Large Eddy Simulation of Electromagnetic Three‐Phase Flow in a Round Bloom Considering Solidified Shell

Abstract

A large eddy simulation (LES) model has been developed to simulate three‐phase flow, heat transfer, and solidification processes under the effect of M‐EMS. Through comparing the magnetic flux density, surface temperature, and growth of solidified shell with experimental results, the reliability of our mathematical model is proved. Results show that the ignorance of solidified shell will overestimate the velocity field and slag‐metal interface fluctuation, therefore the solidified shell should not be ignored. What's more, a distinct flow, which is characterized by a rotary flow from top view, and biased flow from front view, is identified through this model. An upward flow is formed due to this distinct flow, which can explain the imbalance morphology of slag‐metal interface, and the typical tornado‐like shape slag‐metal interface is vividly observed using this model; By contrast, without M‐EMS, the distinct flow can also be found near the injection end, but it makes little effect on the fluctuation of slag‐metal interface. In addition, a new indicator of ΔH is defined to investigate the slag‐metal interface fluctuation, and the deformation of slag layer is also predicted. The mathematical model is helpful for understanding the deformation of slag‐metal interface during bloom casting.