文献类型：期刊文献

英文题名：Numerical simulation on flow behavior of twin-liquid films over a vertical plate with an open window

作者：Xie, Hanguang[1];Hu, Jianguang[1];Dai, Gance[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2018

卷号：64

期号：4

起止页码：1458

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20174804454732);WOS:【SCI-EXPANDED(收录号:WOS:000426489500026)】；

语种：英文

外文关键词：twin-liquid films; confined free films; window; CFD

摘要：A novel element for gas-liquid contact, a plate with rectangular windows was designed to enhance absorption process. Coexistence and interaction of wall-bounded films and confined free films named as twin-liquid films were observed on the plate. Volume of fluid (VOF) method was used to simulate its flow behavior. Flow phenomena such as flow around a step-in, jet impingement, varicose waves, and sinuous waves were observed. Different from thin films flow on an unperforated plate, larger mean velocity, thinner film thickness, more intensive capillary waves, and stronger vorticity on the free surfaces were detected inside the window, and the disturbances could propagate over the whole plate. Three-dimensional simulation results generally agreed with our experimental observations and further demonstrated complex wavy structures both inside and outside the window. The results would broaden traditional knowledge of liquid films flow and clarify the mechanism of mass transfer intensification for the plate with windows. (c) 2017 American Institute of Chemical Engineers AIChE J, 64: 1458-1468, 2018