Wicking through a confined micropillar array |
| |
Authors: | Baptiste Darbois Texier Philippe Laurent Serguei Stoukatch Stéphane Dorbolo |
| |
Affiliation: | 1.Grasp, Physics Department,ULg,Liège,Belgium;2.Microsys, Montefiore Institute,ULg,Liège,Belgium |
| |
Abstract: | 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. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|