杨 燕¹，李 娜²，袁训锋^2*

（1.商洛学院数学与计算机应用学院，陕西商洛 726000；

2.商洛学院商洛市人工智能研究中心，陕西商洛 726000）

摘要：在速冻保鲜过程中，界面各向异性显著影响冰晶生长行为。采用相场模型再现细胞溶液中水分凝结形成冰晶的过程，从界面能和界面动力学两个方面探讨各向异性对冰晶生长行为的影响规律。结果表明：仅有界面能各向异性作用时晶粒中心沿着［100］向外延伸形成五重对称冰晶主枝，仅有界面动力学各向异性作用时晶粒中心沿着［100］向外延伸形成五重对称冰晶主枝，界面动力学对冰晶形态的影响比界面能更显著。界面能与界面动力学各向异性共存时模拟结果与冰晶实际形貌一致，晶粒中心存在紧实的固相区且边缘向外延伸出冰晶主枝，主枝上出现侧向分支，侧向分支彼此竞争生长；随着冷冻时间推移，晶粒形貌由冰球体经五边形冰盘向五重对称树枝状冰晶转变。

关键词：相场模型；冰晶生长；界面动力学各向异性；界面能各向异性；五重对称

中图分类号：TS205.7   文献标识码：A   文章编号：1674-506X（2021）04-0086-0005

Effect of Interfacial Anisotropy on Ice Crystal Growth Behavior During Quick-frozen Preservation Process

YANG Yan¹, LI Na², YUAN Xun-feng^2*

（1.College of Mathematics and Computer Application, Shangluo University, Shangluo Shaanxi 726000, China;

2.Research Center of Artificial Intelligence of Shangluo, Shangluo University, Shangluo Shaanxi 726000, China）

Abstract：Interfacial anisotropy significantly affects the growth behavior of ice crystals in the process of quick-freezing. The phase-field model was used to reconstruct the process of water condensation forming ice crystals in cell solution, and the influence of anisotropy on ice crystal growth behavior was studied from two aspects of interface energy and interface dynamics. The results show that the grain center extends outward along [100] to form a five-fold symmetrical main branch under the action of only interfacial anisotropy, and the grain center extends outward along [100] to form a five-fold symmetrical main branch under the action of only interfacial dynamic anisotropy. The influence of interfacial dynamics on the ice crystal morphology is more significant than that of interfacial energy. When the interfacial energy and interfacial dynamic anisotropy coexist, the simulated results are consistent with the actual morphology of ice crystals. There is a compact solid region in the center of the grain, and the edge extends outward to the ice crystal main branch. There are side branches on the main branch, and the side branches grow in competition with each other. With the as increase of freezing time, the crystal morphology changes from a puck-shaped ice disk to a five-fold symmetrical dendritic ice crystal.

Keywords：phase-field model; ice crystal growth; interfacial kinetic anisotropy; interfacial energy anisotropy; five-fold symmetric

doi：10.3969/j.issn.1674-506X.2021.04-012

收稿日期：2021-01-31

基金项目：商洛市科技局创新团队资助项目（SK2017-46）；商洛学院“智能控制与检测技术”科技创新团队资助项目（18SCX004）；陕西省大学生创新创业训练计划项目（S201911396009）

作者简介：杨燕（1986-），女，讲师。研究方向：果蔬速冻保鲜研究。

*通信作者

引文格式：杨燕,李娜,袁训锋.界面各向异性对速冻保鲜过程中冰晶生长行为的影响[J].食品与发酵科技,2021,57(4):86-90.