摘要
从提高电磁式聚合物膜微流体动态混合器的混合性能出发,利用结构动力学理论对聚合物膜进行数值模拟,给出了其模态及谐响应分析结果;然后将其数值模拟结果耦合在流体动力学数值模型上,利用计算流体动力学理论对微腔内液体的流动特性进行了分析,得出低阶振动模式下的Re。对以数值模拟为依据制造的混合器进行了水与红墨水的混合试验。仿真与试验获得了相吻合的研究结果:二阶振动时Re 最大;当激振力振动频率在二阶自然频率附近时,混合液体振动最剧烈,混合最理想;振动剧烈程度是由振幅、频率共同决定的。
The dynamic analysis was applied to a microfluidic polymer membrane active mixer in order to optimize its design and improve its performance. The results of the modal and harmonic response analysis were given, which were coupled into the fluid field, giving the Rc of the first substep vibration and the maximum Re in the second substep. From mixing experiments, the best mixing took place also in the second substep. The results from simulation and experiments matched well, which proves that the simulation is feasible, and the degree of vibration depends on both amplitude and frequency.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2005年第2期127-134,共8页
Optics and Precision Engineering
基金
国家863MEMS重大专项(No.2003AA 3 A19)
(No.2004AA404250)
中国科学院二期创新"微型生化分析系统关键技术研究"资助项目
关键词
微流体动态混合器
数值模拟
模态
谐响应
计算流体动力学
Boundary conditions
Computer simulation
Electromagnetic fields
Fluid dynamics
Mathematical models
Polymeric membranes
Vibrations (mechanical)
