化工学报2013，Vol.64Issue(8)：2846-2852,7.DOI:10.3969/j.issn.0438-1157.2013.08.021
气液传质液滴界面的Marangoni对流
Marangoni convection at droplet interface during gas-liquid mass transfer
摘要
Abstract
By sweeping binary droplets with N2 gas,the Marangoni convection driven by desorption of light component into gas phase is observed with the help of laser shadowgraph optical method.The results show that Marangoni convection arises as small-scale vortex and large-scale symmetrical circular flow.The small-scale vortex structure appears in the ethanol-water droplet at the very beginning,and then vortex structure develops and merges to form larger vortex flow.At the interface of acetone-water binary droplet,symmetrical circular flow appears at first,and then vortex flow arises in the circular flow.For the quiescent single binary droplet composed of ethanol-water and acetone water separately,the mass transfer coefficient is measured to compare with theoretical prediction while N2 gas purges the gas-liquid interface.Experimental results show that the large-scale symmetrical circular inside the droplet can promote mass transfer process much better than the small-scale vortex near the interface of droplet.关键词
单液滴/传质/Marangoni对流/界面湍动Key words
single droplet/ mass transfer/ Marangoni convection/ interface turbulence分类
化学化工引用本文复制引用
林晗丹,焦放健,余光雄,颜俊,沙勇..气液传质液滴界面的Marangoni对流[J].化工学报,2013,64(8):2846-2852,7.基金项目
国家自然科学基金项目(20606027).supported by the National Natural Science Foundation of China (20606027). （20606027）
