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首页> 外文期刊>ISIJ international >An Assessment of Fluid Flow Modelling and Residence Time Distribution Phenomena in Steelmaking Tundish Systems
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An Assessment of Fluid Flow Modelling and Residence Time Distribution Phenomena in Steelmaking Tundish Systems

机译：炼钢中间包系统中流体流动模型和停留时间分布现象的评估

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A summary of computational work reported in the literature on tundish hydrodynamics has been presented wherein, it is shown that a diverse range of both computational (e.g., nodal configurations, boundary conditions, inlet turbulence etc.) and physical parameters (e.g., size, number of strands, inlet mass flow rates etc.) were applied. Accordingly, the conclusions drawn were found to vary from one study to another. In the present work, an attempt has therefore been made to assess computationally the role of various mathematical model parameters. To this end, mathematical model results were validated against experimental measurements on Residence Time Distribution (RTD) parameters derived from water model tundish. Experimental measurements of RTD were carried out continuously by monitoring conductivity of water at the tundish exit port on a digital computer using a DAS interface. On the other hand, numerical calculations were carried out via the commercial CFD (Computational Fluid Dynamics) software FLUENT, 6.0. The combined experimental and computational study indicated that a sufficiently small grid resolution (control volume of the order of 10~(-6)m~3) is necessary to arrive at a practical grid independent solution. Furthermore, Reynolds stress model was found to simulate RTD in the system somewhat superior to the standard coefficient k-e model. Through comparison of the predicted results with experimental measurements, a set of optimal mathematical model configurations was deduced. It was demonstrated that mathematical model configured in this work is sufficiently reliable and robust as this leads to estimates of RTD parameters (e.g., t_(min), t_(max), t_(mean)) close to experimental measurements in a tundish with and without flow modifiers.
机译：提出了一份关于中间包水动力学的文献报道的计算工作的总结，其中表明计算（例如节点结构，边界条件，入口湍流等）和物理参数（例如大小，数量）的变化范围很大股数，入口质量流量等）。因此，发现得出的结论因一项研究而异。因此，在当前的工作中，已经进行了尝试以计算方式评估各种数学模型参数的作用。为此，针对从水模型中间包导出的停留时间分布（RTD）参数的实验测量结果对数学模型结果进行了验证。通过使用DAS接口在数字计算机上的中间包出口处监控水的电导率，连续进行RTD的实验测量。另一方面，通过商用CFD（计算流体动力学）软件FLUENT 6.0进行了数值计算。实验和计算研究相结合，表明需要足够小的网格分辨率（控制量为10〜（-6）m〜3数量级）才能获得实用的网格无关解决方案。此外，发现雷诺应力模型可以在系统中模拟RTD，其效果优于标准系数k-e模型。通过将预测结果与实验测量值进行比较，得出了一组最佳数学模型配置。事实证明，在这项工作中配置的数学模型具有足够的可靠性和鲁棒性，因为这会导致RTD参数（例如t_（min），t_（max），t_（mean））接近中间包中的实验测量值。没有流量调节器。

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