Trapping Leidenfrost Drops with Crenelations
Trapping Leidenfrost Drops with Crenelations
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DOI：
10.1103/physrevlett.107.114503
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发表时间：
2011-09-08
影响因子：
8.6
通讯作者：
Quere, David
中科院分区：
文献类型：
--
作者：
Dupeux, Guillaume;Le Merrer, Marie;Quere, David
正如莱登弗罗斯特发现的那样，放置在非常热的固体上的水滴漂浮在它们自己的蒸汽垫上。这赋予了这些水滴非凡的机动性，这使得它们的控制和操纵变得有问题。在这里，我们展示了如何利用凹陷的表面将莱登弗罗斯特液滴的摩擦力增加约100倍，使它们减速并被困在厘米距离上，而不是通常的公制距离。我们测量并表征了摩擦力作为波纹设计的函数。
Drops placed on very hot solids levitate on a cushion of their own vapor, as discovered by Leidenfrost. This confers to these drops a remarkable mobility, which makes problematic their control and manipulation. Here we show how crenelated surfaces can be used to increase the friction of Leidenfrost drops by a factor on the order of 100, making them decelerate and be trapped on centimetric distances instead of the usual metric ones. We measure and characterize the friction force as a function of the design of the crenelations.