Validation of Bubble Dynamics Equation for a Nano-scale Bubble via Molecular Dynamics Simulation

9th International Symposium on Cavitation

Tsuda, Shin-Ichi^1 ; Hyodo, H.^2 ; Watanabe, S.^1

Department of Mechanical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka

819-0395, Japan^1

Department of Mechanical Engineering, Graduate School of Kyushu University, 744 Motooka, Nishi-ku, Fukuoka

819-0395, Japan^2

关键词: Bubble behaviour;    Bubble dynamics;    MD simulation;    Molecular dynamics methods;    Molecular dynamics simulations;    Non-condensable gas;    One-component fluids;    Two-component;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012039/pdf
DOI  :  10.1088/1742-6596/656/1/012039

来源: IOP

【 摘 要 】

For a validation of the application of conventional bubble dynamics to a nano-scale bubble behaviour, we simulated a nano-scale bubble collapsing or vibration by Molecular Dynamics (MD) method and compared the result with the solution of Rayleigh-Plesset (RP) equation and that of Confined RP (CRP) equation, whose boundary condition was corrected to be consistent with that of MD simulation. As a result, a good coincidence was obtained between MD, RP, and CRP in the case of one-component fluid. In addition, also a good correspondence was obtained particularly in the comparison between MD and CRP in the case of two-component fluid containing non-condensable gas. The present results indicate that conventional bubble dynamics equation can be applied even to a nano-scale tiny bubble.