Simulation of Dendritic Crystal Growth of Pure Ni Using the Phase-field Model

The phase-field model is used in the numerical simulation of dendritic crystal growth in supercooled melt of pure Ni.The factors of anisotropy,degree of supercooling 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 obvious;As the degree of supercooling increases,stability of dendrite tip will be damaged,the dendrite tip branching-off will happen.Stirring power can promote side-branching,but does not affect growth state of dendritic crystal.