THEORETICAL AND EXPERIMENTAL AANALYSIS OF CHAOTIC MIXING EFFICIENCY OF PLUG FLOW IN DIFFERENT GEOMETRY
Improved mixing is particularly important at high Peclet numbers, that is, when advection dominates over diffusion. Mixing multiple fluids based on plugs flow is a better approach in such case. In order to understand the mixing mechanism based on plug flow, theoretical analysis based on chaotic concept were carried out. It is proved that there is linked twist map (LTM) possessing the Bernoulli property and consequential chaos in the plug. In addition, a micro-resolution particle image velocimetry (Micro-PIV) is used to measure the flow field in liquid plug involving liquid species to be mixed Two recirculating flows forming in plugs can enhance the mixing efficiency because folding and stretching of the liquids occured deterministically in plugs. The mixing efficiency in winding microchannel with plugs is proved to be much higher than that of other micromixer when the initial species distribution being in layer along stream. These results are helpful to optimize the structure of micromixer and to develop droplet based microfluidic system.
Chaos mixing efficiency plug flow theoretical and experimental analysis
Ruijin Wang Jianzhong Lin
School of Mechanical Engineering, Zhejiang University of Science and Technology,Hangzhou 310012, Chi China Jiliang University, Hangzhou 310028, China
国际会议
The 4th International Forum on Post-genome Technologies(4IFPT)(第四届国际后基因组生命科学技术学术论坛)
杭州
英文
404-407
2006-09-25（万方平台首次上网日期，不代表论文的发表时间）