The growth process of pores in aluminum during directional solidification was simulated by the multi-phase field method. First, the effect of solid-liquid interface moving speed (V) and temperature gradient (G) on pore size was investigated. We found that the simulation results coincided well with the actual experimental results. Second, V was changed during the formation of the lotus metal under constant G and the appropriate condition was determined for the pore to extend steadily. We confirmed that by controlling V to be negatively proportional to the pore growth rate, the pore could be extended while its width was kept constant.

中文翻译：

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相场模拟的莲花铝有效孔径控制方法

采用多相场法模拟了定向凝固过程中铝孔的生长过程。首先，研究了固液界面移动速度（V）和温度梯度（G）对孔径的影响。我们发现仿真结果与实际实验结果吻合得很好。其次，在荷花金属的形成过程中，在常数G下改变V，并确定适当的条件以使孔稳定地延伸。我们证实，通过将V控制为与孔的生长速度成负比例，可以使孔扩展而宽度保持恒定。