Numerical Simulation on Non-isothermal Dendritic Growth of Undercooled Melt Using Phase-field Method

A phase-field model coupling with solute field and temperature field was established based on the binary phase-field model.The control equation was numerically solved with finite difference method.The dendritic growth in Al-Cu binary alloy non-isothermal solidification was simulated.And the effect of undercooling on the dendritic growth was studied.The results indicate that the larger undercooling,the rapider growth of dendrite and the larger temperature difference,the more lateral dendrite increasingly developed,even three times dendrite appear.