化工学报2016，Vol.67Issue(7)：2702-2708,7.DOI:10.11949/j.issn.0438-1157.20160263
Marangoni 对流的纹影实验分析
Solutal Marangoni convection by Schlieren method
摘要
Abstract
Marangoni convection in the physical desorption of carbon dioxide from ethanol solvent was studied experimentally. Evolution of the convective structures on the free surface of liquid layers was captured through Schlieren method. Especially, its initial form was captured under appropriate procedures. Each structure changed from approximately round to polygon because of space restriction. Mechanism of the Marangoni convection in mass transfer process was deduced from the luminance distribution of Schlieren images. The emergence, development and fission of a single structure were analyzed qualitatively. Interfacial turbulence caused by the non-uniform mass transfer process led to the deformation of free interface. Finally, the entire surface was filled with polygonal structures with its shape fixed. Fading color in the Schlieren images can reflect the decrease of turbulent intensity during the desorption process, which can be attributed to the change of mass transfer driving force.关键词
Marangoni 对流/纹影/解吸/界面/传质/对流结构Key words
Marangoni convection/Schlieren/desorption/interface/mass transfer/convection structure分类
化学化工引用本文复制引用
赵嵩,陈曼,曾爱武,金雾..Marangoni 对流的纹影实验分析[J].化工学报,2016,67(7):2702-2708,7.基金项目
国家科技支撑计划项目（2007BAB24B05）。@@@@supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (2007BAB24B05) （2007BAB24B05）
