化工进展2017，Vol.36Issue(z1)：43-50,8.DOI:10.16085/j.issn.1000-6613.2017-1568
十字型微通道中乳液流变行为的数值模拟
Numerical simulation of emulsion droplet formation in cross-j unction microfluidic channels
摘要
Abstract
Monodispersed emulsions are widely used in biomedical, chemistry and so on. Microfluidic devices with cross-j unction can produce monodispersed,homogeneous and spherical emulsions,which greatly simplifies the production process of emulsion and has important application value in the preparation of high quality emulsions.Numerical simulations of drop formation process in a cross-j unction system are performed based on VOF method and detailed hydrodynamic information involved is provided.There are four flow regimes between two immiscible fluids in the cross-j unction:squeezing, dripping, j etting and co-flowing.By analyzing the formation mechanism and evolution process,it is found that the interfacial tension and viscous force play a leading role in the droplet formation process.In addition,the influence of the cross-j unction angle on the size of the drops and the flow regimes is studied.The results show that the length of the drops is influenced by the angle significantly.However,the angel of the cross-j unction has little influence on the flow regime.关键词
微通道/乳液/可变频率振荡器/两相流Key words
microchannels/emulsions/VOF/two-phase flow分类
化学化工引用本文复制引用
丁奕文,刘向东,张程宾..十字型微通道中乳液流变行为的数值模拟[J].化工进展,2017,36(z1):43-50,8.基金项目
国家自然科学基金(51406175)及江苏省自然科学基金(BK20140488、BK20170082)项目. （51406175）
