Phase-field simulation studies of multiple grains coupled with force flow field

doi:10.4028/www.scientific.net/AMR.915-916.1038

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	Phase-field simulation studies of multiple grains coupled with force flow field
	Feng, Li 1,2; An, Ling Min 1; Zhu, Chang Sheng 1; Lu, Yang 1; Xiao, Rong Zhen 1,2; Cheng, Bo 1
	2014
会议日期	March 8, 2014 - March 9, 2014
会议地点	Zhuhai, China
关键词	Algorithms Computer simulation Flow fields Forced convection Interface states Liquid metals Morphology Phase interfaces Dendrite growth Forced flows Multiple grains Phase field methods Simulation
卷号	915-916
DOI	10.4028/www.scientific.net/AMR.915-916.1038
页码	1038-1048
英文摘要	Coupling the force flow field with the phase field model for the isothermal growth of dendrite multiple grains, Sola algorithm is used to calculate the flow speed and pressure of liquid metal, double grid numerical method was used to reduce the calculation amount of computer simulation, the space factor and time factor were introduced to improve the accuracy of double grid numerical calculation, Taking Al-2%-Cu alloy for example, the dendrite growth process of the binary alloy was simulated under forced convection environment; Simulation results can capture the real dendrite growth and interactions of the liquid metal flow in the process of dendrite growth under forced convection environment: The flow of metal liquid affects the growth morphology of dendrite multi-grain. The flow of liquid metal changes the growth speed of dendrite tip in different directions for each dendrite, the greater of the liquid metal initial flow speed, the worse of dendrite morphology symmetry; different initial flow speeds result in the different distance between each dendrite. The metal liquid forced flow causes the instability of dendrite growth interface, it changes the degree of undercooling, composition, dendrite tip growth rate and the curvature radius of dendrite tip in the dendrite growth forefront interface. For the forefront dendrite growth interface free energy system, the dendrite tip growth speed and curvature radius were adjusted by the competitive growth of dendrite tips, thus reached a new stable state for the interface, which resulted in the emergence of bifurcation in dendrite tips. The liquid metal flow speed between different grains was affected by the relative position and morphology between different grains, and also affected by the initial inflow speed of the liquid metal. © (2014) Trans Tech Publications, Switzerland.
会议录	Advanced Materials Research
会议录出版者	Trans Tech Publications
语种	英语
ISSN号	10226680
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/117678]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
作者单位	1.Institute of Material Science and Engineering, Lanzhou University of Technology, Lanzhou, China; 2.Gansu Non-ferrous Metals and Composite Materials Engineering Technology Research Center, Lanzhou, China
推荐引用方式 GB/T 7714	Feng, Li,An, Ling Min,Zhu, Chang Sheng,et al. Phase-field simulation studies of multiple grains coupled with force flow field[C]. 见:. Zhuhai, China. March 8, 2014 - March 9, 2014.