Numerical simulation of dendritic growth of magnesium alloys using phase-field method under forced flow

	Numerical simulation of dendritic growth of magnesium alloys using phase-field method under forced flow
	Yuan, Xun-Feng; Ding, Yu-Tian; Guo, Ting-Biao; Hu, Yong
刊名	Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
	2010-08-01
卷号	20 期号:8 页码:1474-1480
关键词	Computer simulation Flow of fluids Flow velocity Morphology Numerical methods Numerical models Phase transitions Concentration fields Dendrite morphology Dendritic growth Forced flows Phase field methods Phase field models Phase fields Six fold symmetry
ISSN号	10040609
英文摘要	Based on the diffusion Wheeler model which couples the temperature field, concentration field and flow field, the phase-field model for the magnesium alloys with hcp structure was established to simulate both of the single and multi-grain dendritic growths of magnesium alloys during solidification in a forced flow. The results show that when the flow velocity is 17.19 m/s, the growths of three directions on the upstream side are much faster than those of three directions on the downstream side, the tip velocity at steady state on the upstream is increased by about 78.0% compared with the case without flow, the tip velocity at the steady state on the downstream is decreased by about 53.7% compared with the case without flow. There exists much difference in the length of dendrite arm, so that the six-fold symmetry of the dendrite morphology is severely damaged. Under the case of the multi-grain, the grains grown face to face influence mutually and grow competitively. The dendrite arms of different dendrite are mutually inhibited, ultimately, form asymmetric dendrite morphology.
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/111230]
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. Numerical simulation of dendritic growth of magnesium alloys using phase-field method under forced flow[J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,2010,20(8):1474-1480.
APA	Yuan, Xun-Feng,Ding, Yu-Tian,Guo, Ting-Biao,&Hu, Yong.(2010).Numerical simulation of dendritic growth of magnesium alloys using phase-field method under forced flow.Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,20(8),1474-1480.
MLA	Yuan, Xun-Feng,et al."Numerical simulation of dendritic growth of magnesium alloys using phase-field method under forced flow".Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 20.8(2010):1474-1480.