材料工程Issue(10)：5-10,6.
强制对流作用下多枝晶生长的相场法研究
Phase-field Method of Multi-dendrites Growth Under Forced Flow
摘要
Abstract
The phase-field model coupled with the concentration field, temperature field and flow field is used to simulate multi-dendrites growth of Ni-Cu alloys in a forced flow. The morphologies of den-drites and distribution of temperature and concentration is studied. The result shows that fluid flow alters the local heat and concentration transfer at the solidification front, and effects the growth of the dentrite. Because of the undercooled melt flushing, the temperature and concentration of the upstream dendrite are low, making the tip of dendrite to grow faster; the temperature and the concentration of the downstream dendrite are high, making the tip of dendrite to grow slow. Due to the flow and multi-dendrites affect each other the crystal grows into asymmetrical dentrite morphologies. In addition, the fluid flow changed the preferred growth direction of dendrite which is not parallel to flow, making it tilts towards the upstream direction.关键词
相场法/强制对流/多枝晶/凝固Key words
phase field/forced flow/multi-dendrite/solidification分类
矿业与冶金引用本文复制引用
袁训锋,丁雨田..强制对流作用下多枝晶生长的相场法研究[J].材料工程,2011,(10):5-10,6.基金项目
兰州市科技局基金(2009-1-9) （2009-1-9）
