基于AR-DCA模型的液滴撞击壁面行为研究  

Research on behavior of droplet impact on wall based on AR-DCA model

作　　者：李源慧 王志敏 侯乐乐 杨溢 李聪[1] 姚一娜 LI Yuanhui;WANG Zhimin;HOU Lele;YANG Yi;LI Cong;YAO Yi’na(School of Emergency Management and Safety Engineering,China University of Mining&Technology(Beijing),Beijing 100083,China;Hongde College,Beijing University of Chemical Technology,Beijing 100029,China;School of National Security,People’s Public Security University of China,Beijing 100038,China)

机构地区：[1]中国矿业大学(北京)应急管理与安全工程学院,北京100083 [2]北京化工大学宏德书院,北京100029 [3]中国人民公安大学国家安全学院,北京100038

出　　处：《中国安全生产科学技术》2025年第2期15-22,共8页Journal of Safety Science and Technology

基　　金：国家重点研发计划项目(2022YFC3090500);国家自然科学基金项目(52306199,52304274);基本科研业务费专项资金项目(2023ZKPYAQ06)。

摘　　要：为了探究液滴撞击不同润湿壁面的动态行为特征,采用VOF方法,通过UDF加入前进-后退动态接触角模型(AR-DCA),建立模拟液滴撞击不同润湿性壁面(θ_(eq)=25°,θ_(eq)=99°,θ_(eq)=112°)的数值模型,模拟液滴在不同的We数(26,76,102)下撞击壁面的行为变化过程。研究结果表明:液滴撞击不同的润湿壁面后的动态行为有着显著差异,随着壁面润湿性变差,液滴达到的最大铺展直径变小,还会出现卷吸气泡的现象;随We数的增大,液滴最大铺展直径变大,回缩时间变长,最终稳定在亲水壁面上的接触直径并无明显差异,而在疏水壁面上,液滴在反弹过程中会更快地出现二次液滴。研究结果可为喷雾冷却、细水雾灭火等领域的液滴行为优化提供理论支持。To investigate the dynamic behavior characteristics of droplets impacting on the walls with different wettability,a numerical model was established using the VOF method,incorporating an advancing-receding dynamic contact angle(AR-DCA)model through User-Defined Function(UDF),so as to simulate the droplets impacting on the walls with different wettability(θ_(eq)=25°,θ_(eq)=99°,θ_(eq)=112°).The behavior variation process of droplets impacting on the wall under different We numbers(26,76,102)was simulated.The results show that the dynamic behavior of droplets after impacting on the walls with different wettability has significant difference.As the wettability of wall becomes worse,the maximum spreading diameter of the droplet becomes smaller,and the phenomenon of entrainment bubbles will occur.With the increase of We number,the maximum spreading diameter of the droplet becomes larger,the retraction time becomes longer,and there is no significant difference in the contact diameter that is finally stabilized on the hydrophilic wall.Whereas on the hydrophobic wall,the droplets will appear secondary droplets more quickly during the rebound process.The research results can provide theoretical support for the optimization of droplet behavior in the fields of spray cooling and water mist fire extinguishing.

关 键 词：润湿性 动态接触角 VOF 数值模拟 

分 类 号：X932[环境科学与工程—安全科学]