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On the Importance of Modeling 3D Shrinkage Cavities for the Prediction of Macrosegregation in Steel Ingots

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CFD Modeling and Simulation in Materials Processing 2016

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

With this work an existing 3-phase mixed columnar-equiaxed solidification model is extend to treat the formation of shrinkage cavity by including an additional phase. In the previous model a mixed columnar and equiaxed solidification approach that considers the multiphase transport phenomena (mass, momentum, species and enthalpy) is proposed to calculate the as-cast structure including columnar-to-equiaxed transition (CET) and formation of macrosegregation. In order to incorporate the formation of shrinkage cavity, a supplementary phase, i.e. gas phase or covering liquid slag phase, is considered in addition to the previously introduced 3 phases (parent melt, solidifying columnar dendrite trunks and equiaxed grains). No mass and species transfer between the new phase and the other 3 phases is necessary, but momentum and energy transfer is of critical importance for the formation of the shrinkage cavity and with that the flow and formation of macrosegregation would be influenced. Some modelling approaches for the momentum and energy transfer are suggested and tested.

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Author information

Authors and Affiliations

  1. Montanuniversitaet Leoben, Austria

    A. Ludwig (Chair of Simulation and Modelling of Metallurgical Processes), M. Wu (Chair of Simulation and Modelling of Metallurgical Processes) & A. Kharicha (Chair of Simulation and Modelling of Metallurgical Processes)

  2. Christian Doppler Laboratory for Advanced Process Simulation of Solidification and Melting, Montanuniversitaet Leoben, Austria

    M. Wu (Chair of Simulation and Modelling of Metallurgical Processes) & A. Kharicha (Chair of Simulation and Modelling of Metallurgical Processes)

Authors
  1. A. Ludwig
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  2. M. Wu
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  3. A. Kharicha
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Editor information

Editors and Affiliations

  1. Metallurgical and Materials Engineering Department, The University of Alabama, Tuscaloosa, Alabama, USA

    Laurentiu Nastac (Associate Professor of Metallurgical and Materials Engineering, Key FEF Professor and the Director of the Solidification Laboratory and the UA-COE foundry) (Associate Professor of Metallurgical and Materials Engineering, Key FEF Professor and the Director of the Solidification Laboratory and the UA-COE foundry)

  2. University of Science and Technology Beijing, China

    Lifeng Zhang (Professor and the Dean of the School of Metallurgical and Ecological Engineering, Distinguished Professor) (Professor and the Dean of the School of Metallurgical and Ecological Engineering, Distinguished Professor)

  3. Yangtze River Scholars, China

    Lifeng Zhang (Professor and the Dean of the School of Metallurgical and Ecological Engineering, Distinguished Professor) (Professor and the Dean of the School of Metallurgical and Ecological Engineering, Distinguished Professor)

  4. University of Illinois, USA

    Brian G. Thomas (Gauthier Professor of Mechanical Engineering, Director of the Continuous Casting Consortium) (Gauthier Professor of Mechanical Engineering, Director of the Continuous Casting Consortium)

  5. Northeastern University (NEU), Shenyang, China

    Miaoyong Zhu (Professor and Dean of Metallurgy School (MS) (Professor and Dean of Metallurgy School (MS)

  6. Metallurgy Department, Montanuniversitaet Leoben, Austria

    Andreas Ludwig (Full Professor) (Full Professor)

  7. Materials Science and Technology Division, Oak Ridge National Laboratory, USA

    Adrian S. Sabau (Senior Research Staff Member) (Senior Research Staff Member)

  8. University of Greenwich, London, UK

    Koulis Pericleous (Chair of Computational Fluid Dynamics, Director of the Centre for Numerical Modelling and Process Analysis) (Chair of Computational Fluid Dynamics, Director of the Centre for Numerical Modelling and Process Analysis)

  9. Ecole des Mines de Nancy (Lorraine University), France

    Hervé Combeau (professor) (professor)

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© 2016 The Minerals, Metals & Materials Society

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Ludwig, A., Wu, M., Kharicha, A. (2016). On the Importance of Modeling 3D Shrinkage Cavities for the Prediction of Macrosegregation in Steel Ingots. In: Nastac, L., et al. CFD Modeling and Simulation in Materials Processing 2016. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-65133-0_1

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