Two-dimensional large-scale phase-field lattice Boltzmann simulation of polycrystalline equiaxed solidification with motion of a massive number of dendrites
Two-dimensional large-scale phase-field lattice Boltzmann simulation of polycrystalline equiaxed solidification with motion of a massive number of dendrites
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DOI：
10.1016/j.commatsci.2020.109639
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发表时间：
2020-06
影响因子：
3.3
通讯作者：
S. Sakane;T. Takaki;M. Ohno;Y. Shibuta;T. Aoki
中科院分区：
文献类型：
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作者：
S. Sakane;T. Takaki;M. Ohno;Y. Shibuta;T. Aoki
本研究通过对相场晶格玻尔兹曼模型进行主动参数跟踪和多gpu计算，实现了多晶等轴凝固的二维大规模模拟，该模型可以模拟多枝晶的固相运动生长、液体流动、多固体的碰撞合并以及随后的晶粒生长。通过可扩展性评估，验证了所提出的仿真方法具有合理的并行效率。利用该方法进行了阵雨模拟，计算域顶部产生的固体核随着生长而沉降为等轴枝晶，并沉积在计算域底部。在模拟中，大量的树突（多达350个）被成功处理。
In this study, two-dimensional large-scale simulation of polycrystalline equiaxed solidification is enabled by applying an active parameter tracking and multiple GPUs computation to the phase-field lattice Boltzmann model, which can simulate growth of multiple dendrites with solid motion, liquid flow, collision and coalescence of multiple solids, and subsequent grain growth. It was confirmed that the developed simulation method shows a reasonable parallel efficiency through scalability evaluations. By using the developed method, showering simulations are performed, in which solid nuclei generated at the top of the computational domain settle down with growth into equiaxed dendrite and deposit on the bottom of the computational domain. In the simulations, a massive number of dendrites, up to 350, is successfully treated.