Stick boundary condition at large hard sphere arising from effective attraction in binary hard-sphere mixtures

Yuka Nakamura, Akira Yoshimori, Ryo Akiyama, Tsuyoshi Yamaguchi

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)

抄録

We have studied the diffusion of a large hard-sphere solute immersed in binary hard-sphere mixtures. We reveal how the boundary condition at the solute surface is affected by the solvent density around the solute. Solving equations for a binary compressible mixture by perturbation expansions, we obtain the boundary condition depending on the size ratio of binary solvent spheres. When the size ratio is 1:2, the boundary condition lies close to the slip boundary condition. By contrast, when the size ratio becomes large, the boundary condition approaches the stick boundary condition with the addition of larger solvent spheres. We find that the transition to the stick boundary condition is caused by the increase in the solvent density around the solute due to an entropic effect.

本文言語英語
論文番号124502
ジャーナルJournal of Chemical Physics
148
12
DOI
出版ステータス出版済み - 3 28 2018

All Science Journal Classification (ASJC) codes

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

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