摘要
研究表面微观结构对液滴动态润湿性能的影响,具有重要的科学意义和工程应用价值。多体耗散粒子动力学(MDPD)方法是一种介观尺度的模拟方法,可以实现不同微结构表面与流体间的相互作用。通过与实验和模拟结果进行对比的方法验证了液滴浸润固体壁面模型的准确性和可行性,系统研究了微结构参数对表面浸润性能的影响。结果表明:微柱高度对液滴浸润状态的影响并不是一直存在,微柱高度为1时,固壁表面均表现为亲水;微柱高度为2时,随着面积分数的增大,固壁表面由疏水变为亲水;微柱高度超过阈值2时,固液作用基本不会改变。
The influence of surface microstructure on the dynamic wettability of droplets has important scientific significance and engineering application value.Many-body dissipative particle dynamics(MDPD)method is a mesoscale simulation method that can realize the interaction between fluid and surface with different microstructures.The accuracy and feasibility of the model are verified by comparing with the experimental and simulation results,and the influence of microstructure parameters on the surface wetting performance is systematically studied.The results show that the influence of microcolumn height on droplet wetting state does not always exist.When the microcolumn height is 1,the solid wall surface is hydrophilic.When the microcolumn height is 2,the surface of the solid wall changes from hydrophobic to hydrophilic with the increase of area fraction.When the microcolumn height exceeds the threshold of 2,the solid-liquid interaction does not change.
作者
孟欣
刘汉涛
李海桥
Meng Xin;Liu Hantao;Li Haiqiao(School of Energy and Power Engineering,North University of China, Shanxi Taiyuan,030051,China)
出处
《机械设计与制造工程》
2022年第2期90-94,共5页
Machine Design and Manufacturing Engineering
基金
国家自然科学基金资助项目(51976203)
中北大学研究生科技立项(20201774)。
