Tracer diffusion in colloidal suspensions under dilute and crowded conditions with hydrodynamic interactions

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2012
Major/Subject
Mcode
Degree programme
Language
en
Pages
014503
Series
The Journal of Chemical Physics, Volume 137, Issue 1
Abstract
We consider tracer diffusion in colloidalsuspensions under solid loading conditions, where hydrodynamic interactions play an important role. To this end, we carry out computer simulations based on the hybrid stochastic rotation dynamics-molecular dynamics (SRD-MD) technique. Many details of the simulation method are discussed in detail. In particular, our choices for the SRD-MD parameters and for the different scales are adapted to simulating colloidalsuspensions under realistic conditions. Our simulation data are compared with published theoretical, experimental and numerical results and compared to Brownian dynamics simulation data. We demonstrate that our SRD-MD simulations reproduce many features of the hydrodynamics in colloidal fluids under finite loading. In particular, finite-size effects and the diffusive behavior of colloids for a range of volume fractions of the suspension show that hydrodynamic interactions are correctly included within the SRD-MD technique.
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Keywords
colloidal systems, diffusion, suspensions, hydrodynamics, solvents
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Citation
Tomilov, A. & Videcoq, A. & Chartier, T. & Ala-Nissilä, Tapio & Vattulainen, I. 2012. Tracer diffusion in colloidal suspensions under dilute and crowded conditions with hydrodynamic interactions. The Journal of Chemical Physics. Volume 137, Issue 1. 014503. 0021-9606 (printed). DOI: 10.1063/1.4731661.