摘要
采用有限元仿真软件ANSYS/FLOTRAN对收缩/扩张型无阀微泵泵腔中流体流动的全过程进行了数值模拟和仿真分析,得到了流体在整个泵腔中的流场构形和流动特性。结果表明,泵腔结构单元的弯道效应与出/入口处流体速度分布的非线性混合将导致腔中的局域涡流现象。通过对3个简单模型的模拟计算,证明了缓冲腔的不同结构对无阀微泵的整流效率有较大影响,是泵腔结构参数优化设计不可忽视的重要环节。
The flow in a diffuser/nozzle valveless micropump chamber is studied by using ANSYS/FLOTRAN code, and the structure of fluid-field and characteristics of microflow in the pump chamber are obtained numerically. It shows that the nonlinear coupling between the roundturning effect and the distribution of flowing velocity at the exit/entrance can result in the generation of local vortex. Three simple models of chambers are applied to demonstrate the dependence of the flow-directing efficiency on the buffer structure and parameters, which is significant for the design of optimized micropump chambers.
出处
《微纳电子技术》
CAS
2005年第9期415-419,共5页
Micronanoelectronic Technology
基金
国家863项目(2004AA404260)北京市自然基金重点项目(3031001)
