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Numerical analysis of anisotropic wetting of chemically striped surfaces

机译：化学条纹表面各向异性润湿的数值分析

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摘要

In this paper, the measurement process of advancing and receding contact angles (CA) in experiments is simulated using Surface Evolver (SE). The normalized energy of the droplet is calculated by fixing the three-phase contact line that lies at the boundary between stripes and by changing the droplet volume. The most stable wetting state is determined for each stripe configuration. The slip-jump behavior of the three-phase contact line is observed. Furthermore, a small wet stripe width and large dry stripe width is found to be favorable for achieving large stable equilibrium CA. Moreover, the minimum advancing CA and maximum receding CA can be obtained by assigning a value of zero to the normalized energy barrier. The variation of minimum advancing CA and maximum receding CA with wet and dry stripe widths follows the same trend as the stable equilibrium CA. Combined with the existing model in the literature, the approach introduced in this paper can be used to narrow down the predicted range of dynamic CAs and also to provide guidance for designing anisotropic surfaces.
机译：在本文中，使用表面Evolver（SE）模拟实验中推进和取出接触角（CA）的测量过程。通过固定在条纹之间的边界处的三相接触线和通过改变液滴体积来计算液滴的归一化能量。针对每个条纹配置确定最稳定的润湿状态。观察到三相接触线的防滑行为。此外，发现小湿条纹宽度和大的干条宽度是有利于实现大型稳定平衡的CA.此外，通过将零的值分配给归一化的能量屏障，可以获得最小前进的CA和最大后退CA。具有潮湿和干条宽度的最小前进的CA和最大后退Ca的变化遵循与稳定平衡CA相同的趋势。结合了文献中的现有模型，本文介绍的方法可用于缩小动态CAS的预测范围，并为设计各向异性表面提供指导。

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  • 来源
    《RSC Advances》 |2018年第55期|共10页
  • 作者

    He Liang; Sui Xin; Liang Wenyan; Wang Zhenqing; Akbarzadeh Abdolhamid;

  • 作者单位

    Harbin Engn Univ Coll Aerosp &

    Civil Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Coll Aerosp &

    Civil Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Coll Aerosp &

    Civil Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Coll Aerosp &

    Civil Engn Harbin 150001 Heilongjiang Peoples R China;

    McGill Univ Dept Biaresaurce Engn Island Of Montreal PQ H9X 3V9 Canada;

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  • 正文语种 eng
  • 中图分类 化学;
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