摘要
把计算流体动力学的多相流概念及两相流模型引入到粉末注射成形领域,介绍了描述粉末-粘结剂充模流动过程的单流体模型、双流体模型及欧拉-拉格朗日模型,并简要分析了各种模型的特点.分析表明,双流体模型相对于单流体模型更有利于监视两相分离、粉末聚集等出现在粉末注射成形过程中的特殊现象,并且比欧拉-拉格朗日模型更容易收敛.
The conception of multiphase flow and the two-phase flow models were introduced into the field of powder injection molding （PIM）. The single-fluid model, two-fluid model and Eulerian-Lagrangain model for describing the powder-binder filling flow process were discussed. The characteristics of each model were briefly analyzed. Simulation results showed that the two-fluid model was fitter than the single-fluid model for describing the powder segregation, powder concentration and other special phenomena arising in PIM. Furthermore, the two-fluid model is easier to reach convergent than the Eulerian-Lagrangain model in simulating the PIM process.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2007年第7期717-720,共4页
Journal of University of Science and Technology Beijing
基金
国家重点基础研究发展规划项目(No.G2000067203)
国家杰出青年科学基金资助项目(No.50025412)
高等学校博士学科点专项科研基金资助项目(No.99053310)
关键词
粉末注射成形
计算机模拟
多相流
两相流模型
powder injection molding
computational simulation
multiphase flow
two-phase flow model
