Dewetting transition of water on nanostructured and wettability patterned surfaces: A molecular dynamics study
Dewetting transition of water on nanostructured and wettability patterned surfaces: A molecular dynamics study
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DOI：
10.1016/j.molliq.2021.116869
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发表时间：
2021-07-29
影响因子：
6
通讯作者：
Wang, Xinyu
中科院分区：
文献类型：
--
作者：
Ding, Wenyang;Wang, Man;Wang, Xinyu
水在表面的滴状冷凝工程在发电、热管理、水收集和海水淡化等广泛应用中是至关重要的。通过分子动力学模拟，我们提出了一种延缓钉扎的有效途径，通过逐步调整体积分数、倾斜角和杂化润湿率来获得最佳组合。结果表明，体积分数越大，除湿转变能力越强，凝结性能越好。此外，纳米锥体表面的除湿过渡能力优于纳米柱表面，与其他倾角相比，10度倾角赋予表面最好的除湿过渡能力。此外，1/3的混合润湿性比能有效地悬浮液体，抵抗液体对表面质地的钉扎。最终得到了体积分数为1、倾角为10度、混合润湿率为1/3的最佳表面。(C)2021年爱思唯尔B.V.保留所有权利。
Engineering the dropwise condensation of water on surfaces is crucial in extensive applications including power generation, thermal management, water harvesting and desalination. Here we propose an efficacious avenue to retard pinning by molecular dynamics simulation, wherein the volume fraction, tilt angle and hybrid wettability ratio are adjusted in a progressive manner to obtain the optimal combination. The results demonstrate that a larger volume fraction leads to better dewetting transition ability and condensation performance. Additionally, the dewetting transition ability of nanocone surfaces is superior to that of nanopillar surfaces, and 10 degrees tilt angle endows surfaces with the best dewetting transition ability compared to other tilt angles. Moreover, 1/3 hybrid wettability ratio can effectively suspend the liquid and resist it from pinning to the texture of surfaces. Finally, an optimal surface characterized by fraction1 volume fraction, 10 degrees tilt angle and 1/3 hybrid wettability ratio is obtained. (C) 2021 Elsevier B.V. All rights reserved.