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首页> 外文期刊>Computer Modeling in Engineering & Sciences >Numerical Simulation of Melt Filling and Gas Penetration in Gas Assisted Injection Molding
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Numerical Simulation of Melt Filling and Gas Penetration in Gas Assisted Injection Molding

机译：气体辅助注射成型中熔体充填和气体渗透的数值模拟

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摘要

The governing equations of two-phase flows including gas and polymer melt are presented, which are solved using finite volume and domain extension methods with SIMPLEC technology. The melt filling and primary gas penetration in gas-assisted injection molding (GAIM) process are simulated, where the Cross-viscosity model is employed to describe the melt rheological behavior, and the CLSVOF (coupled Level Set and Volume of fluid) method is employed to capture the moving interfaces. In order to test and verify the coupled methods, melt filling in a rectangular plate with an insert is simulated, and the numerical results are in good agreement with those of the experiment. As a case study, the melt filling and gas penetration processes in a ring-shaped channel are simulated. The numerical results successfully depict some important phenomena, such as race-tracking effect, corner effect and the flow asymmetry of the gas penetration, which can deepen the understanding and studying of the GAIM process.
机译：提出了包括气体和聚合物熔体在内的两相流的控制方程，并通过有限体积和域扩展方法以及SIMPLEC技术对其求解。模拟了气体辅助注射成型（GAIM）过程中的熔体填充和一次气体渗透，其中使用交叉粘度模型描述了熔体的流变行为，并使用了CLSVOF（液位和液量的耦合）方法捕获移动界面。为了测试和验证耦合方法，模拟了在带有插入件的矩形板上熔融填充，并且数值结果与实验结果吻合良好。作为案例研究，模拟了环形通道中的熔体填充和气体渗透过程。数值结果成功地描述了一些重要现象，如种族跟踪效应，转角效应和气体渗透的流动不对称性，可加深对GAIM过程的理解和研究。

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