超声行波微流体驱动模型的耦合分析  

Coupled Analysis of Driving Model of Ultrasonic Travelling Wave Micro-Fluids

作　　者：张敬涛[1] 魏守水[1] 徐昊[1] 

机构地区：[1]山东大学生物医学工程研究所,济南250061

出　　处：《微纳电子技术》2010年第1期33-37,共5页Micronanoelectronic Technology

基　　金：国家自然科学基金项目(10572078);山东省自然科学基金(Y2007A16)

摘　　要：介绍了带有微沟道的超声行波微流体驱动的圆环模型。在对模型结构部分进行模态分析和瞬态动力学分析的基础上,基于有限元分析,针对耦合模型作声固耦合分析,分别得到与空气和水耦合时模型的固有频率;进行耦合场的流固耦合分析,采用瞬态动力学方法,得到沟道内流体在超声行波激励下的流场情况。比较不同时间子步时流体域和固体域的位移云图,得到流体随固体振动情况;分析不同时间子步时流体域的速度矢量图,得到流体在超声行波方向上的流动情况,验证了超声行波微流体驱动的可行性。The ring driving model of the ultrasonic travelling wave microfluid with microchannels was introduced. Based on the modal and transient dynamic analysis of the model structure and the acoustic-structure interaction analysis for the coupled model through the finite element method （FEM）, the natural frequency of the model coupled with the air and water was obtained respectively. By the fluid-structure interaction （FSI） analysis of the coupled field, the flow situation of the fluid in the microchannel powered by the ultrasonic wave was obtained by transient dynamic method. The vibration situation of the fluid with the structure was obtained by comparing the displacement contour of fluid and structure fields in different time substeps. The flow situation of the fluid along ultrasonic travelling wave was obtained by analyzing the velocity vector of the fluid field in different time substeps. The feasibility of the ultrasonic travelling wave microfluid driving is validated.

关 键 词：超声行波 有限元 微流体 声固耦合 流固耦合 瞬态动力学分析 

分 类 号：TM38[电气工程—电机]