2003/02/05 by E. Falck, Emma Falck, J. M. Lahtinen +4 · 1 citation
Materials Science · Physics and Astronomy · #Block Copolymer Self-Assembly #Material Dynamics and Properties #Theoretical and Computational Physics #cond-mat.soft
paper · pdf · doi:10.1140/epje/i2003-10075-9
arxiv created 2003/02/05 · openalex publication_date 2004/03/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
We study many-particle diffusion in 2D colloidal suspensions with full hydrodynamic interactions through a novel mesoscopic simulation technique. We focus on the behaviour of the effective scaled tracer and collective diffusion coefficients DT(ρ) / D0 and DC(ρ) / D0, where D0 is the single-particle diffusion coefficient, as a function of the density of the colloids ρ. At low Schmidt numbers Sc=\cal O(1), we find that hydrodynamics has essentially no effect on the behaviour of DT(ρ)/D0. At larger Sc, DT(ρ)/D0 is enhanced at all densities, although the differences compared to the case without hydrodynamics are minor. The collective diffusion coefficient, on the other hand, is much more strongly coupled to hydrodynamical conservation laws and is distinctly different from the purely dissipative case.