Phase-field Method Simulation of the Crystal Growth with Strongly Surface Tension Anisotropy
The crystal growth morphology and behavior in strongly surface-tension anisotropy circumstance is investigated numerically using the phase-field method in two dimensions.In order to describe the strongly surface tension anisotropy in solid-liquid interface,the anisotropy function is regularized with Eggleston et al.proposed formula.In the equilibrium crystal shape simulation the phenomena of orientation missing have been quantitatively reproduced.During the free dendrite growth procedure,as the anisotropy below the critical value,the growth velocity increases with the anisotropy.When the anisotropy is across the critical value,the growth velocity dropped down about 5 percent.While the anisotropy higher than the critical value,the growth rate increases again with the anisotropy until reaches the maximum at 0.20,and then keep unchanged.