拉普拉斯压力
毛细管作用
润湿
半径
下降(电信)
机械
毛细管数
材料科学
分叉
窄间隙
变形(气象学)
毛细管长度
表面张力
物理
复合材料
热力学
非线性系统
电信
量子力学
计算机科学
计算机安全
作者
Jason Wexler,Tiara M. Heard,Howard A. Stone
标识
DOI:10.1103/physrevlett.112.066102
摘要
A wetting droplet trapped in the thin gap between two elastic bodies will deflect the bodies towards one another. The deformation increases the total capillary adhesion force by increasing the contact radius and narrowing the gap height. For flat droplets, with a large ratio of radius to gap height, the Laplace pressure causes surface deformations that are orders of magnitude larger than those induced by a sessile droplet of the same radius. We present experiments, scalings, and closed-form solutions that describe the deformation. Using variational techniques, we also show that the problem exhibits a bifurcation, where the gap spontaneously closes due to an incremental increase in drop volume.
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