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首页> 外文期刊>ISIJ international >Modeling of Transient Two-Phase Flow in a Continuous Casting Mold Using Euler-Euler Large Eddy Simulation Scheme
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Modeling of Transient Two-Phase Flow in a Continuous Casting Mold Using Euler-Euler Large Eddy Simulation Scheme

机译：基于Euler-Euler大涡模拟方案的连铸结晶器瞬态两相流建模

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Euler-Euler Large Eddy Simulation (EELES) scheme has been developed to simulate the two-phase flow of argon gas and molten steel in slab continuous casting mold. The Euler-Euler approach is used to describe the equations of motion of the two-phase flow. The drag force, lift force and virtual mass force are incorporated in this model. Both turbulence of argon gas and molten steel are simulated using large eddy simulation (LES). Simulation results agree acceptably well with the water model experimental measurements of instantaneous flow structures. The flow pattern in the lower recirculation zone is expected to be asymmetrical between the left and right sides of the mold. The flow pattern is changeover; the direction of flow deviation is different from time to time. The time intervals for changeover appeared to vary randomly. The long-term asymmetry in the lower roll is due to the turbulent nature instead of the variation of other operating parameters. The turbulent flow in the mold includes multiple vortices. Those vortexes make the flow field to be more complex. Two typical transient flow structures, consisting of clockwise or counterclockwise rotational direction vortices, are found in the upper roll.
机译：开发了欧拉-欧拉大涡模拟（EELES）方案，以模拟板坯连铸结晶器中氩气和钢水的两相流。欧拉-欧拉方法用于描述两相流的运动方程。该模型包含了阻力，升力和虚拟质量力。使用大涡模拟（LES）对氩气和钢水的湍流进行模拟。模拟结果与瞬时流结构的水模型实验测量结果吻合良好。下部再循环区中的流型预计在模具的左侧和右侧之间是不对称的。流模式是转换;流动方向有时会有所不同。切换的时间间隔似乎随机变化。下辊的长期不对称性是由于湍流特性而不是其他操作参数的变化引起的。模具中的湍流包括多个涡流。这些漩涡使流场变得更加复杂。在上辊中发现了两种典型的瞬态流动结构，包括顺时针或逆时针旋转方向的涡流。

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