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

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

	Phase-field simulation studies of multiple grains coupled with force flow field
	Feng, Li1,2 ; An, Ling Min 1; Zhu, Chang Sheng 1; Lu, Yang 1; Xiao, Rong Zhen 1,2; Cheng, Bo1
	2014
会议名称	2014 2nd International Forum on Mechanical and Material Engineering, IFMME 2014
会议录名称	Advanced Materials Research
卷号	915-916
页码	1038-1048
会议日期	March 8, 2014 - March 9, 2014
会议地点	Zhuhai, China
出版者	Trans Tech Publications
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.
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
DOI	10.4028/www.scientific.net/AMR.915-916.1038
收录类别	EI
语种	英语
EI入藏号	20142217770035
EI主题词	Grain growth
ISSN	10226680
来源库	Compendex
分类代码	531.1 Metallurgy - 531.2 Metallography - 631.1 Fluid Flow, General - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 921 Mathematics - 931 Classical Physics; Quantum Theory; Relativity - 931.2 Physical Properties of Gases, Liquids and Solids - 932 High Energy Physics; Nuclear Physics; Plasma Physics - 951 Materials Science
引用统计	无
文献类型	会议论文
条目标识符	https://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
第一作者单位	兰州理工大学
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]:Trans Tech Publications,2014:1038-1048.