Solidification is an incredibly complex process. At the macroscale, it involves both a liquid phase that may be flowing and a solid phase that may be deforming. At the microscale, it involves pattern selection processes, diffusional effects, grain nucle-ation, and attachment kinetics. There is also heat and mass transfer to consider at all the length scales of interest. Thus, the process of solidification involves strong coupling between these microscopic and macroscopic views.
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