Simulation of the fluidic features for diffuser/nozzle involved in a PZT-based valveless micropump

作     者：HouWensheng Zheng Xiaolin Biswajit Das Jiang Yingtao Qian Shizhi Wu Xiaoying Zheng Zhigao 

作者机构：Department of Biomedical Engineering Chongqing University Chongqing 400044 China Nevada Nanotechnology Center University of Nevada Las Vegas NV 89154 USA Department of Electrical and Computer Engineering University of Nevada Las Vegas NV 89154 USA Department of Mechanical Engineering University of Nevada Las Vegas NV 89154 USA 

出 版 物：《仪器仪表学报》 (Chinese Journal of Scientific Instrument)

年 卷 期：2008年第29卷第1期

页      面：1-4页

核心收录：

学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 0804[工学-仪器科学与技术] 0703[理学-化学] 

基　　金：Supported by′111′Project and Chongqing Natural Science Foundation(2006BB2043 2006BB2142) 

主　　题：流体系统 模拟 无阀微型泵 散流器 喷嘴 

摘      要：PZT-based valveless micropump is a microactuator that can be used for controlling and delivering tiny amounts of fluids,and diffuser/nozzle plays an important role when this type of micropump drives the fluid flowing along a specific *** this paper,a numerical model of micropump has been proposed,and the fluidic properties of diffuser/nozzle have been simulated with *** the method of finite-element analysis,the increased pressure drop between inlet and outlet of diffuser/nozzle induces the increment of flow rate in both diffuser and nozzle simultaneously,but the increasing rate of diffuser is faster than that of *** L/R,ratio of L(length of cone pipe) and R(radius of minimal cross section of cone pipe) plays an important role in fluidic performance of diffuser and nozzle as well,and the mean flow rate will decrease with increment of L/*** mean flow rate reaches its peak value when L/R with the value of 10 regardless the divergence angle of diffuser or *** simulation results indicate that the fluidic properties of diffuser/nozzle can be defined by its geometric structure,and accordingly determine the efficiency of micropump.