摘要
采用有限差分法对注塑过程中充填阶段的温度场的数值分析进行了研究 ,数学模型是基于非牛顿流体在非等温状态下广义Hele -Shaw流动 ,可预测非牛顿流体在任意形状薄壁型腔内流动时的温度场。对能量方程进行有限差分近似时 ,能量方程中的瞬态项和热传导项分别采用向后差分和隐式差分。为保证数值计算过程的稳定性 ,采用上风法处理对流项。
Numerical analysis of temperature field during filling stage of injection molding is investigated by using FDM method here. The model is based on the generalized Hele-Shaw flows of Non-Newtionian fluid under nonisothermal condition. The temperature field of Non-Newtonian fluid within thin cavities of arbitrary shape can be predicted. A backward form and an implicit form are used respectively for the transient item and conduction item in energy equation. In order to keep the numerical stability, the upwind method is required in handling convection item. Effects of mold temperatures and flow rates on temperature distribution are presented.
出处
《中国塑料》
CAS
CSCD
北大核心
2001年第6期55-59,共5页
China Plastics
基金
国家自然科学基金重点项目资助 (1963 2 0 0 4)
关键词
注射成型
温度场
充模
聚合物
injection molding
numerical analysis
temperature field
