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The accuracy of a solid packing fraction model in recognizing zones of different dendritic structures

机译:固体堆积分数模型在识别不同树突结构区域中的准确性

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摘要

A front tracking method on a fixed control-volume grid, based on assumed dendrite tip kinetics, is applied to discuss the accuracy of a numerical model where the coherency solid fraction is used in the identification of diverse dendritic regions developing within a mushy zone during binary alloy solidification driven by diffusion and thermo-solutal buoyancy forces. It is shown that this critical value of a solid volume fraction is not constant but changes with time and along the border separating the regions.
机译:基于假设的枝晶尖端动力学,在固定控制量网格上的前部跟踪方法用于讨论数值模型的准确性,其中相干固体分数用于识别二元过程中在糊状区内形成的不同树枝状区域扩散和热溶质浮力驱动的合金凝固。结果表明,该固体体积分数的临界值不是恒定的,而是随时间并沿着分隔区域的边界而变化的。

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