微观结点数目对显微偏析数值模拟的影响  

Discussion About Influence of Microgrid Number on Microsegregation Simulation

作　　者：刘永刚[1] 孙瑜[1] 孙国雄[1] 

机构地区：[1]东南大学机械系,南京210096

出　　处：《中国工程科学》2004年第2期77-81,共5页Strategic Study of CAE

基　　金：国家自然科学基金资助项目 ( 5 99740 11)

摘　　要：凝固过程微观数值模拟是目前材料学科研究的一个热点 ,其中显微偏析数值模拟具有重要的指导意义 ,国内在此研究方向上尚处于起步阶段。研究了显微偏析数值模拟中微观结点数目对计算结果的影响 ,并与试验结果进行了对照 ,指出基于迭代方法的显微偏析模拟结果与微观时间步数之间的关系为弱影响 。Micro simulation of solidification process is one of the focuses in material field, and simulation on microsegregation forming has important effect on directing materials processing. But papers about this field were seldom found on domestic publications. Influence of micro time steps on microsegregation simulation results was investigated in this paper and it is pointed out that the relation between the micro time steps and the microsegregation simulation results is weak for iterative method based microsegregation simulation. It is not necessary for using a large number of micro grids to converge the calculated results.

关 键 词：显微偏析 数值模拟 微观结点 

分 类 号：TG111.4[金属学及工艺—物理冶金]