六角冰晶生长过程的相场模拟  

Phase field simulation of the hexagonal ice crystal growth process

作　　者：韩端锋[1] 王永魁 鞠磊 王庆[1] 王春阳 HAN Duanfeng;WANG Yongkui;JU Lei;WANG Qing;WANG Chunyang(College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学船舶工程学院

出　　处：《哈尔滨工程大学学报》2019年第9期1537-1542,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51809061,51639004);国家重点研发计划项目(2018YFC1406000,2016YFE0202700);黑龙江省科学基金项目(LC2018021);中央高校基本科研业务费专项资金项目(HEUCFM180111)

摘　　要：为了研究空气中过冷水滴附着船舶上层建筑后结冰过程的微观机理,本文进行了冰晶生长数值模拟研究。基于相场法中经典的Kobayashi模型,采用有限差分法九点差分格式离散偏微分方程,借助Python语言编程工具实现了冰晶生长的模拟及可视化。通过主要参数的敏感性分析,发现界面宽度均值、融化温度等参数对冰晶生长及最终形貌存在不同程度的影响,枝晶生长模拟过程与显微镜实验观察结果相一致,并与自然界真实存在的雪花轮廓相似,验证了本文数值方法的可靠性,对冰晶生长过程的数值模拟,进一步揭示过冷水滴附着结冰过程的微观机理。In order to study the microscopic mechanism of ice formation after airborne supercooled water droplets adhere to ship superstructure,numerical simulation of ice crystal growth was carried out in this paper.Based on the classical Kobayashi model in the phase domain method,this paper used the nine-point difference scheme in the finite difference method to discretize the partial differential equation,and realized the simulation and visualization of ice crystal growth with the aid of the Python programming tool.Furthermore,through sensitivity analysis of the main parameters,it was found that some parameters,such as the mean of the interface width and melting temperature,has different influences on ice crystal growth and final morphology.The simulation process of dendrite growth in this paper was consistent with the results of a microscopic experiment,and was similar to the true snowflake profile in nature.This verified the reliability of the numerical method used.Numerical simulation of the ice crystal growth process used in this study will further reveal the micro-mechanism of the ice deposition process by supercooled water droplets.

关 键 词：上层建筑 结冰 液滴 冰晶 相场法 有限差分法 数值模拟 参数影响 

分 类 号：O781[理学—晶体学]