摘要
微流控系统由于微通道尺寸变得越来越小,所以原先传统的外力驱动方式遇到了很大的困难。而表面张力驱动微流体不需要任何外部能量源,对于设备小型化和集成化非常有优势。课题组通过对微混合通道内设置挡板,改变挡板的结构参数,通过数值模拟来研究表面张力驱动下挡板结构参数对混合效果的影响。研究结果表明:设置了挡板后微通道的混合效果显著提高;同时随着挡板结构参数的改变,微通道的混合效果也随之呈现出一定的变化规律。挡板的设置扰乱了微流体的流动,使得流体间的界面接触变多,混合效果得到提高。
As the size of microchannels of the microfluidic system becomes smaller and smaller,the traditional external force driving method has encountered great difficulties.The surface-tension-driven microfluid does not require any external power source,which is very advantageous for miniaturization and integration of microfluidic devices.By setting the baffle in the micro-mixing channel and changing the structural parameters of the baffle,the influence of the structural parameters of the baffle driven by the surface tension on the mixing effect was studied by numerical simulation.The results show that the mixing effect of the microchannels with baffle is significantly improved.At the same time,with the change of the baffle structure parameters,the mixing effect of microchannel also presents a certain variation law.The setting of baffle disturbs the flow of the microfluids,making the interface contact of the fluids more and improving the mixing performance.
作者
唐钧屹
陈晔
TANG Junyi;CHEN Ye(School of Mechanical and Power Engineering,Nanjing Technology University,Nanjing 211816,China)
出处
《轻工机械》
CAS
2020年第2期18-23,共6页
Light Industry Machinery
关键词
微混合器
表面张力驱动
挡板
混合效果
数值模拟
micro-mixer
surface-tension-driven
baffle
mixing performance
numerical simulation
