摘要
要充分理解并利用微流体系统中流体的流动,需要对流体的动态特性有全面的了解。目前,流感与流阻的计算已经被大家熟知,可流容的计算仍是一个难点。本文设计了一个微流体流容器件,提出了测量微流体系统流容特性的方法。流容器件由圆形截面的一段玻璃管和一段弹性管组成。基于微流体等效电路理论我们对器件模型进行分析,仿真实验了系统在恒压和动态压强下不同的响应情况。利用恒压驱动的衰减振荡结果拟合出弹性流道的流容值,并与动态压强输入模型的共振响应结果进行了对比验证。结果证明,仿真结果与理论分析一致,拟合的流容值正确,提出的分析方法正确。整个模型的动态响应特性与电路中的带通滤波器类似。
The dynamic flow capacity of the capacitive microfluidic chip was empirically approximated,mathematically modeled,theoretically analyzed in Hagen-Poiseuillelawandmicrofluidic equivalent circuit theory,and numerically simulated with the a simple capacitive microfluidic chip,consisting of the circular glass tube connected with an elastic polydimethylsiloxane（ PDMS） tube. The impact of the realistic situation,including but not limited to the constant and alternating driving pressures,PDMS density and Young＇s modulus,and dynamic viscosity of water,on the flow capacity of PDMS tube was simulated and evaluated by data-fitting of the damped resonance response of the dynamic driver model. The fitted results show that the response characteristics of the dynamic model are basically analogous to those of a band-pass filter in an electronic circuit. The numerically simulated and theoretically analyzed results of the flow capacity were found to be in fairly good agreement.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2016年第3期362-366,共5页
Chinese Journal of Vacuum Science and Technology
基金
江苏省通信工程技术研究中心项目(ZSF0503)
江苏省普通高校研究生科研创新计划项目(CXZZ13_0465)
关键词
微流体
流容
等效电路理论
动态响应
带通滤波器
Microfluidics
Flow capacity
Equivalent circuit theory
Dynamic characteristic
Band-pass filter
