聚苯乙烯熔体通过矩形收缩口模的研究

On contraction flow of polystyrene melt through slit dies

在回顾了文献工作的基础上,本文使用Carreau本构方程模拟聚苯乙烯熔体的流变特性,用基于控制容积法的SIMPLEC算法求解二维流体力学基本方程,研究了聚苯乙烯熔体在矩形收缩口模中的不可压、非等温、稳态流动,获得了速度、压力、粘度、应力和温度的分布。计算结果可用于高分子注射过程中的口模设计。

The progress on the numerical modeling of polymer melts was reviewed briefly. Employing the Carreau constitutive equation to model the rheological properties of polystyrene melts and using the SIMPLEC algorithm based on the control-volume approach to solve the two-dimensional hydrodynamic equations, the incompressible, non-isotherm and steady-state flow of polystyrene melt in the convergent section of a slit die was simulated. The velocity, pressure, viscosity, stress and temperature fields are the primary results. The numerical results can be used to design die for polymer injection.