Modelling of microfluidics network using electric circuits

N. Zaidon, A. Nordin, A. Ismail
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引用次数: 3

Abstract

This paper presents microfluidic network analysis using electric circuit methods by modifying the length of the channel segments that represent hydraulic resistance. It is crucial to precisely predicts flow and pressure in the channel by an accurate estimation of the hydraulic resistance of each segment, as microfluidics network become more complex and challenging. Furthermore, manipulation of channel length and size can be applied to design concentration gradient that based on repeated splitting, mixing and recombination fluid flow process, thereby producing a desired concentration profile. By using Hagen-Poiseuille's law-Ohm's law analogy, a batch of simulation 3D-microfluidic geometries was done using FLUENT while PSpice was used to validate the correlations of flow rate to current and hydraulic resistance to electrical resistance. This is done by characterizing hydraulic resistance of microchannels with different length to make-controlled volumetric mixing ratios at each branch. Different velocity magnitude contours and pressure profiles obtained from the channel length combinations agree well this analogy.
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基于电路的微流体网络建模
本文提出了微流控网络分析使用电路的方法,通过修改长度的通道段,表示液压阻力。随着微流控网络的日益复杂和具有挑战性,通过准确估计各段的水力阻力来准确预测通道内的流量和压力至关重要。此外,可以通过控制通道长度和大小来设计基于反复分裂、混合和重组流体流动过程的浓度梯度,从而产生所需的浓度分布。采用Hagen-Poiseuille’s law- ohm’s law类比,利用FLUENT进行了一批三维微流控几何仿真,并利用PSpice验证了流量与电流、水力阻力与电阻的相关性。这是通过表征不同长度微通道的水力阻力来实现的,以控制每个分支的体积混合比。从通道长度组合中得到的不同速度大小等值线和压力分布都很好地符合这一类比。
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