微纳层叠聚丙烯腈凝胶流动特性的数值模拟研究

建立了层叠流道的三维模型和有限元网格模型，根据流变测试数据，采用Polymat对物料的黏度模型参数进行拟合，并利用Polyflow软件对聚丙烯腈（PAN）凝胶在层叠流道内的三维等温流动过程进行了数值模拟分析。研究发现，当入口流量增大时，层叠流道出口速度的不均匀性增加；沿流动方向流道内压力逐渐降低，并在出口处降低至同一最低值；流道进出口压力差与入口流量大小具有正相关性；在流道的中心截面上剪切速率分布均匀，波动较小。

Numerical Simulation of Polyacrylonitrile Gel Flow Characteristics in Laminated Runner

A 3D and finite element mesh model of flow channel was established， and then Polymat was used to fit the parameters of the material according to the rheological test results. The Polyflow software was used to analyze the numerical simulation of the 3D isothermal flow process of polyacrylonitrile gel in a channel. The results indicated that the outlet velocity of the channel was more uneven as the inlet flow increased. The pressure in the channel gradually decreased along the flow direction and decreases down to the same minimum value at the outlet. The inlet and outlet pressure difference of the channel has a positive correlation with the inlet flow rate. The shear rate was uniformly distributed on the central section of the channel under a small fluctuation range.