鲁棒超疏水表面的拓扑优化
Topology optimization of robust superhydrophobic surfaces
摘要：
在本文中，我们首次将拓扑优化应用于微结构超疏水表面。实验观察到，悬浮在测微柱刷上的液滴显示出高的静态接触角和低的滚降角。为了防止流体穿透柱之间的空间，我们寻找最佳柱截面，当施加压差时，该最佳柱截面使液滴底部处的液体-空气界面的垂直位移最小化。拓扑优化在这个框架中证明是有效的，表明具有分支横截面的柱子是最佳的，这与实现超疏水性的几种生物策略一致。通过一种过滤技术，我们还可以控制优化设计的特征长度尺度，从而获得可行的几何形状
英文摘要：
In this paper we apply topology optimization to micro-structured superhydrophobic surfaces for the first time. It has been experimentally observed that a droplet suspended on a brush of micrometric posts shows a high static contact angle and low roll-off angle. To keep the fluid from penetrating the space between the posts, we search for an optimal post cross section, that minimizes the vertical displacement of the liquid-air interface at the base of the drop when a pressure difference is applied. Topology optimisation proves effective in this framework, showing that posts with a branching cross-section are optimal, which is consistent with several biologic strategies to achieve superhydrophobicity. Through a filtering technique, we can also control the characteristic length scale of the optimal design, thus obtaining feasible geometries
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