体相纳米气泡的稳定性研究  

A study of the stability of bulk nanobubbles

作　　者：何金丽 冯琦 厉嘉贤 周晓艳[1] 陆杭军[1] HE Jinli;FENG Qi;LI Jiaxian;ZHOU Xiaoyan;LU Hangjun(Institute of Condensed Matter Physics,Zhejiang Normal University,Jinhua 321004,China)

机构地区：[1]浙江师范大学凝聚态物理研究所,浙江金华321004

出　　处：《浙江师范大学学报（自然科学版）》2021年第4期389-394,共6页Journal of Zhejiang Normal University:Natural Sciences

基　　金：国家自然科学基金资助项目(11875237)。

摘　　要：为了研究体相纳米气泡的稳定性,利用分子动力学模拟研究了水溶液中纳米气泡的形成条件及寿命.结果发现:纳米气泡内部的密度远大于宏观气泡内的气体密度;而且,通过分析离开纳米气泡界面的气体分子流,估算了开放体系的纳米气泡的寿命,它随着气泡尺度的增加而增加.该研究结果有助于从微观上理解纳米气泡的稳定性.It was aimed to study the stability of bulk nanobubbles,molecular dynamics simulations were performed to study the formation and lifetime of bulk nanobubbles.It was found that unexpected high densities of gas states could be held for these nanobubbles.In addition,a gas flux was introduced to characterize the exchange rate of gas molecules between nanobubble and bulk water.The lifetimes of nanobubbles were estimated in the realistic systems based on the gas flux.It was found that the lifetime increased with the size of bulk nanobubbles.These results were expected to be helpful for the understanding of the stability of bulk nanobubbles.

关 键 词：体相纳米气泡 分子动力学 甲烷 寿命 

分 类 号：O352[理学—流体力学]