文献类型：期刊文献

英文题名：Droplet Evaporation on a Hydrophilic Mesh Considering Their Sunken Shapes in Holes

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

年份：2020

卷号：43

期号：1

起止页码：143

外文期刊名：CHEMICAL ENGINEERING & TECHNOLOGY

收录：;EI(收录号：20194407601037);WOS:【SCI-EXPANDED(收录号:WOS:000490796300001)】；

基金：The authors wish to express their sincere gratitude to the National Natural Science Foundation of China (51678238, 51722806, 51608325), the National Key R&D Program of China (2018YFC1802704, 2018YFC1801904), the China Postdoctoral Science Foundation (funded project 2018M641942), and the Shanghai Sailing Program (19YF1411800) for financial support.

语种：英文

外文关键词：Droplet evaporation; Droplet shape; Hydrophilic mesh; Mass transfer

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.