To establish a simplified method to simulate the turbulence and solidified shell in the mold, the so-called laminar equivalent model (LEM) is used, based on the distribution of the turbulent viscosity in the liquid core. This paper also describes the setting of boundary conditions, and the method of connecting the computational domains of fluid flow and heat transfer. The current method is validated by simulating the real CC process. It is shown that the method cannot only get the results with the same accuracy as the K-ε turbulent model, but also results which agree with the data obtained from measurements of breakout shells in production. Furthermore, the computational cost is reduced to about 25% of that required by the K-ε turbulent model.
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