Multiphase Flow and Bubble Size Distribution in Continuous Casters Using a Hybrid EEDPM Model

摘要：

　　In the continuous casting process,argon gas injection can help to avoid nozzle clogging and to remove impurities,but it causes complexity associated with turbulent multiphase flow.In particular,the actual bubble size distribution in the mold remains unclear,even though it has a great influence on the flow pattern and the generation of defects.In this study,a new computational model has been developed in order to simulate the fluid flow and bubble size distribution in continuous casting.This hybrid model of multiphase flow and bubble size distribution combines together simultaneously,a Eulerian Eulerian model(EE)coupled with a Discrete Phase Model(DPM),called EEDPM.Large gas pockets are simulated directly by the Eulerian Eulerian model,and smaller bubbles are tracked by the Discrete Phase Model.Another model is implemented to predict the shearing-off process to calculate the number,sizes and frequency of bubbles that detach from the large gas pockets,and are then injected as Discrete Phase Model bubbles.The local,time-varying bubble sizes from the DPM are input to the EE model for a local momentum-exchange interaction.This hybrid model is validated by comparison with measurements in a lab-scale experiment1.

关键词： multiphase flow bubble size distribution eulerian model discrete phase model shearing off

作者: YANG Hyunjin THOMAS Brian G.

作者单位: Department of Mechanical Science and Engineering,University of Illinois at Urbana-Champaign,1206 W.G Department of Mechanical Engineering,Colorado School of Mines,Brown Hall W370-B,1610 Illinois Street

会议类型: 国际会议

会议名称: STEELSIM2017(第七届冶金过程及钢铁材料模拟及仿真国际会议)

会议地点: 青岛

会议语种:英文

页码: 173-177

在线出版日期: 2017-08-16（万方平台首次上网日期，不代表论文的发表时间）