Simulation of Dendritic Crystal Growth of Pure Ni Using the Phase-field Model
Simulation of Dendritic Crystal Growth of Pure Ni Using the Phase-field Model
复制标题
利用相场模型模拟纯镍的枝晶生长
DOI：
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发表时间：
2010
影响因子：
3.6
通讯作者：
Hou, Hua
中科院分区：
文献类型：
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作者：
Zhao, Yuhong;Hou, Hua
采用相场模型对纯Ni过冷熔体中枝晶生长过程进行了数值模拟。对各向异性、过冷度和热噪声等因素进行了研究。模拟结果表明，随着各向异性程度的增加，枝晶尖端生长速度加快，枝晶结构特征更加明显；随着过冷程度的增加，枝晶尖端的稳定性被破坏，枝晶尖端发生分枝。搅拌功率可以促进枝晶的侧支化，但不影响枝晶的生长状态。
The phase-field model is used in the numerical simulation of dendritic crystal growth in supercooled melt of pure Ni.The factors of anisotropy,degree of supercooling and thermal noise is investigated in this paper.The simulated result shows that as the degree of anisotropy increases,the growth velocity of dendrite tip is accelerated and characteristic of dendritic structure is more obvious;As the degree of supercooling increases,stability of dendrite tip will be damaged,the dendrite tip branching-off will happen.Stirring power can promote side-branching,but does not affect growth state of dendritic crystal.