A molecular dynamics analysis of homogeneous bubble nucleation with a noncondensable gas in cryogenic cavitation inception

Shinichi Tsuda, Tetsuo Hirata, Hiroyuki Tanaka

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1 Citation (Scopus)

Abstract

In this paper, homogeneous bubble nucleation in liquid oxygen (as one of the cryogenic fluids) with a noncondensable gas of nitrogen or that of helium was investigated using molecular dynamics method employing a fitted Lennard-Jones potential. We evaluated the influence of nitrogen gas and helium gas on the SATuration line (SAT) and the spinodal line as the thermodynamic limit of stability (TLS), and on the kinetic limit of stability (KLS) defined from a bubble nucleation rate. As a result, it was obtained that the influence of the noncondensable gases on the SAT and the TLS was negligible at molar fraction less than 1% although helium gas had several times stronger action to decrease the KLS compared with nitrogen gas. On the other hand, it was also indicated that the actual influence of both noncondensable gases on the cavitation inception in liquid oxygen might be negligible at least at standard conditions where the fluid starts to flow around or less than the atmospheric pressure.

Original languageEnglish
Pages (from-to)320-326
Number of pages7
JournalMolecular Simulation
Volume40
Issue number4
DOIs
Publication statusPublished - Mar 16 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Information Systems
  • Modelling and Simulation
  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics

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