摘要
将Level Set／Ghost方法应用于聚合物成型研究，实现了非等温情况下注射成型聚合物熔体充模阶段的动态模拟；得到了正确的流线分布和不同时刻的温度、压力等值线分布。对Level Set／Ghost方程的求解，空间方向采用高分辨率、稳定且无振荡的5WENO（the fifth—order weighted essentially non—oscillatory）格式进行离散，时间方向采用稳定的TVD-RK（total variation diminishing Runge Kutta）方法进行离散。物理量控制方程采用一般的有限差分格式进行数值求解。结果表明，Level Set／Ghost方法可以准确追踪非等温聚合物熔体前沿界面的位置，并能精确描述前沿界面的形状，同时可以实现动态流场物理量的准确模拟。
Level Set/Ghost method was introduced to capture the melt flow front accurately and the flow field analysis was presented. Level Set/Ghost equations were discretized by the fifth-order weighted essentially non-oscillatory scheme in spatial direction and the total variation diminishing method in temporal direction. On other hand, physical controlling equations were solved numerically by the general finite difference schemes. It showed that Level Set/Ghost method can capture the location accurately and shape of the melt flow front at different times which confirmed that the simulation of flow field was successful.
出处
《中国塑料》
CAS
CSCD
北大核心
2007年第5期53-57,共5页
China Plastics
基金
国家自然科学基金重大项目（10590353）
陕西省自然科学基金资助项目（2005A16）
