超疏水表面融霜液滴翻转与弹跳  

Defrosting Droplets Reversing and Self-jumping on Superhydrophobic Surface

作　　者：李帅[1] 李栋[1,2,3] 钱晨露 赵孝保 LI Shuai;LI Dong;QIAN Chen-Lu;ZHAO Xiao-Bao(School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 21004, China;Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, Nanjing 210042, China;School of Chemistry and Material Science, Nanjing Normal University, Nanjing 210042, China)

机构地区：[1]南京师范大学能源与机械工程学院,南京210042 [2]江苏省能源系统过程转化与减排技术工程实验室,南京210042 [3]南京师范大学化学与材料科学学院,南京210042

出　　处：《工程热物理学报》2019年第10期2383-2387,共5页Journal of Engineering Thermophysics

基　　金：江苏省自然科学基金青年项目(No.BK20150979);中国博士后基金61批面上项目(No.2017M611857)

摘　　要：试验观测超疏水表面融霜过程液滴动态行为,并对融霜过程液滴形成演化的物理机制进行了分析,推导了液滴自弹跳高度与液滴尺寸的关系,试验结果发现:超疏水表面融霜过程液滴存在翻转、旋转移动以及弹跳等动态行为,液膜收缩合并过程表面能的释放是驱动不同行为产生的主要原因。此外,融霜液滴弹跳高度取决于合并后液滴半径,随液滴尺寸的增加而降低。Dynamic behaviors of defrosting droplets on superhydrophobic surface were observed and the mechanism of droplet formation and evolution in defrosting process was analyzed.Beside,the relationship between defrosting droplets self-jumping height and droplet size was deduced.The experimental results showed that reversing,rotating and moving as well as self-jumping behaviors can be seen during defrosting droplets evolution process on superhydrophobic surface.The surface energy release during the liquid film shrinkage and coalescence can be considered as the main driving force for these dynamic behaviors.In addition,the self-jumping height of defrosting droplets depends on the radius of the coalesced droplets and can decrease with the increase of droplet size.

关 键 词：超疏水 融霜 自弹跳 动态行为 

分 类 号：TK121[动力工程及工程热物理—工程热物理]