Liquid-vapor nucleation simulation of Lennard-Jones fluid by molecular dynamics method

Marehito Sekine, Kenij Yasuoka, Tomoyuki Kinjo, Mitsuhiro Matsumoto

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The liquid-vapor nucleation phenomenon is important for understanding the initial stage of a process such as cavitation, boiling and phreatic explosion. The recent development in molecular simulation has enabled us to study the bubble nucleation phenomena from a molecular point of view. The molecular dynamics simulations of the homogeneous liquid-vapor nucleation for a Lennard-Jones fluid were carried out to microscopically investigate the initial stage of bubble formation. The system pressure was reduced by an uniform system expansion to initiate the liquid-vapor nucleation in the metastable state. The nucleation rate was calculated at three different temperatures by the survival probability of the bubble-free state. As a result, the nucleation rate was seven to nine orders of magnitude greater than that estimated by the classical nucleation theory and the ratio of the nucleation rate by molecular simulation to the classical theory depended on the temperature. The volume of the bubble nucleus was also calculated by two different methods.

Original languageEnglish
Pages (from-to)597-605
Number of pages9
JournalFluid Dynamics Research
Volume40
Issue number7-8
DOIs
Publication statusPublished - 2008 Jul 1

Keywords

  • Bubble nucleation
  • Metastable state
  • Molecular dynamics simulation
  • Negative pressure
  • Nucleation rate

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

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