A three-dimensional sharp interface model for the quantitative simulation of solutal dendritic growth
A three-dimensional sharp interface model for the quantitative simulation of solutal dendritic growth
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DOI：
10.1016/j.actamat.2009.09.012
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发表时间：
2010-01-01
期刊：
影响因子：
9.4
通讯作者：
Zhu, Mingfang
中科院分区：
文献类型：
--
作者：
Pan, Shiyan;Zhu, Mingfang
建立了一个三维尖锐界面模型来模拟低Peclet数区的溶质枝晶生长。该模型采用先前提出的溶质平衡方法来计算固/液界面的演化。为了描述三维枝晶生长的特定晶体取向，提出了一种结合表面能各向异性的加权平均曲率算法，可以直观地模拟不同取向的三维枝晶。通过将模拟结果与单枝晶和多枝晶生长的分析预测和实验数据进行比较，验证了所提出的模型的定量能力。该模型有效地再现了具有不同取向和良好侧枝的逼真的三维多等轴和柱状枝晶。(C)2009年Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
A three-dimensional (3-D) sharp interface model is developed to simulate the solutal dendritic growth in the low Peclet number regime. The model adopts a previously proposed solutal equilibrium approach to calculate the evolution of the solid/liquidinterface. To describe specific crystallographic orientations of 3-D dendritic growth, a weighted mean curvature algorithm incorporated with the anisotropy of surface energy is proposed, allowing the simulation of 3-D dendrites with various orientations in a straightforward manner. The model validation is performed by comparing the simulations with the analytical predictions and experimental data for both single and multi-dendritic growth, which demonstrates the quantitative capabilities of the proposed model. The model efficiently reproduces realistic 3-D multi-equiaxed and columnar dendrites with various orientations and well-developed side branches. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.