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首页> 外文期刊>ISIJ international >Numerical Simulation of Heat Transfer and Steel Shell Growth in a Curved Slab Mold
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Numerical Simulation of Heat Transfer and Steel Shell Growth in a Curved Slab Mold

机译：弯曲板坯模具内传热和钢壳生长的数值模拟

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摘要

The main aims of the present research is the study of steel flow under temperature gradient to understand the convective effects on the flow patterns inside the mold and its effects on the shell growth kinetics under more realistic conditions. In order to achieve this, a non-isothermal mathematical model is developed based on the Navier-Stokes equations together with the κ-ε turbulence model, the volume of fluid model to solve the multiphase system air-slag-steel and a solidification model. Comparing isothermal and non-isothermal results, it is observed that the buoyancy forces are large enough to modify radically the lower recirculation flows inducing shorter and upwards streams; however, the upper recirculation flows do not show strong changes. Shell growth does not necessarily follow a steady parabolic growth and it is more dependent on the washing effects of convective steel streams. Therefore, shell thickness reports heterogeneous and irregular magnitudes through the four faces of the slab. In addition, mold curvature provides uneven shell growth in the inner side of the slab while in the outer side the shell thickness observes a more regular growth. Shell thickness is irregular and discontinuous all around the upper periphery of the slab; therefore, this region is very sensitive to cracking. Finally, the numerical results for liquid steel solidification are compared to published results of shell growth showing a very good qualitative agreement.
机译：本研究的主要目的是研究温度梯度下的钢流动，以了解在更现实的条件下对模具内部流动模式的对流影响及其对壳生长动力学的影响。为此，基于Navier-Stokes方程，κ-ε湍流模型，求解多相系统气渣钢的流体体积模型和凝固模型，开发了一个非等温数学模型。比较等温和非等温结果，可以发现浮力足够大，可以从根本上改变较低的再循环流量，从而导致较短和向上的水流。但是，上部再循环流没有显示出强烈的变化。壳的生长并不一定遵循抛物线的稳定增长，它更多地取决于对流钢流的洗涤效果。因此，壳厚度通过板的四个面报告了不均匀的大小。另外，模具曲率在板的内侧提供不均匀的壳生长，而在外侧，壳厚度观察到更规则的增长。壳的厚度是不规则的，并且在板坯的整个上周边都是不连续的因此，该区域对裂纹非常敏感。最后，将钢水凝固的数值结果与已发表的壳生长结果进行了比较，显示出很好的定性一致性。

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  • 来源
    《ISIJ international》 |2013年第5期|809-817|共9页
  • 作者

    Saul GARCIA-HERNANDEZ; Jose de Jesus BARRETO; Rodolfo D. MORALES; Hugo ARCOS-GUTIERREZ;

  • 作者单位

    Instituto Tecnologico de Morelia, Metallurgy Graduate Center, Av. Tecnologico No.1500 C.P.58120, Morelia, Mich., Mexico;

    Instituto Tecnologico de Morelia, Metallurgy Graduate Center, Av. Tecnologico No.1500 C.P.58120, Morelia, Mich., Mexico;

    Instituto Politecnico Nacional -ESIQIE, Department of Metallurgy and Materials Engineering, Apdo. Postal 75-874, Mexico City, Mexico;

    Graduate student, Instituto Tecnologico de Morelia, Metallurgy Graduate Center, Av. Tecnologico No.l500 C.P.58120, Morelia, Mich., Mexico;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    shell growth kinetic; curved slab mold; multiphase system; heat transfer; mathematical simulation;

    机译：壳生长动力学弯曲板坯模具多相系统传播热量;数学模拟;

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