9th International Conference on Modeling and Simulation of Metallurgical Processes in Steelmaking - STEELSIM2021

This contribution presents the large eddy simulation applied to the 2D model of the continuous casting process. The flow of molten steel in the continuous casting process is approximated by an incompressible fluid flow, which is described with transport equations for mass, momentum, spices, and energy, that are closed with fractional step method for pressure-velocity coupling, Boussinesq approximation for buoyancy, and Darcy approximation for the mushy zone. The turbulence is solved by applying the Smagorinsky large eddy simulation model and VanDriest damping function. The application of a large eddy simulation model enables us to model the eddies at higher accuracy than in the RANS type of models and with a much lower computational cost than in the DNS model. For the solution of governing equations, the meshless method based on the collocation with multiquadric radial basis functions is used locally on five-noded subdomains.
The meshless continuous casting simulation system has been previously successfully tested on several benchmark test cases. The results with the large eddy simulation implementation are compared to the other turbulence models such as the low-Re k-epsilon turbulence model. The time-averaged flow field of a large eddy simulation solution is in good agreement with the steady-state solution obtained by the previously implemented and tested RANS models.