At the scale of drops, water either sticks to inclined solids or moves, yet slowly—without the mobility we expect of a liquid of low viscosity. We first recall that the contact line that bounds a drop is responsible for these special adhesion and enhanced friction properties. Then, we discuss how inducing nonwetting states (pearls and marbles) minimizes the role of this line, restores mobility, and even boosts the liquid when it is viscous.

中文翻译：

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水滴、珍珠和弹珠的流动性

在水滴的尺度上，水要么粘在倾斜的固体上，要么移动，但速度很慢——没有我们期望的低粘度液体的移动性。我们首先回顾一下，限制液滴的接触线负责这些特殊的粘附力和增强的摩擦特性。然后，我们讨论如何引入非润湿状态（珍珠和大理石）最大限度地减少这条线的作用，恢复流动性，甚至在液体粘稠时增强液体。