通过自适应有限元法求解相场模型,对过冷熔体中自由枝晶生长行为进行了数值模拟.自适应有限元法可减少计算量,提高求解速度,并同时降低存储空间的需求.模拟结果表明,随着各向异性系数ε4的增加,枝晶生长速度Vtip线性增大,而尖端半径rtip以指数方式减小.进一步研究表明界面稳定性系数σ*随各向异性系数ε4的增大而增大.
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