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@ARTICLE{Tao:61756,
author = {Tao, Y.-G. and Götze, I.O. and Gompper, G.},
title = {{M}ultiparticle collision dynamics modeling of viscoelastic
fluids},
journal = {The journal of chemical physics},
volume = {128},
issn = {0021-9606},
address = {Melville, NY},
publisher = {American Institute of Physics},
reportid = {PreJuSER-61756},
pages = {144902-1 - 144902-12},
year = {2008},
note = {Record converted from VDB: 12.11.2012},
abstract = {In order to investigate the rheological properties of
viscoelastic fluids by mesoscopic hydrodynamics methods, we
develop a multiparticle collision (MPC) dynamics model for a
fluid of harmonic dumbbells. The algorithm consists of
alternating streaming and collision steps. The advantage of
the harmonic interactions is that the integration of the
equations of motion in the streaming step can be performed
analytically. Therefore, the algorithm is computationally as
efficient as the original MPC algorithm for Newtonian
fluids. The collision step is the same as in the original
MPC method. All particles are confined between two solid
walls moving oppositely, so that both steady and oscillatory
shear flows can be investigated. Attractive wall potentials
are applied to obtain a nearly uniform density everywhere in
the simulation box. We find that both in steady and
oscillatory shear flows, a boundary layer develops near the
wall, with a higher velocity gradient than in the bulk. The
thickness of this layer is proportional to the average
dumbbell size. We determine the zero-shear viscosities as a
function of the spring constant of the dumbbells and the
mean free path. For very high shear rates, a very weak
"shear thickening" behavior is observed. Moreover, storage
and loss moduli are calculated in oscillatory shear, which
show that the viscoelastic properties at low and moderate
frequencies are consistent with a Maxwell fluid behavior. We
compare our results with a kinetic theory of dumbbells in
solution, and generally find good agreement.},
keywords = {Colloids: chemistry / Computer Simulation / Elasticity /
Microfluidics: methods / Models, Chemical / Models,
Molecular / Molecular Conformation / Shear Strength /
Viscosity / Colloids (NLM Chemicals) / J (WoSType)},
cin = {IFF-2 / JARA-SIM},
ddc = {540},
cid = {I:(DE-Juel1)VDB782 / I:(DE-Juel1)VDB1045},
pnm = {Kondensierte Materie},
pid = {G:(DE-Juel1)FUEK414},
shelfmark = {Physics, Atomic, Molecular $\&$ Chemical},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:18412477},
UT = {WOS:000255470300061},
doi = {10.1063/1.2850082},
url = {https://juser.fz-juelich.de/record/61756},
}