Volume of fluid simulation of single argon bubble dynamics in liquid steel under RH vacuum conditions  

作　　者：Gu-jun Chen Sheng-ping He 

机构地区：[1]College of Materials Science and Engineering,Yangtze Normal University,Chongqing 400044,China [2]College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China

出　　处：《Journal of Iron and Steel Research International》2024年第4期828-837,共10页

基　　金：supported by the National Natural Science Foundation of China(Grant No.52104321);the Natural Science Foundation of Chongqing,China(Grant No.CSTB2023NSCQ-MSX0871);the Science and Technology Research Program of Chongqing Municipal Education Commission(Grant No.KJQN202101404).

摘　　要：Single argon bubble dynamics in liquid steel under Ruhrstahl-Heraeus(RH)vacuum conditions were simulated using the volume of fluid method,and the ideal gas law was used to consider bubble growth due to heat transfer and pressure drop.Additional simulation with a constant bubble density was also performed to validate the numerical method,and the predicted terminal bubble shape and velocity were found to agree with those presented in the Grace diagram and calculated by drag correlation,respectively.The simulation results under RH conditions indicate that the terminal bubble shape and velocity cannot be reached.The primary bubble growth occurs within a rising distance of 0.3 m owing to heating by the high-temperature liquid steel;subsequently,the bubble continues to grow under equilibrium with the hydrostatic pressure.When the initial diameter is 8-32 mm,the bubble diameter and rising velocity near the liquid surface are 80-200 mm and 0.5-0.8 m/s,respectively.The bubble rises rectilinearly with an axisymmetric shape,and the shape evolution history includes an initial sphere,(dimpled)ellipsoid,and spherical cap with satellite bubbles.

关 键 词：Bubble dynamics Liquid steel Volume of fluid Bubble growth Bubble shape Rising velocity 

分 类 号：TG142[一般工业技术—材料科学与工程]