Evaporation and condensation at a liquid surface. I. Argon

Kenji Yasuoka, Mitsuhiro Matsumoto, Yosuke Kataoka

研究成果: Article

89 引用 (Scopus)

抜粋

Molecular dynamics computer simulations were carried out to investigate the dynamics of evaporation and condensation for argon at the temperature of 80 and 100 K. From the decrease of the survival probability of vapor molecules, the ratio of self reflection to collision is estimated to be 12%-15%, only weakly dependent on the temperature. This suggests that argon vapor molecules are in the condition of almost complete capture, and the condensation is considered to be a barrierless process. The total ratio of reflection which is evaluated with the flux correlation of condensation and evaporation is 20% at both temperature. The difference between these two ratios of reflection is ascribed to a phenomenon that vapor molecules colliding with the surface drive out other liquid molecules. This molecule exchange at the surface is as important as the self-reflection, and the conventional picture of condensation as a unimolecular chemical reaction is not appropriate.

元の言語English
ページ(範囲)7904-7911
ページ数8
ジャーナルThe Journal of Chemical Physics
101
発行部数9
DOI
出版物ステータスPublished - 1994 1 1
外部発表Yes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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