Growth behavior of an equiaxed dendrite settling in an undercooled melt: three-dimensional phase-field lattice Boltzmann simulation study
Tuesday, June 20, 2023, 4:00 PM - 5:30 PM
Max Bell Foyer
Shinji Sakane
Equiaxed dendrites isolated in undercooled melts grow with motion owing to buoyancy and fluid force. It is crucial to understand the growth behavior of equiaxed dendrites because it significantly influences macrosegregation, which occurs during the solidification microstructure formation process. However, it is difficult to directly observe equiaxed dendrite growth with motion in molten alloys. In this study, a phase-field lattice Boltzmann simulation method for nonisothermal solidification of binary alloys with melt convection and solid motion was used to evaluate the growth behavior of an equiaxed dendrite settled in an undercooled melt. For the simulation, the adaptive mesh refinement method and multiple graphics processing unit (GPU) computing were implemented for computational efficiency. Using the developed method, the effects of latent heat and natural convection on the settling behavior of an equiaxed dendrite were comprehensively evaluated.