Texturing a flat superhydrophobic substrate with point-like superhydrophobic macrotextures of the same repellency makes impacting water droplets take off as rings, which leads to shorter bouncing times than on a flat substrate. We investigate the contact time reduction on such elementary macrotextures through experiment and simulations. We understand the observations by decomposing the impacting drop reshaped by the defect into sub-units (or blobs) whose size is fixed by the liquid ring width. We test the blob picture by looking at the reduction of contact time for off-centered impacts and for impacts in grooves that produce liquid ribbons where the blob size is fixed by the width of the channel.

中文翻译：

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驱蚊剂奇异之处使水弹跳†

使用具有相同排斥性的点状超疏水宏观纹理对平坦的超疏水基材进行纹理处理，会使撞击的水滴以环的形式排出，从而导致反弹时间比在平坦的基材上短。我们通过实验和模拟研究了此类基本宏观纹理接触时间的减少。通过将由缺陷重塑的冲击液滴分解为大小由液环宽度固定的子单元（或斑点），我们了解了这些观察结果。我们通过观察偏心冲击的接触时间的减少以及产生液体色带的凹槽中的冲击的接触时间的减少来测试斑点的图片，其中斑点的大小由通道的宽度固定。