Multi-Physics Coupling Analysis and Experiments on Piezoelectric Micro-Jet of Auxiliary Droplets

doi:10.7652/xjtuxb201611009

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Multi-Physics Coupling Analysis and Experiments on Piezoelectric Micro-Jet of Auxiliary Droplets

更新时间：2025-07-09

- Multi-Physics Coupling Analysis and Experiments on Piezoelectric Micro-Jet of Auxiliary Droplets
- Vol. 50, Issue 11, Pages: 56-61(2016)
- 作者机构：
  
  1. 山东理工大学机械工程学院,山东,淄博,255049
  2. 哈尔滨工业大学机器人技术与系统国家重点实验室,哈尔滨,150080
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201611009
  CLC： TP24
- Online First：10 November 2016，
  
  Published：2016
- 稿件说明：
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Multi-Physics Coupling Analysis and Experiments on Piezoelectric Micro-Jet of Auxiliary Droplets[J]. 2016, 50(11): 56-61.
DOI：

Multi-Physics Coupling Analysis and Experiments on Piezoelectric Micro-Jet of Auxiliary Droplets[J]. 2016, 50(11): 56-61. DOI： 10.7652/xjtuxb201611009.

摘要

针对微对象辅助释放的操作液滴需求

基于压电驱动的方法进行辅助液滴的分配控制

设计了压电微喷分配器

利用单脉冲压电激励实现非接触式分配

分析了单液滴的形成条件。基于多物理场法

建立压电微喷液滴的多物理场耦合模型

包括压电设备、流固耦合、层流和两相流模型

以此模拟液滴的形成进程

并分析影响液滴形成能力的因素。在构建的微操作系统平台上进行实验分析

结果表明

分配液滴的体积随着驱动电压的幅值和脉冲宽度的增大而增大

较大的参数值利于单液滴形成

与仿真结果分析一致。通过对控制参数的复合调节

所设计的分配器可分配3.5 nL的最小液滴

满足微对象辅助释放的操作液滴要求。直径为200 μm的锡球和聚苯乙烯微球的辅助释放任务的实施

验证了所提出的方法和研制工具的有效性。

Abstract

To satisfy the manipulation requirement of auxiliary droplets release aiming at micro-objects

a droplet dispensing method based on piezoelectric drive is presented. The dispenser of piezoelectric micro-jet

which employs piezoelectric actuator to achieve non-contact dispensing

is designed. Accordingly

the formation condition of single droplet is analyzed. Subsequently

a multi-physics coupled model of piezoelectric micro-jet

including piezoelectric device model

fluid-solid interaction model

laminar flow model

and two-phase flow model

is established to simulate the process of droplets formation and analyze the factors affecting the droplet formation capacity. Experimental tests were conducted on a customized micromanipulation platform to verify the performance of the micro-dispenser. Experimental results indicate that the droplet volume increases with the driving voltage and pulse width. Meanwhile

the single droplet forms more easily with higher driving voltage and larger pulse width

and the results are consistent with simulation. Through the comprehensive adjustment of control parameters

the minimum drop volume of 3.5 nL

which is sufficient for micro-object auxiliary release

can be obtained using the designed micro-dispenser. The feasibility of the proposed method and the fabricated micro-dispenser were verified by the manipulation of tin and polystyrene microspheres with a diameter of 200 μm.

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Keywords

references

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