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<p>A three-dimensional large Eddy simulation (LES) coupled with a magnetohydrodynamic (MHD) and solidification model was developed to investigate the transient fluid flow and solidification behavior in a slab continuous casting mold under nozzle clogging conditions. The accuracy of the mathematical model, specifically the magnetic flux density and flow field, was validated by measurements from a 1:5-scaled mercury physical model. The results indicate that nozzle clogging induces a severe asymmetric flow pattern and biased jet, leading to significant fluctuations and non-uniform growth of the solidified shell. The application of mold Electromagnetic Stirring (EMS) generates a horizontal recirculation flow that effectively suppresses the biased jet and improves the symmetry of the flow field. Quantitative analysis shows that EMS significantly enhances the temperature uniformity and reduces the deviation of solidified shell thickness caused by clogging. While the uniformity of the solidified shell improves with increasing stirring current up to 600 A, excessive stirring intensity (<i>e.g.</i>, 700 A) may slightly deteriorate uniformity due to strong turbulent fluctuations. Even under a severe clogging rate of 40 pct, EMS is proven to be effective in maintaining flow symmetry and shell uniformity compared to the case without EMS.</p>

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Study on Transient Asymmetric Flow and Solidification in Slab Continuous Casting with Nozzle Clogging Under Mold Electromagnetic Stirring

  • 期刊论文

  • 发表日期：

    2026年4月2日

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  • Haibiao Lu,
  • Fan Ye,
  • Xudong Yang,
  • Qiao Cheng,
  • Yunbo Zhong,
  • Zuosheng Lei

摘要

A three-dimensional large Eddy simulation (LES) coupled with a magnetohydrodynamic (MHD) and solidification model was developed to investigate the transient fluid flow and solidification behavior in a slab continuous casting mold under nozzle clogging conditions. The accuracy of the mathematical model, specifically the magnetic flux density and flow field, was validated by measurements from a 1:5-scaled mercury physical model. The results indicate that nozzle clogging induces a severe asymmetric flow pattern and biased jet, leading to significant fluctuations and non-uniform growth of the solidified shell. The application of mold Electromagnetic Stirring (EMS) generates a horizontal recirculation flow that effectively suppresses the biased jet and improves the symmetry of the flow field. Quantitative analysis shows that EMS significantly enhances the temperature uniformity and reduces the deviation of solidified shell thickness caused by clogging. While the uniformity of the solidified shell improves with increasing stirring current up to 600 A, excessive stirring intensity (e.g., 700 A) may slightly deteriorate uniformity due to strong turbulent fluctuations. Even under a severe clogging rate of 40 pct, EMS is proven to be effective in maintaining flow symmetry and shell uniformity compared to the case without EMS.