A three-dimensional sharp interface model for the quantitative simulation of solutal dendritic growth

作者：Pan Shiyan; Zhu Mingfang^*

来源：Acta Materialia, 2010, 58(1): 340-352.

DOI：10.1016/j.actamat.2009.09.012

• Microstructure modeling
• Solutal dendritic growth
• Weighted mean curvature
• Three dimensions

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.

• 出版日期2010-1
• 单位东南大学