3D hydrodynamic interactions lead to divergences in 2D diffusion. (29th April 2015)

• Record Type: Journal Article
• Authors: Bleibel, Johannes; Domínguez, Alvaro; Oettel, Martin
• Is Part Of: Journal of physics. Volume 27:Number 19(2015)
• Publication Date: 2015-04-29
• Subjects: hydrodynamic interactions -- colloids -- confinement -- collective diffusion -- anomalous diffusion; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/0953-8984/27/19/194113
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: 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.