捕获溶质扩散层边界法优化二维枝晶生长的相场法模拟

龙文元; 王刚; 尧军平; 王伟

doi:10.15980/j.tzzz.2014.04.001

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捕获溶质扩散层边界法优化二维枝晶生长的相场法模拟
Optimized Simulation of Two Dimensional Dendritic Growth by Capturing the Solute Diffusion Layer’s Boundary
2014年34卷第4期页码：378-380
纸质出版日期： 2014 ，
DOI： 10.15980/j.tzzz.2014.04.001

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[1]龙文元,王刚,尧军平,王伟.捕获溶质扩散层边界法优化二维枝晶生长的相场法模拟[J].特种铸造及有色合金,2014,34(04):378-380.

Long Wenyuan, Wang Gang, Yao Junping, et al. Optimized Simulation of Two Dimensional Dendritic Growth by Capturing the Solute Diffusion Layer’s Boundary[J]. Special Casting & Nonferrous Alloys, 2014,34(4):378-380.
[1]龙文元,王刚,尧军平,王伟.捕获溶质扩散层边界法优化二维枝晶生长的相场法模拟[J].特种铸造及有色合金,2014,34(04):378-380. DOI： 10.15980/j.tzzz.2014.04.001.

Long Wenyuan, Wang Gang, Yao Junping, et al. Optimized Simulation of Two Dimensional Dendritic Growth by Capturing the Solute Diffusion Layer’s Boundary[J]. Special Casting & Nonferrous Alloys, 2014,34(4):378-380. DOI： 10.15980/j.tzzz.2014.04.001.

摘要

在枝晶生长相场法模拟中

提出了捕获溶质扩散层边界法进行算法的优化。即不必每一步对计算区域内所有网格进行计算

以通过减少计算循环次数来节省模拟计算时间。在二维网格x和y方向上捕获离晶体中心最远溶质扩散层边界

计算时只对边界范围以内的网格进行计算。通过该方法可减少相场模型的计算时间

模拟二维枝晶生长的形貌和溶质场分布与优化前基本一致。

Abstract

The method of capturing the solute diffusion layer’s boundary was proposed in the process of dendritic growth simulating by the phase-field method.It not necessary to calculate all grid of calculation area

and the computational time can be saved by the reduction of computation’s loop.The solute diffusion layer’s boundary is captured in the direction of two-dimensional grid xand y.The calculations are performed only in the grid within the boundary

therefore the calculation time of phase-field model is decreased greatly.The simulation results of dendrite morphology and the solute field in two-dimensional dendritic growth are agreement well with that before algorithm optimization.