing mixing ratio. MR-1 hybrid nanofluid droplet gives the highest evaporation rate (up to 370%) on its highly wetted residue surface, while the evaporation rate significantly drops moving from MR-2 to MR-5 hybrid nanofluid droplets on their partially wetted residue surfaces. Moreover, the evaporation rate substantially increases (up to 240%) with increasing residue size for MR-1 hybrid nanofluid droplet resting on its residue surface, however, the effect of residue size on droplet evaporation rate considerably diminishes moving from MR-2 to MR-5 hybrid nanofluid droplets resting on their respective residues.
机译：液滴蒸发提供高热量抑制率，广泛用于各种散热装置的喷雾冷却或滴加的形式。然而，由于限制了常规流体的热通量去除能力，例如水，这些不能用于高热量装置的热管理。在该研究中，通过其协同热性能，对诸如协同热性能的蒸发蒸发的银（Ag）杂交纳米流体液滴及其残余物效应是针对各种混合比的实验研究，从MR-1（0.1（AG）：0.9（GNP））至MR-5（0.9（AG）：0.1（GNP））和不同的残留尺寸。还提出了一种理论模型，用于杂交纳米流体液滴蒸发，开发了半实证关系，以估计在其残留表面上扩散的杂化纳米流体液滴。结果表明，随着残留物尺寸的增加和混合比率降低，液滴蒸发速率显着增加。 MR-1杂交纳米流体液滴在其高湿的残留物表面上蒸发速率（高达370％），而蒸发速率显着下降到其部分湿润的残留物表面上的MR-5杂交纳米流体液滴。此外，蒸发速率随着在其残留物表面上搁置的残余物尺寸的增加而增加（高达240％），然而，对于其残留物表面，残留量大小对液滴蒸发速率的影响显着减少了从MR-2转移到MR -5杂种纳米流体液滴在其各自的残留物上休息。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2020年第6期|119618.1-119618.13|共13页
  • 作者

    F.R. Siddiqui; C.Y. Tso; S.C. Fu; H.H. Qiu; Christopher Y.H. Chao;

  • 作者单位

    Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and Technology Hong Kong;

    School of Energy and Environment City University of Hong Kong Hong Kong;

    Department of Mechanical Engineering The University of Hong Kong Pokfulam Road Hong Kong;

    Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and Technology Hong Kong;

    Department of Mechanical Engineering The University of Hong Kong Pokfulam Road Hong Kong;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Droplet evaporation; Wetting; Hybrid nanofluid; Porous residue; Droplet spreading;

    机译：液滴蒸发;润湿;杂交纳米流体;多孔残留物;液滴传播;

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