| 对流下二元合金凝固过程的相场法研究 |
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| 引用本文： | 范昌胜,邱文旭. 对流下二元合金凝固过程的相场法研究[J]. 陕西理工学院学报(自然科学版), 2011, 27(1): 6-10,20 |
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| 作者姓名： | 范昌胜 邱文旭 |
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| 作者单位： | 1. 陕西广播电视大学理工教学部,陕西,西安,710068
2. 西安工业大学北方信息工程学院基础部,陕西,西安,710025 |
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| 摘 要： | 采用耦合流场的相场模型,以Ni-Cu二元合金为例模拟金属非等温凝固和等温凝固时的枝晶生长,把两种模拟结果作比较。发现:两种模型得出的结果都与溶质再分配理论相符合;潜热的释放在一定程度上抑制枝晶的生长,使得非等温凝固时的平衡再分配浓度比等温凝固时低;非等温凝固的生长Peclet数与Oseen-Ivantsov理论值吻合得更好。
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| 关 键 词： | 相场模型 相变潜热 强迫对流 初始温度 |
The study of solidification process for binary alloy with convection by phase-field simulation |
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| FAN Chang-sheng,QIU Wen-xu. The study of solidification process for binary alloy with convection by phase-field simulation[J]. Journal of Shananxi University of Technology(Natural Science Edition), 2011, 27(1): 6-10,20 |
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| Authors: | FAN Chang-sheng QIU Wen-xu |
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| Affiliation: | 1.Department of Science and Technology Education,Shaanxi Radio and TV University,Xi′an 710068,China;2.Department of Basic Courses,North Institute of Information Engineering,Xi′an Technological University,Xi′an 710025,China) |
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| Abstract: | The phase-field model coupled with the convection field was used to simulate the dendrite growth of the alloy Ni-Cu during isothermal and non-isothermal processes,and the comparison was also made with the results.It shows that the two models are coincident with the solute redistribution theory,the latent heat released inhibites the growth of dendrite,and the concentration of solute redistribution is lower during non-isothermal process.In addition,the growth Peclet number using the non-isothermal process is ... |
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| Keywords: | phase-field model latent heat of phase change forced convection initial temperature |
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