Evaporating drops on patterned surfaces: Transition from pinned to moving triple line
Evaporating drops on patterned surfaces: Transition from pinned to moving triple line
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DOI：
10.1016/j.jcis.2009.04.095
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发表时间：
2009-09-01
影响因子：
9.9
通讯作者：
Neti, Sudhakar
中科院分区：
文献类型：
--
作者：
Anantharaju, Neeharika;Panchagnula, Mahesh;Neti, Sudhakar
微图案化的表面上的固着液滴的蒸发的范围内的异质性的长度尺度和固体面积分数进行了研究。表面拓扑由均匀排列的方柱或方孔生成。使用高分辨率成像技术捕获蒸发过程，随后对接触角、接触圆直径和液滴体积等信息进行后处理。据观察，存在两个不同的蒸发阶段的所有基板特性：钉扎三线（TL）阶段和移动TL阶段。在这两个阶段中，该过程遵循表面积的线性减小。的无量纲蒸发速率常数被发现是较高的移动TL阶段相比，钉扎TL阶段。此外，发现三线拓扑结构对蒸发速率常数没有影响。(C)2009 Elsevier Inc. All rights reserved.
Evaporation of sessile drops on micro-patterned surfaces is investigated over a range of heterogeneity length scales and solid area fractions. The surface topology is generated by a uniform arrangement of square pillars or square holes. The evaporation process is captured using high resolution imaging techniques and later post-processed for such information as contact angle, contact circle diameter and drop volume. It is observed that two distinct phases of evaporation existed for all substrate characteristics: pinned triple line (TL) phase and moving TL phase. In both phases, the process follows a linear decrease of surface area. The dimensionless evaporation rate constant is found to be higher during the moving TL phase in comparison with the pinned TL phase. In addition, it is found that the triple line topology has no effect on the evaporation rate constant. (C) 2009 Elsevier Inc. All rights reserved.