| 过冷熔体枝晶生长的相场法数值模拟 |
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| 引用本文： | 刘晶峰,赵紫玉,方建成,江开勇.过冷熔体枝晶生长的相场法数值模拟[J].华侨大学学报(自然科学版),2009,30(3). |
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| 作者姓名： | 刘晶峰 赵紫玉 方建成 江开勇 |
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| 作者单位： | 华侨大学机电及自动化学院,福建泉州,362021 |
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| 基金项目： | 福建省自然科学基金，华侨大学科研启动基金 |
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| 摘 要： | 利用相场法模拟纯物质过冷熔体中的枝晶生长过程,研究各向异性强度、过冷度、扰动等对枝晶生长的影响.结果表明,扰动会促发侧向分枝的形成,但不影响枝晶尖端的稳态生长行为;随着各向异性强度的增大,枝晶尖端生长速度加快,枝晶结构特征愈加明显;过冷度的增加,枝晶尖端稳定性遭到破坏,甚至出现分叉.讨论网格步长对模拟结果的影响,指出在兼顾精度与效率的同时应优先选取粗网格.
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| 关 键 词： | 相场法 过冷熔体 枝晶生长 数值模拟 |
Numerical Simulation of Dendritic Growth into Undercooled Melt Using Phase-Field Method |
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| LIU Jing-feng,ZHAO Zi-yu,FAMG Jian-cheng,JIANG Kai-yong.Numerical Simulation of Dendritic Growth into Undercooled Melt Using Phase-Field Method[J].Journal of Huaqiao University(Natural Science),2009,30(3). |
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| Authors: | LIU Jing-feng ZHAO Zi-yu FAMG Jian-cheng JIANG Kai-yong |
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| Institution: | College of Mechanical Engineering and Automation;Huaqiao University;Quanzhou 362021;China |
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| Abstract: | Based on a phase-field model,a series of numerical calculations of dendritic growth into undercooled melt for a pure material were performed,and the influence of some physical parameters,including anisotropy strength,undercooling and noise factor,on dendritic growth were investigated.Results showed that the noise could trigger the growth of side-branches,but this did not influence the selection of the tip operating state.The greater the anisotropy strength,the faster the tip velocity and the more obvious th... |
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| Keywords: | phase-field method undercooled melt dendritic growth numerical simulation |
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