论文标题
通过仿生来优化雾气收获
Optimizing fog harvesting by biomimicry
论文作者
论文摘要
受stenocara甲虫的启发，我们研究了一个理想的平坦表面，该表面是由疏水基质中的常规亲水圆形斑块组成的，相对于水平倾斜$α$。基于粘结号的一阶拉普拉斯 - 杨方程的精确溶液，对于贴合的倾向和疏水性接触角，表面的液体存储容量被最大化为斑块半径的函数，例如$ 45^{\ circ} $或$ 90^\ circ $。发现最佳半径平均防止从斑块的顶部脱水，并在底部溢出。这些理论上的考虑通过几个实验涉及不同斑块大小和不同倾斜度的玻璃/八甲基三氯烷（OTS）系统的实验来验证。在一个简单的动力学模型中，考虑到雾的通量在表面上或在适当冷却的表面上凝结，我们发现最大收获的条件与最大静态存储的条件一致。该方法可以开发用于掉落和放置运输应用，例如水收获系统。
Inspired by the stenocara beetle, we study an ideal flat surface composed of a regular array of hydrophilic circular patches in a hydrophobic matrix on an incline of tilt $α$ with respect to the horizontal. Based on an exact solution of the Laplace-Young equation at first order in the Bond number, the liquid storage capacity of the surface is maximized as function of the patch radius, for suitable ranges of hydrophilic and hydrophobic contact angles, for tilt angles such as $45^{\circ}$ or $90^\circ$. It is found that the optimal radius equally prevents dewetting from the top of the patches and overflow at the bottom. These theoretical considerations are validated by several experiments for the glass/octadecyltrichlorosilane (OTS) system involving different patch sizes and different inclinations. In a simple dynamical model, taking into account the flux of fog onto the surface or condensation on a suitably cooled surface, we find that the conditions for maximum harvest agree with the ones of maximum static storage. The method could be developed for drop storage and drop transport applications such as water-harvesting systems.
