Quantitative phase-field modeling of solidification at high Lewis number.
Quantitative phase-field modeling of solidification at high Lewis number.
复制标题
高路易斯数凝固的定量相场建模。
DOI：
10.1103/physreve.79.030601
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Rosam J
中科院分区：
文献类型：
--
作者：
Rosam J
使用稀二元合金非等温凝固的相场模型来研究固定过冷条件下生长速度、枝晶尖端半径和半径选择参数随路易斯数的变化。通过应用先进的数值技术，我们已经能够将分析扩展到 10 000 量级的路易斯数，这对于金属来说是现实的。当路易斯数从 1 增加到 10 000 时，发现半径选择参数有很大的变化。
A phase-field model of nonisothermal solidification in dilute binary alloys is used to study the variation of growth velocity, dendrite tip radius, and radius selection parameter as a function of Lewis number at fixed undercooling. By the application of advanced numerical techniques, we have been able to extend the analysis to Lewis numbers of order 10 000, which are realistic for metals. A large variation in the radius selection parameter is found as the Lewis number is increased from 1 to 10 000.