(1. 中南大学 数学科学与计算技术学院，长沙 410083；2. 北京科技大学 材料科学与工程学院，北京 100083；3. 中南大学 粉末冶金国家重点实验室，长沙 410083)
摘 要:
关键字: 粉末注射成形；微流边界层；模壁凝固层；数值模拟
（1. School of Mathematical Science and Computing Technology, Central South University, Changsha 410083, China;2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;3. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:The existence of solidification layer on the wall of cavity in powder injection molding filling process by boundary layer theory of microflow was reviewed. The structure of solidification layer on the wall of cavity was analyzed. Based on the computation method of L.Prandtl boundary layer and the definition of boundary layer of microflow, the mathematical model of solidification layer on the wall of cavity in powder injection molding filling process was established. The results of the numerical simulation indicate that the thickness of the solidification layer on the wall of feed channel can be nicely described by the mathematical model. Some useful information for predicting and controlling the solidification on the wall of cavity can be supplied by the mathematical model established.
Key words: powder injection molding; boundary layer of microflow; solidification layer on wall of cavity; numerical simulation
