Corners, cusps, and pearls in running drops
Corners, cusps, and pearls in running drops
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DOI：
10.1103/physrevlett.87.036102
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发表时间：
2001-07-16
影响因子：
8.6
通讯作者：
Limat, L
中科院分区：
文献类型：
--
作者：
Podgorski, T;Flesselles, JM;Limat, L
在部分湿润的衬底上滑下的小液滴根据它们的毛细数Ca分成不同的形状。在低Ca时，它们被一条圆滑的接触线所分隔。在中间值时，它们在后缘处形成一个角，其角度随着速度的增加而从平坦发展到60度。再往上看，它们的尾巴呈尖角状，发出更小的水滴（“珍珠”）。通过考虑沿接触线的动态接触角，可以定性和定量地恢复这些分岔。
Small drops sliding down a partially wetting substrate bifurcate between different shapes depending on their capillary number Ca. At low Ca, they are delimited by a rounded, smooth contact line. At intermediate values they develop a corner at the trailing edge, the angle of which evolves from flat to 60 degrees with increasing velocity. Further up, they exhibit a cusped tail that emits smaller drops ("pearls"). These bifurcations may be qualitatively and quantitatively recovered by considering the dynamic contact angle along the contact line.