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Droplet fluid infusion into a dust layer in relation to self-cleaning

机译：液滴流体输注到与自清洁有关的灰尘层

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摘要

Wettability of a droplet liquid on a dusty hydrophobic plate is considered and the fluid infusion into the dust layer is studied pertinent to dust removal from the hydrophobic surfacesviarolling/sliding droplets. Influence of droplet hydrostatic pressure on the fluid infusion into dust layer is also investigated towards exploring the dust removal mechanisms. Environmental dust characteristics are evaluated and their interface with the droplet fluid is assessed. Sets of experiments are carried out to examine: (i) droplet fluid infusion into the dust layer, (ii) droplet fluid cloaking of dust, and (iii) evaluate the weight gain of the dust particles during cloaking. The findings reveal that droplet fluid (water) spreads onto the dusty surface and infuses on the dust particles. Cloaking velocity decays sharply with time and the weight gain of the dust particles is about 17% of the original dust weight after cloaking. The dust particles have a large area of nano-size open-pores-sites on the surface; however, capillary diffusion through these sites is limited with shallow depths and the weight gain of a dust particleviacapillary diffusion is about 1% of the particle weight. The maximum infusion depth of the droplet fluid in the dust layer is about 74 mu m, which is slightly less than the dust layer thickness on the surface. The rolling droplet picks up all the dust from the 150 mu m thick dust layer on the surface.
机译：考虑液体疏水板上的液滴液体的润湿性，并研究了从疏水性表面过度/滑动液滴中的除尘物中的流体输注到粉尘层中。还研究了探索除尘机构的液滴静水压力对流体输注到粉尘层的影响。评估环境粉尘特性，并评估其与液滴流体的界面。进行一组实验以检查：（i）液滴流体输注进入灰尘层，（ii）粉尘的液滴流体粘附，（iii）在粘附过程中评价粉尘颗粒的重量增益。结果表明，液滴流体（水）将散热在尘土飞扬的表面上并注入粉尘颗粒上。随着时间的推移急剧衰减，粉尘颗粒的重量增益约为原始防尘后的重量增益约为原始粉尘的17％。粉尘颗粒在表面上具有大面积的纳米型开孔部位;然而，通过这些位点的毛细管扩散受到浅深度的限制，粉尘粒状扩散的重量增益约为颗粒重量的1％。灰尘层中的液滴流体的最大输注深度为约74μm，略小于表面上的灰尘层厚度。滚动液滴从表面上的150μm厚的灰尘层拾取所有灰尘。

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  • 来源
    《RSC Advances》 |2020年第53期|共9页
  • 作者

    Hassan Ghassan; Yilbas Bekir Sami; Al-Qahtani Hussain;

  • 作者单位

    King Fahd Univ Petr &

    Minerals Mech Engn Dept Dhahran Saudi Arabia;

    King Fahd Univ Petr &

    Minerals Mech Engn Dept Dhahran Saudi Arabia;

    King Fahd Univ Petr &

    Minerals Mech Engn Dept Dhahran Saudi Arabia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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