A numerical model is developed for the simulation of solidification grain structure formation (equiaxed to columnar and columnar to equiaxed transitions) during the continuous casting process of steel billets. The cellular automata microstructure model is combined with the macroscopic heat transfer model. The cellular automata method is based on the Nastac’s definition of neighborhood, Gaussian nucleation rule, and KGT growth model. The microscopic model parameters have been adjusted with the experimental data for steel 51CrMoV4. Simulations have been carried out for different casting.
COBISS.SI-ID: 1080315
This paper explores the application of the mesh-free Local Radial Basis Function Collocation Method (LRBFCM) in solution of coupled heat transfer and fluid flow problems in Darcy porous media. The involved temperature, velocity and pressure fields are represented on overlapping sub-domains through collocation by using multiquadrics Radial Basis Functions (RBF). The energy and momentum equations are solved through explicit time stepping. The solution procedure is represented for a steady natural convection problem in a rectangular cavity.
COBISS.SI-ID: 893179