摘要
实验表明溶解在水中的气体会在疏水表面吸附和集聚,学界普遍认为其有"纳米气泡"和"微气饼"两种存在形式。对于这两种形式,经典理论无法解释其稳定存在。本文采用分子动力学方法对气体吸附和积聚过程进行模拟,结果显示吸附气体表层覆盖着气液混合层,对该混合层的形状和特性进行分析和研究,发现该气液混合层具有较高的粘度并且对气体的扩散有明显的抑制作用。
Experimental results show that gas dissolved in water can be adsorbed and accumulated on hydrophobic surface. There are two formations of adsorbed gas, nanobubbles and micro pancakes. Classical theory can’t explain their stable existence. In this paper, molecular dynamics simulation was used to study the adsorption and agglomeration of gas. It is found that there exist a gas-liquid mixed layer coated on the adsorbed gas. The shape and characteristics of the mixed layer were studied and analyzed. It was found that the viscosity of gas-liquid mixture was greater than that of water and it inhibits gas diffusion.
作者
骆庆群
李建素
LUO Qingqun;LI Jiansu(School of Mechanical Engineering,North University of China,Taiyuan,Shanxi 030051,China)
出处
《计算物理》
CSCD
北大核心
2021年第4期465-469,共5页
Chinese Journal of Computational Physics
基金
国家自然科学基金(61874100)资助项目。
关键词
气体吸附
气液混合层
疏水界面
gas adsorption
gas-liquid mixing layer
hydrophobic interface
