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：为了研究速冻保鲜过程中冰晶形成的微观机理，降低冰晶形态对细胞组织结构的破坏程度，以细胞溶液为研究对象，采用五重对称弱各向异性条件相场模型，再现过冷溶体中的冰晶形态演化过程，分析了不同各向异性条件下的冰晶形态演化规律。结果表明：界面动力学各向异性或界面能各向异性单独存在时，优先生长方向［100］和［100］快速发展成冰晶主枝，主枝根部受溶质和热量富集影响形成“缩颈”，冰晶整体为五角星状。在界面能各向异性ε_c为0.02时，随着界面动力学各向异性强度的增加，界面能和界面动力学各向异性交互作用，优先生长方向由［100］逐渐向［100］转变，冰晶整体为薄圆冰盘状。

关键词：相场模型；冰晶生长形态；界面能各向异性；界面动力学各向异性；五重对称

中图分类号：TS205.7   文献标识码：A   文章编号：1674-506X（2020）05-0055-0005

Study on Morphology of Ice Crystal Growth During Quick-frozening 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：In order to understand the microcosmic mechanism of ice crystal formation during quick-freezing preservation and reduce the damage degree of ice crystal morphology to cell structure. Take cell solution as the research object, the growth process of ice crystals in the supercooled solution was reproduced and the effects of anisotropy on the growth of ice crystals in a supercooled solution were investigated by using a five-fold symmetric phase-field model. The results show that when only the interfacial energy or kinetic anisotropy exists, the preferred growth direction ［100］ and ［100］ rapidly develops into the main branch of ice crystals, and the root of the main branch is influenced by solute and heat enrichment and forms“necking", and the whole ice crystal is a pentagram. When the value of interface energy anisotropy is 0.02, with the increase of the interface kinetic anisotropy strength, the interaction between the interface energy and the interface kinetic anisotropy, the preferred growth direction changes gradually from ［100］ direction to［100］, and the whole ice crystal is a thin round ice disk.

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

doi：10.3969/j.issn.1674-506X.2020.05-009

收稿日期：2020-07-14

基金项目：商洛学院“智能控制与检测技术”科技创新团队资助项目（18SCX004）；陕西省教育厅专项科研计划项目（18JK0249）；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。主要从事果蔬速冻保鲜研究。

*通讯作者

引文格式：杨燕,李娜,袁训锋.速冻保鲜过程中冰晶生长形态研究[J].食品与发酵科技,2020,56(5):55-59.