James Franck Institute, Chicago, Illinois 60637, USA.
Phys Rev Lett. 2012 Aug 17;109(7):074301. doi: 10.1103/PhysRevLett.109.074301. Epub 2012 Aug 16.
In the Leidenfrost effect, liquid drops deposited on a hot surface levitate on a thin vapor cushion fed by evaporation of the liquid. This vapor layer forms a concave depression in the drop interface. Using laser-light interference coupled to high-speed imaging, we measured the radius, curvature, and height of the vapor pocket, as well as nonaxisymmetric fluctuations of the interface for water drops at different temperatures. The geometry of the vapor pocket depends primarily on the drop size and not on the substrate temperature.
在莱顿弗罗斯特效应中，液体滴落在热表面上会在由液体蒸发提供的薄蒸汽垫上悬浮。这个蒸汽层在液滴界面上形成一个凹形凹陷。我们使用激光光干涉耦合高速成像，测量了不同温度下水滴的蒸汽口袋的半径、曲率和高度，以及界面的非轴对称波动。蒸汽口袋的几何形状主要取决于液滴的大小，而与基底温度无关。
