期刊
PHYSICAL REVIEW E
卷 80, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.80.056309
关键词
capillarity; contact angle; microchannel flow
资金
- EU
We investigate the capillary filling of three-dimensional microchannels with surfaces patterned by posts of square cross section. We show that pinning on the edges of the posts suppresses and can halt capillary filling. We stress the importance of the channel walls in controlling whether filling can occur. In particular for channels higher than the distance between adjacent posts, filling occurs for contact angles less than a threshold angle of similar to 55 degrees, independent of the height of the channel.
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