摘要
针对微流体器件中几种典型微管道进行了理论与试验研究,采用CFD流场仿真技术对压力驱动方式下90°折管、突然扩散管、弯管三种流道的流态进行数值模拟,重点介绍了电渗驱动的流场仿真技术,并以十字交叉微管道为对象进行电渗流场仿真;同时采用玻璃微加工工艺制造了上述四种微流道模型,并通过Micro-PIV技术对其相应条件下的流场进行试验测试,并定量对比与分析了仿真与试验结果,结论显示Micro-PIV是适合于微米级流场检测的最有效试验手段之一,同时通过试验也验证了N-S方程在微米级流场数值计算中是依然适用的。
Both the theoretical and experimental analyses on several typical micro channels of the micro fluidic systems are presented. The flow patterns of the rigging angle bend channel, the sudden expansive channel and the elbow channel on the pressure driven mode are numerically analyzed by using CFD simulation technology. The simulation method for the electro-osmosis is described and the electroosmosis flow inside the cross channel is simulated. Four kinds of micro channel models are micromachined with glass material and experimentally detected by using Micro-PIV technology. A good agreement is obtained by comparing the simulation results with the experimental results. From the results, The Micro-PIV technology is indicated to be the most efficient experimental method for micro flow detection. Furthermore, N-S equation is experimentally proved to be correct in the micron flow numerical simulation.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2006年第5期32-38,共7页
Journal of Mechanical Engineering
基金
国家自然科学基金(50335010)
高等学校博士学科点专项科研基金(20030335026)资助项目。
