(1. 中南大學(xué) 數(shù)學(xué)科學(xué)與計(jì)算技術(shù)學(xué)院，長(zhǎng)沙 410083；2. 北京科技大學(xué) 材料科學(xué)與工程學(xué)院，北京 100083；3. 中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410083)
摘 要:
關(guān)鍵字: 粉末注射成形；微流邊界層；模壁凝固層；數(shù)值模擬
（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
