Objective In order to solve problem in accurately flow rate regulation and difficulty in precisely fluid-flow control, the analysis model is targeted at the valveless micropump with the purpose of studying a new structure. Methods The new structure was contained two linear elastic bars, which based on characteristics of bending deformation on linear elastic bars and the Navier-Stokes equation for theoretical model.The finite element model of the valveless micropump was built by using the finite element software,and the coupled-field simulation analysis was accomplished with the method of parametric sweep,the fluid flow rate in micropump and the net volume pumped are simulated and analyzed under different conditions which were the driving frequency and the driving amplitude. Results The net volume pumped rose up with the increase of the driving amplitude under the same condition of the driving frequency, and the output characteristics of the micropump tended to accomplish common performance. Conclusions It is an useful theoretical model and simulation for research as numerical reference of design and application, this research accumulate certain experience to design the valveless micropump.%目的 基于微泵流体速度调节不准确、难以实现流量精确控制等问题,以无阀微泵为研究目标,设计了一种新型内置线弹性棒的无阀微泵结构.方法 利用线弹性棒的弯曲变形特性及Navier-Stokes方程组,使用有限元方法建立新型无阀微泵的多物理场耦合数值模型,通过参数扫描计算分析了在不同驱动振幅和驱动频率下对无阀式微泵输出净流量的影响.结果 在驱动频率相同的条件下,微泵输出净流量随着驱动振幅的增加而增加;当保持驱动振幅不变时,提升驱动频率对微泵输出性能的影响较弱.结论 该研究的计算仿真分析为新型无阀式微泵的结构设计提供数值参考并积累一定的经验.
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