3D hydrodynamic interactions lead to divergences in 2D diffusion

被引：17
作者：
Bleibel, Johannes [1 ,2 ]
Dominguez, Alvaro [3 ]
Oettel, Martin [1 ]
机构：
[1] Univ Tubingen, Inst Angew Phys, D-72076 Tubingen, Germany
[2] Max Planck Inst Intelligente Syst, D-70569 Stuttgart, Germany
[3] Univ Seville, Fis Teor, E-41080 Seville, Spain
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2015年 / 27卷 / 19期
关键词：
hydrodynamic interactions; colloids; confinement; collective diffusion; anomalous diffusion; LIGHT-SCATTERING; BROWNIAN-MOTION; SEDIMENTATION; SUSPENSIONS; TRANSPORT; DIMENSIONS; SPHERES;
D O I：
10.1088/0953-8984/27/19/194113
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We investigate the influence of 3D hydrodynamic interactions on confined colloidal suspensions, where only the colloids are restricted to one or two dimensions. In the absence of static interactions among the colloids, i.e., an ideal gas of colloidal particles with a finite hydrodynamic radius, we find a divergent collective diffusion coefficient. The origin of the divergence is traced back to the dimensional mismatch of 3D hydrodynamic interactions and the colloidal particles moving only in 1D or 2D. Our results from theory are confirmed by Stokesian dynamics simulations and supported by light scattering observational data for particles at a fluid interface.
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页数：11
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