| Dendritic Morphology Simulation Using the Phase Field Method |
| |
| 引用本文： | 张光跃,荆涛,柳百成. Dendritic Morphology Simulation Using the Phase Field Method[J]. 清华大学学报, 2003, 8(1): 79-82 |
| |
| 作者姓名： | 张光跃 荆涛 柳百成 |
| |
| 作者单位： | DepartmentofMechanicalEngineering,TsinghuaUniversity,Beijing100084,China |
| |
| 基金项目： | Supported by the National Natural Science Foundationof China ( Nos.5 9990 470 and 5 0 0 0 5 0 11) and the StateKey Fundamental Research Project of MOST ( No.G2 0 0 0 6 72 0 8- 3) |
| |
| 摘 要： | Dendritic morphology was simulated using a macro- and micro-coupled method. Since the microstructure of a whole casting cannot be easily analyzed, a scheme was developed to calculate the temperature of the whole casting with the microstructure analyzed by selecting one cell in the central region of the casting. The heterogeneous nucleation was described using a Gaussian distribution with the dendritic growth controlled by the solution of the phase field equation. The initial temperature distribution in the microdomain was obtained by interpolating the cell temperatures near the selected cell with the interface undercooling assumed to be the sum of thermal, solute, and curvature effects. The solute distribution was calculated from the mixed solute conservation equation with noise introduced to produce the side branches. The simulation results agree well with experimental results.
|
| 关 键 词： | 铸件 枝曼状形态模拟 相区方法 显微结构 数字模拟 宏耦合方法 |
Dendritic Morphology Simulation Using the Phase Field Method |
| |
| ZHANG Guangyue. Dendritic Morphology Simulation Using the Phase Field Method[J]. Tsinghua Science and Technology, 2003, 8(1): 79-82 |
| |
| Authors: | ZHANG Guangyue |
| |
| Abstract: | Dendritic morphology was simulated using a macro- and micro-coupled method. Since the microstructure of a whole casting cannot be easily analyzed, a scheme was developed to calculate the temperature of the whole casting with the microstructure analyzed by selecting one cell in the central region of the casting. The heterogeneous nucleation was described using a Gaussian distribution with the dendritic growth controlled by the solution of the phase field equation. The initial temperature distribution in the micro- domain was obtained by interpolating the cell temperatures near the selected cell with the interface undercooling assumed to be the sum of thermal, solute, and curvature effects. The solute distribution was calculated from the mixed solute conservation equation with noise introduced to produce the side branches. The simulation results agree well with experimental results. |
| |
| Keywords: | phase field method microstructure numerical simulation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
