期刊
MICROFLUIDICS AND NANOFLUIDICS
卷 20, 期 4, 页码 -出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10404-016-1724-3
关键词
Microchannel wicking; Micropillar array; Liquid impregnation
资金
- Interuniversity Attraction Poles Programme (IAP) [7/38]
- FNRS
This study considers the spreading of a Newtonian and perfectly wetting liquid in a square array of cylindric micropillars confined between two plates. We show experimentally that the dynamics of the contact line follows a Washburn-like law which depends on the characteristics of the micropillar array (height, diameter and pitch). The presence of pillars can either enhance or slow down the motion of the contact line. A theoretical model based on capillary and viscous forces has been developed in order to rationalize our observations. Finally, the impact of pillars on the volumic flow rate of liquid which is pumped in the microchannel is inspected.
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