A FIXED GRID FRONT-TRACKING MODEL OF THE GROWTH OF A COLUMNAR FRONT AND AN EQUIAXED GRAIN DURING SOLIDIFICATION OF AN ALLOY
A FIXED GRID FRONT-TRACKING MODEL OF THE GROWTH OF A COLUMNAR FRONT AND AN EQUIAXED GRAIN DURING SOLIDIFICATION OF AN ALLOY
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DOI：
10.1080/10407790490430606
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发表时间：
2004-05
期刊：
影响因子：
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通讯作者：
D. Browne;J. D. Hunt
中科院分区：
文献类型：
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作者：
D. Browne;J. D. Hunt
在一种新的方形结晶器中的合金凝固模型中，由前沿跟踪技术跟踪的界面代表了一条连接固态枝晶生长尖端的曲线。耦合热方程通过欧拉控制体积公式求解。在没有对流的情况下，对柱状晶前沿和单晶等轴晶的形核和非平衡生长过程进行了模拟和动力学模拟。这是向计算高效的完全直接数值模拟铸造过程中的晶粒组织迈出的重要一步。
In a new model of alloy solidification in a square mold, the interface being followed by a front-tracking technique is representative of a curve joining the tips of growing solid dendrites. The coupled heat equation is solved via an Eulerian control-volume formulation. In the absence of convection, the nucleation and nonequilibrium growth of both a front of columnar grains and a single equiaxed grain have been modeled and animated. This is a major step toward the computationally efficient complete direct numerical simulation of the developing grain structure in a casting process.