GPU-accelerated 3D phase-field simulations of dendrite competitive growth during directional solidification of binary alloy
GPU-accelerated 3D phase-field simulations of dendrite competitive growth during directional solidification of binary alloy
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DOI：
10.1088/1757-899x/84/1/012063
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发表时间：
2015-06
期刊：
影响因子：
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通讯作者：
S. Sakane;T. Takaki;M. Ohno;T. Shimokawabe;Takayuki Aoki
中科院分区：
文献类型：
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作者：
S. Sakane;T. Takaki;M. Ohno;T. Shimokawabe;Takayuki Aoki
相场方法已成为模拟枝晶生长的最强大的数值方案。然而，由于涉及大量计算成本，迄今为止进行的大多数枝晶生长相场模拟仅限于二维或三维单个枝晶。为了表达实际的凝固微观结构，应同时计算具有不同优选生长方向的多个枝晶。在本研究中，为了实现大规模相场枝晶生长模拟，我们开发了一种使用多个图形处理单元的相场代码，其中采用了二元合金凝固的定量相场方法和定向凝固的移动框架算法。首先，我们对开发的并行代码进行了强扩展和弱扩展测试。然后，对三维二元合金双晶中的枝晶竞争生长进行了模拟，并研究了三维空间中的枝晶相互作用。
Phase-field method has emerged as the most powerful numerical scheme to simulate dendrite growth. However, most phase-field simulations of dendrite growth performed so far are limited to two-dimension or single dendrite in three-dimension because of the large computational cost involved. To express actual solidification microstructures, multiple dendrites with different preferred growth directions should be computed at the same time. In this study, in order to enable large-scale phase-field dendrite growth simulations, we developed a phase-field code using multiple graphics processing units in which a quantitative phase-field method for binary alloy solidification and moving frame algorithm for directional solidification were employed. First, we performed strong and weak scaling tests for the developed parallel code. Then, dendrite competitive growth simulations in three-dimensional binary alloy bicrystal were performed and the dendrite interactions in three-dimensional space were investigated.