Water Droplet Spreading and Wicking on Nanostructured Surfaces
Water Droplet Spreading and Wicking on Nanostructured Surfaces
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DOI：
10.1021/acs.langmuir.7b01223
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发表时间：
2017-07-11
期刊：
影响因子：
3.9
通讯作者：
Jiang, Peixue
中科院分区：
文献类型：
--
作者：
Chen, Xue;Chen, Jiannan;Jiang, Peixue
纳米结构表面具有良好的上级润湿性，是一种高效的高热通量器件冷却方法。液滴扩散和芯吸效应则主导传热。因此，本研究探讨液滴接触后的纳米结构表面上的ZnO纳米线表面上的三种不同的纳米线尺寸和两种阵列类型（规则和不规则）的流动行为。相对于时间测量铺展直径和芯吸直径。结果表明，在规则纳米结构表面上的平均铺展速度和毛细作用速度均小于在不规则纳米结构表面上的平均铺展速度和毛细作用速度，纳米线的尺寸影响液体的铺展和毛细作用。
Phase-change heat transfer on nanostructured surfaces is an efficient cooling method for high heat flux devices due to its superior wettability. Liquid droplet spreading and wicking effect then dominate the heat transfer. Therefore, this study investigates the flow behavior after a droplet touches a nanostructured surface focusing on the ZnO nanowire surface with three different nanowire sizes and two array types (regular and irregular). The spreading diameter and the wicking diameter are measured against time. The results show that the average spreading and wicking velocities on a regular nanostructured surface are both smaller than those on an irregular nanostructured surface and that the nanowire size affects the liquid spreading and capillary wicking.