2018/12/10 by Xiaobo Jing, Qi Wang, Jing, Xiaobo +1
Earth and Planetary Sciences · Engineering · Materials Science · #Aluminum Alloy Microstructure Properties #FOS: Mathematics #Numerical Analysis (math.NA) #Solidification and crystal growth phenomena #nanoparticles nucleation surface interactions
paper · pdf · doi:10.48550/arxiv.1812.04504
openalex publication_date 2018/12/10 · openalex created_date 2018/12/22 · openalex updated_date 2026/08/01
We present a set of linear, second order, unconditionally energy stable schemes for the Allen-Cahn model with a nonlocal constraint for crystal growth that conserves the mass of each phase. Solvability conditions are established for the linear systems resulting from the linear schemes. Convergence rates are verified numerically. Dynamics obtained using the nonlocal Allen-Cahn model are compared with the one obtained using the classic Allen-Cahn model as well as the Cahn-Hilliard model, demonstrating slower dynamics than that of the Allen-Cahn model but faster dynamics than that of the Cahn-Hillard model. Thus, the nonlocal Allen-Cahn model can be an alternative to the Cahn-Hilliard model in simulating crystal growth. Two Benchmark examples are presented to illustrate the prediction made with the nonlocal Allen-Cahn model in comparison to those made with the Allen-Cahn model and the Cahn- Hillard model.