Droplet Evaporation on a Hydrophilic Mesh Considering Their Sunken Shapes in Holes

被引：5

作者：

Yang, Qiang ^{[1
]}

Ding, Yanliang ^{[1
]}

Xu, Xiao ^{[1
]}

Lu, Hao ^{[1
]}

Wang, Hualin ^{[2
,3
]}

Liu, Honglai ^{[2
]}

机构：

[1] East China Univ Sci & Technol, Sch Mech & Power Engn, Meilong Rd, Shanghai 200237, Peoples R China

[2] East China Univ Sci & Technol, State Key Lab Chem Engn, Meilong Rd, Shanghai 200237, Peoples R China

[3] East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Meilong Rd, Shanghai 200237, Peoples R China

来源：

CHEMICAL ENGINEERING & TECHNOLOGY | 2020年 / 43卷 / 01期

基金：

国家重点研发计划; 中国博士后科学基金; 中国国家自然科学基金;

关键词：

Droplet evaporation; Droplet shape; Hydrophilic mesh; Mass transfer; CAPTIVE BUBBLE METHOD; WATER DROPLET; ANGLE; MEMBRANES; DYNAMICS; SURFACE;

D O I：

10.1002/ceat.201900237

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The evolution of droplet shapes on a hydrophilic copper mesh was studied by using high-speed microscopic imaging technology. When a water droplet wets a hydrophilic mesh, the liquid-vapor interface initially adopts a convex shape, named as the "first darkness". Then, as the water evaporates, the liquid-vapor interface flattens, and then it gradually adopts a concave shape; meanwhile, a "second darkness" forms. Taking the shapes of droplets sunken in holes into consideration, the quantitative liquid-vapor interface area was acquired. The evaporation coefficient becomes lower and more reasonable when considering the area increase due to the pentahedron sunken liquid in the holes. A speculation was employed to understand the observed evaporation behavior and the overprediction of the evaporation coefficient.

引用

页码：143 / 149

页数：7

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