Scholarlink

<p>Gas–liquid circulation in Ruhrstahl–Heraeus (RH) vacuum refining plays a pivotal role in governing molten steel mixing, mass transfer, and decarburization efficiency. However, owing to the extreme operating conditions, including high temperature, low pressure, and the opacity of the melt, the underlying mechanisms of intense turbulent structures and bubble interfacial evolution inside the ladle remain insufficiently understood. To clarify the coupled interactions among turbulence, bubble transport, and decarburization in the RH process, this study employs large eddy simulation (LES) to resolve transient large-scale vortex structures, incorporates the interfacial area transport equation (IATE) to characterize interfacial area evolution, and develops an Euler–Euler–LES–IATE coupled model within the OpenFOAM-12 framework. On this basis, the effects of different drag closures on the RH flow field, interfacial evolution, and decarburization behavior are systematically investigated. The mathematical model was validated by comparing the predicted local velocity and carbon content evolution with the results from water-model experiments and industrial data, respectively. The results indicate that the drag model exerts a significant influence on the flow field, gas–liquid interfacial evolution, and decarburization behavior in RH refining. The TomiyamaCorrelated model predicts the highest average circulation flow rate (1157.07&#xa0;kg/s) and the lowest final carbon content (10.38&#xa0;ppm), indicating the most favorable overall decarburization performance. The Ishii–Zuber model shows the best agreement with the measured velocity data and exhibits stronger enhancement of local velocity and turbulent kinetic energy. The Schiller–Naumann model underestimates plume development, circulation intensity, and decarburization efficiency.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Evaluation of Drag Models in Eulerian–Eulerian–LES–IATE Simulation of Multiphase Flow and Decarburization in RH Vacuum Refining

  • 期刊论文

  • 发表日期：

    2026年7月24日

查看全文
  • Deqiang Li,
  • Fengsheng Qi,
  • Jin Gao,
  • Zhongqiu Liu,
  • Baokuan Li

摘要

Gas–liquid circulation in Ruhrstahl–Heraeus (RH) vacuum refining plays a pivotal role in governing molten steel mixing, mass transfer, and decarburization efficiency. However, owing to the extreme operating conditions, including high temperature, low pressure, and the opacity of the melt, the underlying mechanisms of intense turbulent structures and bubble interfacial evolution inside the ladle remain insufficiently understood. To clarify the coupled interactions among turbulence, bubble transport, and decarburization in the RH process, this study employs large eddy simulation (LES) to resolve transient large-scale vortex structures, incorporates the interfacial area transport equation (IATE) to characterize interfacial area evolution, and develops an Euler–Euler–LES–IATE coupled model within the OpenFOAM-12 framework. On this basis, the effects of different drag closures on the RH flow field, interfacial evolution, and decarburization behavior are systematically investigated. The mathematical model was validated by comparing the predicted local velocity and carbon content evolution with the results from water-model experiments and industrial data, respectively. The results indicate that the drag model exerts a significant influence on the flow field, gas–liquid interfacial evolution, and decarburization behavior in RH refining. The TomiyamaCorrelated model predicts the highest average circulation flow rate (1157.07 kg/s) and the lowest final carbon content (10.38 ppm), indicating the most favorable overall decarburization performance. The Ishii–Zuber model shows the best agreement with the measured velocity data and exhibits stronger enhancement of local velocity and turbulent kinetic energy. The Schiller–Naumann model underestimates plume development, circulation intensity, and decarburization efficiency.