空气动力学学报2024，Vol.42Issue(6)：108-116,9.DOI:10.7638/kqdlxxb-2023.0176
疏水材料微尺度凹坑流滑移速度特性研究
Study on slip velocity characteristics of microscale concave flow over hydrophobic materials
摘要
Abstract
The concave configuration represents a prevalent and pivotal structural form within hydrophobic materials.Comprehending the slip velocity characteristics associated with concave surfaces carries profound implications for the design of these materials.This investigation employs the Discrete Unified Gas-Kinetic Scheme(DUGKS)to simulate the low-speed,two-dimensional concave flow within the Knudsen number range spanning from 0.01 to 0.5.The numerical simulation results reveal a noteworthy variation in slip velocity patterns in relation to the Knudsen number.As the concave size decreases(Kn＞0.3),the slip velocity within the concave region is lower than that on a smooth wall.Conversely,as the concave size increases(Kn＜0.2),the slip velocity exceeds that of a smooth wall.Additionally,there are discernible jumps in the statistically-averaged slip velocity at the cavity's boundaries,which become more pronounced with an increasing Knudsen number,suggesting that the Knudsen number should not exceed 0.3 when designing hydrophobic microstructures.关键词
疏水材料/微尺度/滑移速度特性/旋涡特性/离散统一气体动理论Key words
hydrophobic material/microscale/slip velocity characteristics/vortex characteristics/DUGKS分类
数理科学引用本文复制引用
张昭朋,叶正寅,叶坤..疏水材料微尺度凹坑流滑移速度特性研究[J].空气动力学学报,2024,42(6):108-116,9.基金项目
国家自然科学基金(12072281) （12072281）
