中文摘要：

采用国内外描述相变微观结构的相场模型，将果汁体系视为水和溶质组成的二元系统，探究各向异性系数取值对冰晶相貌及溶质分布模拟的的影响．结果表明：随着各向异性系数的增大，冰晶的二次分枝越来越发达，其尖端生长速度变快，且尖端速度波动的幅值增大；冰晶生长速度越快，则凝固时间越短，溶质扩散层越薄．各向异性系数在0．025左右取值，较能反映冰晶实际生长形貌．

英文摘要：

The phase-field model which coupled the concentration field and phase field is applied to simulate microstructure evolution during crystal growth of juice binary in 2-D, exploring the process of fruit juice crystallization. The influence of anisotropy degree on dendritic crystal growth is investigated in this paper. The simulated result shows that as the degree of anisotropy increases, on one hand the growth velocity of dendrite tip is accelerated and Its cutting-edge growth faster characteristic of dendritic structure is more obvious. ; on the other hand the dendrite growth speed faster, the coagulation time is shorter, and the solute diffusion layer is thinner. When the anisotropy parameter is around 0. 025, the best simulation result of the dendrite morphology can be obtain.