Abstract: On the basis of the engineering background of advanced polymer multi-component molding techniques, the fully three-dimensional unsteady non-isothermal theoretical model of multiphase-multilayer cavity filling flow is established in this paper and the corresponding stable numerical algorithm with fast convergence is put forward.By means of numerical simulation research, the quantitative comparisons of initiation and patterns of interface instability under various rheological parameters and process parameters are presented.Therefore, the initiation mechanism of interface instability is disclosured by theoretical analysis, and the dependence of interface instability on rheological parameters and process parameters are studied.The results of simulation have a good agreement with the experiment results given by Mohammad et al.

摘要： 基于聚合物多组分成型技术的工程背景建立了全三维非稳态非等温多相分层充模流动的理论模型，提出了求解理论模型的稳定高效的数值算法，通过数值模拟给出了不同流变性能参数、过程条件下聚合物多相分层充模流动成型过程的界面不稳定形成过程和不稳定界面形貌的定量对比，在此基础上通过理论分析，揭示了界面不稳定的产生机理，并研究了流变性能参数和过程条件对分层界面形貌和界面不稳定影响的规律.模拟研究表明，模拟结果与Mohammad等的实验研究结论相吻合.