Gravity is commonly considered negligible when the surface tension is dominant; i.e., the Bond number is less than 1. In this paper, however, the authors present a technique in which drops slide over surfaces with zero effective gravity. Our study compared the sliding motion of water drops on hydrophilic and hydrophobic surfaces in scenarios: one in which effective gravity = 1 (1 g) and one in which it = 0 (0 g). The authors found that the lateral retention force was greater under 1 g than it was under 0 g. Also, the results showed that retention forces calculated by Furmidge equation are higher than the measured forces.

中文翻译：

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水滴在固体表面上的横向滞留而无重力作用

当表面张力占主导地位时，重力通常被忽略不计。即，键数小于1。但是，在本文中，作者提出了一种技术，其中液滴在有效重力为零的情况下在表面上滑动。我们的研究在以下情况下比较了水滴在亲水性和疏水性表面上的滑动运动：一种有效重力= 1（1 g），另一种有效重力= 0（0 g）。作者发现，1 g以下的侧向保持力大于0 g以下的侧向保持力。而且，结果表明，通过Furmidge方程计算的固位力高于实测力。