柱图案化微通道中的毛细管填充
Capillary filling in microchannels patterned by posts
摘要：
研究了具有方形截面柱状图案的三维微通道的毛细填充问题。我们表明，钉在柱子的边缘抑制，并可以停止，毛细血管填充。我们强调的重要性，通道壁在控制是否填充可以发生。特别是对于高于相邻柱之间的距离的通道，对于小于阈值角\sim 55 °的接触角发生填充，与通道的高度无关。
英文摘要：
We investigate the capillary filling of three dimensional micro-channels 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 \sim 55 deg., independent of the height of the channel.
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