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Modeling of Argon Gas Behavior in Continuous Casting of Steel

机译:钢连铸中氩气行为的建模

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In continuous casting of steel, argon gas injection is a popular method to reduce nozzle clogging. Multiphase turbulent flow of molten steel with argon gas through complicated-geometry nozzles increases the complexity of the flow dynamics. In this study, these complex multiphase turbulent flow behaviors are simulated in a lab-scale continuous caster using a new hybrid model that involves a Eulerian-Eulerian (EE) model coupled simultaneously with a Discrete Phase Model (DPM). The complex behavior of the argon gas including formation of gas pockets, intermittent shearing off of the gas pockets, volumetric expansion, coalescence and breakup of bubbles, and transport of the bubbles in both the nozzle and mold are all simulated. The model is validated with measurements on a benchmark experiment of liquid-metal argon flow in a laboratory-scale system. This hybrid model is a promising tool to estimate realistic bubble size distributions and multiphase flow in a real caster.
机译:在钢的连续铸造中,注入氩气是减少喷嘴堵塞的一种流行方法。钢水和氩气通过复杂几何形状的多相湍流增加了流动动力学的复杂性。在这项研究中,这些复杂的多相湍流行为是在实验室规模的连铸机上使用新的混合模型进行仿真的,该模型包括同时与离散相模型(DPM)结合的Eulerian-Eulerian(EE)模型。模拟了氩气的复杂行为,包括气穴的形成,气穴的间歇剪切,气泡的体积膨胀,聚结和破裂以及气泡在喷嘴和模具中的传输。该模型通过在实验室规模的系统中进行的液态金属氩流基准实验的测量结果进行了验证。该混合模型是一种有前途的工具,可用于估计实际脚轮中的实际气泡尺寸分布和多相流。

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