【摘要】 在分析表面微观特征对液滴润湿状态的影响时,尺度效应是无法绕过的前提条件和分析基础。本文以矩形微结构表面液滴为研究对象,通过数值模拟,得到了给定微结构表面液滴在不同液滴半径与矩形微结构宽度比例下的润湿状态。此外,本文还模拟得到了液滴完全浸润矩形微结构的临界接触角及其相对于微结构尺寸的变化规律。结果表明,液滴半径与微结构宽度比越小,液滴下气液界面开始浸润微结构时的临界接触角越大,无重力条件下表面液滴下气液界面的稳定性越差。若重力不可忽略,则液滴半径与微结构宽度比越大,重力的影响越大,表面液滴下气液界面的稳定性越差。更多还原

【Abstract】 Scale effect can not be ignored when we discuss the influences on droplet wetting state by microscopic characteristics.The droplets on the microstructure surface were simulated and wetting state change law of the different ratio of the droplet radius and the microstructure width was studied in this article.The change trends of the critical contact angle with microstructure width was also researched in this article.The results indicate that the less the ratio of the droplet radius and the microstructure width,the larger the critical contact angle and the less stable of the meniscus.When the gravity can not be ignored,the larger the ratio of the droplet radius and the microstructure width,the more the gravity influence and the less stable of the meniscus.更多还原