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@ARTICLE{Heinen:16797,
author = {Heinen, M. and Banchio, A.J. and Nägele, G.},
title = {{S}hort-time rheology and diffusion in suspensions of
{Y}ukawa-type colloidal particles},
journal = {The journal of chemical physics},
volume = {135},
issn = {0021-9606},
address = {Melville, NY},
publisher = {American Institute of Physics},
reportid = {PreJuSER-16797},
pages = {154504},
year = {2011},
note = {M.H. acknowledges support by the International Helmholtz
Research School of Biophysics and Soft Matter (IHRS
BioSoft). A.J.B. acknowledges financial support from
SeCyT-UNC and CONICET. This work was under appropriation of
funds from the Deutsche Forschungsgemeinschaft (DFG)
(SFB-TR6, project B2).},
abstract = {A comprehensive study is presented on the short-time
dynamics in suspensions of charged colloidal spheres. The
explored parameter space covers the major part of the
fluid-state regime, with colloid concentrations extending up
to the freezing transition. The particles are assumed to
interact directly by a hard-core plus screened Coulomb
potential, and indirectly by solvent-mediated hydrodynamic
interactions. By comparison with accurate accelerated
Stokesian Dynamics (ASD) simulations of the hydrodynamic
function H(q), and the high-frequency viscosity η(∞), we
investigate the accuracy of two fast and easy-to-implement
analytical schemes. The first scheme, referred to as the
pairwise additive (PA) scheme, uses exact two-body
hydrodynamic mobility tensors. It is in good agreement with
the ASD simulations of H(q) and η(∞), for smaller volume
fractions up to about $10\%$ and $20\%,$ respectively. The
second scheme is a hybrid method combining the virtues of
the δγ scheme by Beenakker and Mazur with those of the PA
scheme. It leads to predictions in good agreement with the
simulation data, for all considered concentrations,
combining thus precision with computational efficiency. The
hybrid method is used to test the accuracy of a generalized
Stokes-Einstein (GSE) relation proposed by Kholodenko and
Douglas, showing its severe violation in low salinity
systems. For hard spheres, however, this GSE relation
applies decently well.},
keywords = {Colloids: chemistry / Computer Simulation / Diffusion /
Models, Chemical / Particle Size / Rheology / Suspensions /
Time Factors / Viscosity / Colloids (NLM Chemicals) /
Suspensions (NLM Chemicals) / J (WoSType)},
cin = {ICS-3},
ddc = {540},
cid = {I:(DE-Juel1)ICS-3-20110106},
pnm = {BioSoft: Makromolekulare Systeme und biologische
Informationsverarbeitung},
pid = {G:(DE-Juel1)FUEK505},
shelfmark = {Physics, Atomic, Molecular $\&$ Chemical},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:22029321},
UT = {WOS:000296516800034},
doi = {10.1063/1.3646962},
url = {https://juser.fz-juelich.de/record/16797},
}