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 castings.
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
This paper aims to point out the critical problems in numerical verification of solidification simulation codes and the complexity of the verification and to propose and apply a procedure of generalized verification for macrosegregation simulation.
COBISS.SI-ID: 888059
The application of the mesh-free local radial basis function collocation method in solution of incompressible turbulent flow is explored in this paper. The advantages of the represented mesh-free approach are its simplicity, accuracy, similar coding in 2D and 3D, and straightforward applicability in non-uniform node arrangements.
COBISS.SI-ID: 1147899
A recently developed local radial basis function collocation method is used for the solution of the transient convective - diffusive heat transport in continuous casting of steel. The solution of the thermal field with moving boundaries due to phase-change and the growing computational domain is based on the mixture continuum formulation. The growth of the domain and the movement of the starting block are described by activation of additional nodes and by the movement of the boundary nodes through the computational domain, respectively.
COBISS.SI-ID: 1165819