Molecular dynamics simulation on de-icing behavior of nanodroplets on amorphous SiO2

Wenqi Fan, Chen Li
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Abstract

The ice formation and detachment process of nanoscale water droplets on the amorphous SiO2 substrate, which is for simulating the glass of solar panels, is studied in this paper by molecular dynamics simulation methods, considering the effects of environmental temperature, onset of icing time, and parameters of the nanoarray on the ice formation morphology and ice adhesion strength. The results show that the ice adhesion strength is independent of the environmental temperature. The time of icing onset influences the recoil state of droplets, with a larger spreading area leading to higher adhesion strength. The increase in height and decrease in width of the nanocolumns of nanoarray structure leads to an increase in the contact angle of the droplet, causing a reduction in ice adhesion strength, albeit with a slight rise within a certain height range.
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非晶态二氧化硅上纳米液滴除冰行为的分子动力学模拟
本文采用分子动力学模拟方法,考虑了环境温度、结冰开始时间和纳米阵列参数对冰形成形态和冰附着强度的影响,研究了纳米级水滴在非晶态二氧化硅衬底(用于模拟太阳能电池板的玻璃)上的成冰和脱离过程。结果表明,冰粘附强度与环境温度无关。结冰开始的时间影响液滴的反冲状态,扩散面积越大,附着强度越高。纳米阵列结构的纳米柱高度增加、宽度减小会导致液滴接触角增大,从而降低冰附着强度,但在一定高度范围内会略有上升。
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