5th International Conference on Advances in Solidification Processes (ICASP-5) 5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining (CSSCR-5)

Since last century, two and three-phase models are generally adopted for the meso-scale simulations of the growth of equiaxed grains in solidification of binary and ternary alloys [1]-[3]. Yet, as far as three-phase models are concerned, their implementation in the macro-scale model with the equiaxed grains transport can be realised in different ways. Indeed, since the solid fraction of a grain and its envelope are attached and transported together, they share the same velocity field. Furthermore, different implementation of the multiphase meso-scale models into macro-scale models implies different treatment of the fluid flow and the macroscale segregation. In the present work advantages and problems adherent to different models are discussed and some results obtained for macrosegregation are compared. Acknowledgements This work is a joint cooperation between SIMAP laboratory of Grenoble INP (France) and Key Laboratory of EPM of Northeastern University (P. R. China). The authors gratefully acknowledge financial support from China Scholarship Council (no. 201706080074), the Program of Introducing Talents of Discipline to Universities (The 111 Project of China, Grant No. B07015) and ESA-MAP project MICAST (contract number ESA-AO-99-031). References 1 M. Rappaz and Ph. Thevoz, Acta metall., 35 (1987), 1487-1497 2 C.Y.Wang and C.Beckermann, Mat. Sci. Engineering, A171 (1993), 199-211 3 M.Rappaz and W.J.Boettinger, Acta mater., 47 (1999), 3205-3219