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枝晶生长的相场法数值模拟

DOI: 10.11830/ISSN.1000-5013.2010.01.0006

Keywords: 枝晶生长, 相场法, 过冷熔体, 数值模拟, 形貌

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Abstract:

利用一个简单的相场模型,对过冷熔体中枝晶的生长形貌进行数值模拟,定性分析各向异性强度、无量纲潜热及扰动因子等对枝晶形貌的影响.结果表明,枝晶主干生长速度随着各向异性强度的增大而增大,并且枝晶结构强烈依赖于各向异性强度; 随着无量纲潜热的增大,晶体生长过程中枝晶结构特征愈加明显; 扰动对枝晶结构特征有一定的影响,随着扰动因子的增加,枝晶间竞争生长加剧.

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