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Meso-scale visual observation of frost formation on cold surfaces
Author(s): 
Pages: 1437-1440
Year: Issue:  10
Journal: JOURNAL OF TSINGHUA UNIVERSITY(SCIENCE AND TECHNOLOGY)

Keyword:  结霜过程疏水性表面凝露霜晶;
Abstract: 为研究冷表面上结霜的微细观过程以及表面湿润性对该过程的影响,对空气中水蒸气在铜裸面及疏水性涂层上的结霜过程进行了微细观可视化研究.实验中冷面温度为-10 ℃. 发现结霜过程并非单纯的凝华过程,而是经历了水珠生成、长大、冻结、初始霜晶生成以及霜晶成长(包括部分霜晶的倒伏)过程.与铜裸面相比,疏水面上水珠分布的较为稀疏,粒径较大,冻结较晚,初始霜晶较迟出现,霜晶高度较低.所有这些都说明疏水性表面可以延缓霜的形成及成长.
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