Phase-field method of dendritic growth under convection

	Phase-field method of dendritic growth under convection
	Yuan, Xun-Feng; Ding, Yu-Tian; Guo, Ting-Biao; Hu, Yong; Tang, Xiang-Qian
刊名	Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
	2010-04-01
卷号	20 期号:4 页码:681-687
关键词	Binary alloys Flow fields Flow velocity Grain boundaries Nickel alloys Numerical methods Solidification Supercooling Temperature Temperature distribution Concentration fields Dendritic growth Forced flows Ni-Cu alloy Phase fields
ISSN号	10040609
英文摘要	Based on the Wheeler model, the phase-field model was built by coupling with the concentration field, temperature field and flow field. An explicit finite difference numerical method was used to solve the phase-field model equations and simulate both of the single and multi-grain dendritic growth of Ni-Cu alloys in a forced flow. The results show that the fluid flow alters the local heat and solute transfer at the solidification front, thus the dendritic growth behavior is significantly influenced. Under forced flow with a flow velocity of 6.43 m/s, the temperature and the concentration of the upstream dendritic crystal are low because of the undercooled melt flushing, the greater actual supercooling of the upstream dendritic crystal makes the dendritic crystal become fast, the tip velocity at steady state increases by about 28% compared with the case without flow. The heat and solute are enriched in the downstream, the temperature and the concentration of the downstream dendritic crystal are high, the less actual supercooling of downstream dendritic crystal makes the dendritic crystal growth become slow, the tip velocity at steady state decreases by about 26% compared with the case without flow.
语种	中文
出版者	Central South University of Technology
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150259]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
作者单位	State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China
推荐引用方式 GB/T 7714	Yuan, Xun-Feng,Ding, Yu-Tian,Guo, Ting-Biao,et al. Phase-field method of dendritic growth under convection[J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,2010,20(4):681-687.
APA	Yuan, Xun-Feng,Ding, Yu-Tian,Guo, Ting-Biao,Hu, Yong,&Tang, Xiang-Qian.(2010).Phase-field method of dendritic growth under convection.Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,20(4),681-687.
MLA	Yuan, Xun-Feng,et al."Phase-field method of dendritic growth under convection".Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 20.4(2010):681-687.