Abstract 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.

中文翻译：

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具有大量枝晶运动的多晶等轴凝固的二维大规模相场晶格 Boltzmann 模拟

摘要 在这项研究中，通过将主动参数跟踪和多 GPU 计算应用于相场晶格玻尔兹曼模型，实现了多晶等轴凝固的二维大规模模拟，该模型可以模拟固体运动、液体流动的多个枝晶的生长。 ，多种固体的碰撞和聚结，以及随后的晶粒生长。通过可扩展性评估证实，所开发的模拟方法显示出合理的并行效率。通过使用开发的方法，执行喷淋模拟，其中在计算域顶部生成的固体核随着生长成等轴枝晶而沉降并沉积在计算域底部。在模拟中，成功处理了多达 350 个的大量枝晶。