微流体流量分配网络的两种数值设计方法

Two Numerical Methods for Designing the Microfluidic Networks with Specified Outlet Flowrates

比较了微流体流量分配网络的两种设计方法-电学比拟法和流体拓扑优化方法,并对以出口流量为设计要求的微流体网络进行了流阻极小为目标的优化设计。对于电学比拟法,探讨了管道长度和弯曲度以及流体雷诺数等因素对设计结果的影响;对于流体拓扑优化法,阐述了优化模型以及实现的具体形式。从设计面积和误差等方面对电学比拟法和拓扑优化法的结果进行了分析比较。针对设计误差,对电学比拟法提出了一种基于参数优化的修正设计方法,结果显示这种方法可以有效消除电学比拟法的设计局限性,有利于进行高效的大规模高精度微流体网络设计。

Two design methods which are used to design microfluidic networks with specified outlet flowrates, electric circuit analogy and fluid topology optimization methods, are analyzed for the one inlet five outlets channel network. The design objective is specified as the minimization of fluid power dissipation. For the electric circuit analogy method, the design details, such as the influences of the length of channel, bending style and the reynolds number of the flow are discussed. For the topology optimization method, the optimization model and the iteration procedure are presented. The advantages and disadvantages of the above mentioned methods are discussed based on the designed channel networks. In order to improve the accuracy of the electric circuit analogy method, parameter optimization method which is suitable for large -scale network design is proposed.