Slag entrainments in a continuous casting mold result in serious defects in steel products. Most previous studies concentrated on the magnitude of meniscus velocity or transient roll cell motion to investigate the cause of slag entrainment. However, slag entrainment is more directly connected with the meniscus vortex, which accompanies a meniscus deformation (e.g., vortex dimple or core). Most previous numerical studies on the meniscus vortex were conducted using a single-phase flow analysis; thus, the effect of meniscus deformation was never examined. This study conducts a multiphase flow simulation by employing a free-surface-capturing technique, and succeeds in reproducing the meniscus vortex core in the mold. The core depth and onset condition for the meniscus vortex obtained by the present numerical study show good agreements with the experimental results. The vorticity distribution on the mold meniscus and meniscus vortex patterns according to flow asymmetry are also dealt with herein.

中文翻译：

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连铸结晶器水模弯液面涡芯的数值与试验研究

连铸结晶器中的夹渣会导致钢产品中出现严重缺陷。以前的大多数研究都集中在弯液面速度或瞬态滚动单元运动的幅度上，以调查夹渣的原因。然而，夹渣与弯液面涡流更直接相关，弯液面涡流伴随着弯液面变形（例如，涡流凹坑或核心）。大多数以前对弯月面涡旋的数值研究是使用单相流分析进行的。因此，从未检查过弯月面变形的影响。本研究采用自由表面捕获技术进行多相流模拟，并成功再现了模具中的弯月面涡核。通过本数值研究获得的弯月面涡旋的核心深度和起始条件与实验结果显示出良好的一致性。根据流动不对称性，模具弯液面上的涡量分布和弯液面涡流图案也在这里处理。