EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

The formation process of equiaxed structure is a very complicated phenomenon including the dendrite growth, advection and diffusion of heat and solute, liquid flow, solid motion, and so on. We have developed the multi-phase-field lattice Boltzmann (MPF-LB) model to express the formation process of equiaxed structure [S. Sakane et al., Comp. Mater. Sci. 178 (2020) 109639, T. Takaki et al., Comp. Mater. Sci. 147 (2018) 124–131], where the dendrite growth and grain growth after completion of solidification are computed by the MPF method, the liquid flow is computed by the LB method, and the motion of the multiple solids is expressed by solving the equations of motion. In this talk, we introduce the large-scale 2D simulations of the formation process of equiaxed structure. Also, the MPF-LB model was successfully applied to the semi-solid deformation [N. Yamanaka et al., IOP Conf. Ser. Mater. Sci. Eng., 861 (2020) 012067, N. Yamanaka et al. (2021) submitting]. The large-scale 2D semi-solid simulations are also introduces in this talk. The large-scale simulations are performed using the multiple Graphics Processing Unit in a supercomputer [Y. Shibuta, M. Ohno, T. Takaki, Adv. Theory Simul., 1 (2018) 180006].