铸造技术2012，Vol.33Issue(8)：913-917,5.
强制对流作用下纯Ni枝晶生长的相场法研究
Simulation on Dendritic Growth of Pure Ni Using Phase-field Model under Forced Flow
摘要
Abstract
The phase field model based on Wheeler model coupled with the.flow field was used to simulate dendrite growth of single and multi-dendrites of pure Ni by finite difference method. The effect of forced flow on dendrite morphology, temperature distribution and tip growth behavior of pure Ni was studied. The result shows that when the flow velocity is 14.76 m/s, in the case of single-dendrite growth, the upstream arms of dendrite grows fast, the tip velocity at steady state on the upstream is increased by about 47.14% compared with the case without flow. The downstream arms of it grows slow, the tip velocity at steady state on the upstream is decreased by about 49.72% compared with the case without flow. The simulated results are consistent with Ivanstov theory and test result. For multi-dendrites growth, the growth of dendrite arms on the preferred directions toward the out of upstream area is promoted, which make the principal branches and side branches develope. The growth of dendrite arms on the other preferred directions is inhibited, principal branches and side branches degenerate.关键词
相场法/强制对流/枝晶生长/凝固Key words
phase-field model/ forced flow/ dendrite growth/ solidification分类
矿业与冶金引用本文复制引用
袁训锋,丁雨田..强制对流作用下纯Ni枝晶生长的相场法研究[J].铸造技术,2012,33(8):913-917,5.基金项目
商洛学院博士启动基金资助项目(12SKY01-1) （12SKY01-1）
