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不同壁面条件下液滴撞击铺展特性的模拟研究
引用本文:周鑫,马小晶,胡丽娜,刘佳,张博文.不同壁面条件下液滴撞击铺展特性的模拟研究[J].计算力学学报,2022,39(6):761-767.
作者姓名:周鑫  马小晶  胡丽娜  刘佳  张博文
作者单位:新疆大学 电气工程学院, 乌鲁木齐 830047;中国原子能科学研究院核工程设计研究所, 北京 102413
基金项目:国家自然科学基金(12002296;11762021);新疆维吾尔自治区自然科学基金(2022D01C47);新疆自治区重大科技专项(2022A01002-2)资助项目.
摘    要:液滴撞击不同润湿性壁面的传热流动问题在自然界和工业生产中广泛存在。研究采用CLSVOF方法,引入描述壁面润湿特性的动态接触角,并考虑液滴物性参数随温度的变化,建立液滴撞壁模型,模拟研究液滴撞击流动行为,通过与实验对比验证,确定模型有效性。在此基础上,对传热作用下考虑壁面润湿性的液滴撞击问题展开研究,探讨壁面传热作用对液滴撞击铺展特性的影响。研究表明,在撞击过程中,液滴先铺展后逐渐收缩,与静态接触角模型相比,采用动态接触角模型所得的液滴流动特性与实验结果更加吻合;随着接触角增大,液滴在撞壁初期不易铺展,随后则易于收缩;虽然固液传热作用会影响液滴铺展直径,但不改变液滴的运动趋势。

关 键 词:CLSVOF方法  液滴撞击  动态接触角  壁面温度
收稿时间:2021/6/21 0:00:00
修稿时间:2021/8/1 0:00:00

Simulation study on spreading characteristics of droplet impinging under different wall conditions
ZHOU Xin,MA Xiao-jing,HU Li-n,LIU Ji,ZHANG Bo-wen.Simulation study on spreading characteristics of droplet impinging under different wall conditions[J].Chinese Journal of Computational Mechanics,2022,39(6):761-767.
Authors:ZHOU Xin  MA Xiao-jing  HU Li-n  LIU Ji  ZHANG Bo-wen
Institution:School of Electrical Engineering, Xinjiang University, Urumqi 830047, China;Institute of Nuclear Engineering Design, China Institute of Atomic Energy, Beijing 102413, China
Abstract:The heat transfer and flow problems of droplet impinging walls of different wettability widely exist in nature and industrial production.The research adopts the CLSVOF method with dynamic contact angle,and considers the change of droplet physical parameters with temperature.The model of droplet impinging on the wall is established to simulate the process of droplet impinging and flowing,and the validity of the model is verified by comparing with the experimental results.On this basis,the study on the impinging of droplet considering the wettability of the wall under the effect of heat transfer is also carried out,and the effect of heat transfer on spreading characteristics of droplet is investigated.The research shows that during the impinging process,the droplet spreads first and then gradually shrinks.Compared with the results of the static contact angle model,the spreading characteristics of droplet obtained by the dynamic contact angle model are more consistent with the experimental results.As the contact angle increases,it is difficult for the droplet to spread at the beginning of impinging and then easily shrink.Although the heat transfer affects the droplet spreading diameter,it does not change the spreading trend of droplet.
Keywords:CLSVOF method  droplet impinging  dynamic contact angle  wall temperature
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