| 界面动力学系数影响枝晶生长的相场模拟 |
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| 引用本文： | 丁雨田,袁训锋,胡勇.界面动力学系数影响枝晶生长的相场模拟[J].热加工工艺,2008,37(20). |
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| 作者姓名： | 丁雨田 袁训锋 胡勇 |
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| 作者单位： | 兰州理工大学材料科学与工程学院,甘肃兰州,730050;甘肃省有色金属新材料国家重点实验室,甘肃兰州,730050 |
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| 摘 要： | 利用相场法对纯金属熔体中的枝晶生长进行了模拟；研究了界面动力学系数取值的影响因素及其取值对枝晶尖端生长速度和尖端半径的影响。结果表明：界面动力学系数的取值由相场和温度场的耦合系数、热扩散系数、界面厚度、界面原子运动时间变量等参数综合决定，随着界面动力学系数的增加，枝晶尖端生长速度减小，尖端半径增大。
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| 关 键 词： | 相场模型 界面动力学 枝晶 |
Simulation on Phase Field Model of Effect of Interface Kinetic Coefficient on Dendrite Growth |
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| DING Yutian,YUAN Xunfeng,HU Yong.Simulation on Phase Field Model of Effect of Interface Kinetic Coefficient on Dendrite Growth[J].Hot Working Technology,2008,37(20). |
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| Authors: | DING Yutian YUAN Xunfeng HU Yong |
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| Abstract: | The dendrite growth of pure metal was simulated by phase field model (PFM). The effects of interface kinetic coefficient on the dendrite tip velocity and dendrite tip radius,and the influence factors which relate the value of interface kinetic coefficient were studied. The results show that the value of interface kinetic coefficient is determined synthetically by the coupling coefficient between the temperature field and the phase field,the thermal diffusivity coefficient,the interface width,the time parame... |
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| Keywords: | phase field model interface kinetic dendrite |
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