Dynamics of Microscale Liquid Propagation in Micropillar Arrays

• DOI: 10.1021/acs.langmuir.7b01090
• Publication Date: 2017-05-31T14:28:07Z
• Authors: Mohamed H. Alhosani; TieJun Zhang
• Keywords: Microscale chemistry; Capillary pressure

Understanding the dynamics of microscale liquid propagation in micropillar arrays can lead to significant enhancement macroscopic modeling. Such a phenomenon is fairly complicated, and fundamental understanding lacking. The aim here estimate three main parameters propagation, capillary pressure, average height, contact angle on pillar side, through modeling experimental validation. We show that pressure not constant during evaluated using its maximum minimum values. height influences permeability such structure, which challenging determine as result complicated three-dimensional (3D) meniscus shape. A simple physical model provided this paper predict with less than 7% error. has considerable impact been debated for long time. propose validate it against values literature. Our findings also indicate microscopic motion front significantly affected by ratio edge-to-edge spacing, correlation quantification. proposed models are able droplet spreading distance time reasonably.