Large Eddy Simulation of Two-phase Flow and Solidification in a Jumbo Round Bloom with Electromagnetic Stirring
A large eddy simulation(LES)model for a two-phase flow considering solidification is developed to simulate the transient thermal-magnetic-flow coupled fields inside a jumbo round bloom.Magnetic field is calculated based on Maxwells equations,constitutive equation,and Ohm law.An enthalpy-porosity technique is used to model solidification of steel.The movement of free surface is described by volume of fluid(VOF)approach.Results show that Lorentz force is rotated periodically in half TB,driving steel to a transient tangential flow field inside the bloom strand.The whole field is obvious asymmetry and instantaneous with multi-scale vortices aggregate in the injection zone and near the solidified shell.High frequency will help produce more large vortices,and significantly intensify meniscus fluctuation.So the frequency requires serious concern,and the most probable frequency is suggested 0.5Hz to 1.5Hz.The meniscuses of different frequencies meet at a point that located near the 1/2 radius of the round bloom.It is found novelly that the molten steel injected from submerged entry nozzle(SEN)swings at a period,indicating that biased flow can also be found in a straight nozzle.
jumbo round bloom straight nozzle bias flow large eddy simulation solidification
LI Xianglong LI Baokuan LIU Zhongqiu NIU Ran
School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China
国际会议
STEELSIM2017(第七届冶金过程及钢铁材料模拟及仿真国际会议)
青岛
英文
291-294
2017-08-16（万方平台首次上网日期，不代表论文的发表时间）