期刊
PHYSICAL REVIEW LETTERS
卷 107, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.124501
关键词
-
资金
- Chateaubriand fellowship
- Direction des Relations Exterieures of Ecole Polytechnique
A small hole etched in the top of a wide microchannel creates a well of surface energy for a confined drop. This produces an attractive force F-gamma equal to the energy gradient, which is estimated from geometric arguments. We use the drag F-d from an outer flow to probe the trapping mechanism. When F-d < F-gamma, the drop deforms but remains anchored to the hole. Its shape provides information about the pressure field. At higher flow velocities, the drop detaches, defining a critical capillary number for which F-d = F gamma. The measured anchoring force agrees with the geometric model.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据