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首页> 外文期刊>International Journal of Heat and Mass Transfer >Droplet evaporation and de-pinning in rectangular microchannels
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Droplet evaporation and de-pinning in rectangular microchannels

机译：矩形微通道中的液滴蒸发和去钉

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摘要

Experimental and numerical studies are presented for evaporation of micro-droplets of deionised (DI) water and toluene on lead zirconate titanate (PZT) substrates. The microchannels are fabricated with SU-8 2025 and 2075. The effects of channel width and depth on the evaporation and de-pinning rates of embedded micro-droplets are presented and compared for both fluids. The study reveals a partially hydrophobic nature of SU-8/PZT microchannel to DI water and a complete wetting when toluene is used as the droplet. The rate of evaporation of toluene is about double the rate of evaporation of DI water. Comparisons of the rates of evaporation and de-pinning show that the channel width has a larger effect on evaporation than the depth of the channel. The equivalent contact angle of the pinned film and bulk fluid compensated for the evaporation of the droplet. Surface roughness was also shown to have a significant effect on the pinned film in the rectangular microchannels.
机译：提出了在锆钛酸铅（PZT）基材上蒸发去离子（DI）水和甲苯的微滴的实验和数值研究。用SU-8 2025和2075制作了微通道。给出并比较了两种流体的通道宽度和深度对嵌入式微滴蒸发和去钉率的影响。该研究揭示了SU-8 / PZT微通道对去离子水具有部分疏水性，并且当使用甲苯作为液滴时完全润湿。甲苯的蒸发速率约为去离子水的蒸发速率的两倍。蒸发速率和去钉速率的比较表明，通道宽度对蒸发的影响大于通道深度。固定的薄膜和散装流体的等效接触角补偿了液滴的蒸发。还显示出表面粗糙度对矩形微通道中的固定膜有重大影响。

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  • 作者

    A. Odukoya; G.F. Naterer;

  • 作者单位

    Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON, Canada L1H 7K4;

    University of Ontario Institute of Technology, Oshawa, ON, Canada,Faculty of Engineering and Applied Science, Memorial University of Newfoundland, 240 Prince Phillip Drive, St. John's, NL, Canada A1B 3X5;

  • 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

    evaporation; depinning; microchannels; thermocapillary;

    机译：蒸发;固定微通道;热毛细管;

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