Simulation of Dendritic Crystal Growth of Pure Ni Using the Phasefield Model
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Key Words：Phasefield model； Dendrite growth； Numerical simulation； Supercooled melt
Abstract：The phasefield model is used in the numerical simulation of dendritic crystal
growth in supercooled melt of pure Ni. The factors of anisotropy, degree of supe
rcooling and thermal noise is investigated in this paper. The simulated
result shows that as the degree of anisotropy increases, the growth velocity of
dendrite tip is accelerated and characteristic of dendritic structure is more ob
vious; As the degree of supercooling increases, stability of dendrite tip will b
e damaged, the dendrite tip branchingoff will happen. Stirring power can promo
te sidebranching, but does not affect growth state of dendritic crystal.
