文献类型：期刊文献

英文题名：NUMERICAL INVESTIGATION ON HYDRODYNAMICS OF VERTICALLY CONFINED FREE FILM

作者：Hu, Jianguang[1];Yang, Xiaogang[1,2];Yu, Jianguo[1];Dai, Gance[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Univ Nottingham Ningbo, Int Doctoral Innovat Ctr, Ningbo 315100, Zhejiang, Peoples R China

年份：2016

卷号：94

期号：2

起止页码：340

外文期刊名：CANADIAN JOURNAL OF CHEMICAL ENGINEERING

收录：;EI(收录号：20160201793821);WOS:【SCI-EXPANDED(收录号:WOS:000370195600017)】；

基金：Jianguang Hu acknowledges the support of the State Key Laboratory of Chemical Reactors, East China University of Science and Technology, for a Doctoral program scholarship to conduct the study. Xiaogang Yang especially thanks the University of Nottingham Ningbo and Ningbo Bureau of Science and Technology through a scientific and technology project (Grant No. 2012B10042) for supporting the joint research collaboration and the support of the 111 project of China.

语种：英文

外文关键词：confined free film; hydrodynamics; wall-bounded film; structured packing

摘要：For intensification of the film transfer process, flow behaviours of a novel type of liquid film, "confined free film" (a coexistence of both wall-bounded and unbounded films), on a vertically-aligned plate with an open window were investigated using the CFD modelling approach. It was found from the simulations that the liquid flow profiles of confined free film in the region of the open window vary with flow time. The average film thickness of the confined free film in the open window region is approximately 0.50 similar to 0.67 of that in the solid wall region, while the corresponding velocity is approximately 1.7 similar to 2.0 times faster. The falling film reaches its maximum thickness value and maximum velocity magnitude at the lower part of the open-window region in the current study. Simulation results also indicated that the region of the lower-wall plate promotes both varicose and sinuous wavy behaviour of the confined free film, while the open-window region assists in exciting film wave motion in the lower-wall region. Compared with vertically falling free film, the confined free film exhibits several distinctive features in its flow behaviour.