Numerical simulation of moving interfaces in gas-assisted injection molding process by Level Set approach

LI Qiang; OUYANG Jie; YANG Binxin; JIANG Tao

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Numerical simulation of moving interfaces in gas-assisted injection molding process by Level Set approach

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- Numerical simulation of moving interfaces in gas-assisted injection molding process by Level Set approach
- CIESC Journal Issue 2, Pages: 302-309(2010)
- 作者机构：
  
  西北工业大学理学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 February 2010，
  
  Published：05 February 2010
- 稿件说明：
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LI Qiang, OUYANG Jie, YANG Binxin, et al. Numerical simulation of moving interfaces in gas-assisted injection molding process by Level Set approach[J]. CIESC Journal, 2010, (2): 302-309.
DOI：

LI Qiang, OUYANG Jie, YANG Binxin, et al. Numerical simulation of moving interfaces in gas-assisted injection molding process by Level Set approach[J]. CIESC Journal, 2010, (2): 302-309. DOI：

摘要

给出气液两相流数学模型，选取Cross-WLF模型作为熔体的黏度模型，采用Level Set /SIMPLEC方法模拟了气体辅助注射成型中气体穿透过程，追踪到了不同时刻的运动界面(气熔界面和熔体前沿界面)，描述了运动过程中不同时刻速度和温度等重要物理量的分布情况，分析了熔体温度、气体延迟时间和注射压力对气体穿透时间和穿透长度的影响。数值结果表明，Level Set /SIMPLEC方法可以准确追踪气体穿透过程中的两个运动界面;熔体温度、延迟时间和气体注射压力对气体穿透长度有显著影响。

Abstract

The mathematical models of gas-liquid two-phase flow were presented

and the Cross-WLF model was selected as the viscosity model of the melt.The gas penetration process was simulated by using the Level Set /SIMPLEC methods

which could capture the moving interfaces at different times

including the gas-melt interface and the front of the melt.The physical features

such as velocity and temperature at different times were described.The influences of melt temperature

gas delay time and injection pressure on gas penetration time and penetration length were analyzed.The numerical results showed that the Level Set/SIMPLEC methods could precisely trace the two moving interfaces in the gas penetration process and the penetration length was affected significantly by melt temperature

gas delay time and injection pressure.

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