Theoretical study on the stability of nanobubbles and its verification in molecular dynamics simulation  

作　　者：Sheng Mi Chaofeng Hou Wei Ge 

机构地区：[1]School of Chemical Engineering and Technology,Tianjin University,Tianjin,300072,China [2]State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing.100190,China [3]School of Chemical Engineering,University of Chinese Academy of Sciences,Beijing,100049,China

出　　处：《Particuology》2024年第4期99-105,共7页颗粒学报（英文版）

基　　金：support from the Major Program of the National Natural Science Foundation of China (grant No.22293024);the Science Fund for Creative Research Groups of the National Natural Science Foundation of China (grant No.21821005);the Project for Young Scientists in Basic Research of Chinese Academy of Sciences (grant No.YSBR-043).

摘　　要：The stability of vapor nanobubbles in bulk liquid was investigated theoretically and the critical bubble size was derived from macroscale thermodynamic equations,below which the system destabilizes with sharp drop in pressure.This critical size was quantitatively verified in molecular dynamic simulation using the Lennard-Jones model of argon,where stronger attraction between the molecules at lower density is found to contribute most to the drop of system pressure and,as the Laplace pressure on the curved bubble interface fails to balance the pressure difference across the interface,the bubbles become unstable.The theoretical model could be extended to other systems where reliable equations of state and interfacial tension are available.

关 键 词：NANOBUBBLE Stability Phase diagram Critical size 

分 类 号：O17[理学—数学]