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 |
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論文番号 | 124502 |
ジャーナル | Journal of Chemical Physics |
巻 | 148 |
号 | 12 |
DOI | |
出版ステータス | 出版済み - 3月 28 2018 |
!!!All Science Journal Classification (ASJC) codes
- 物理学および天文学(全般)
- 物理化学および理論化学