NUMERICAL-ANALYSIS OF MOLTEN STEEL FLOW IN A CONTINUOUS-CASTING MOLD BY USE OF LARGE EDDY SIMULATION

The authors developed a numerical simulator which can conduct transient calculations of molten steel turbulence in a continuous casting mold based on large eddy simulation model and compared the calculated values of fluid velocity with the measured ones in water and mercury models. With respect to time-averaged velocities in the upper region of mold, a qauntatively good agreement between the calculation and the measurement in a water model was obtained. The calculated turbulence energy spectrum near meniscus agreed qualitatively with the measured one in a mercury model. The turbulence fluctuation with higher frequency is generated due to the velocity fluctuation at taps of immersion nozzle which is caused by fluid instability at the inner bottom of nozzle.