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@ARTICLE{Theers:155428,
author = {Theers, Mario and Winkler, Roland G.},
title = {{E}ffects of thermal fluctuations and fluid compressibility
on hydrodynamic synchronization of microrotors at finite
ocillatory {R}eynolds number: a multiparticle collision
dynamics simulation study},
journal = {Soft matter},
volume = {10},
number = {32},
issn = {1744-6848},
address = {Cambridge},
publisher = {Royal Society of Chemistry (RSC)},
reportid = {FZJ-2014-04594},
pages = {5894 -},
year = {2014},
abstract = {We investigate the emergent dynamical behavior of
hydrodynamically coupled microrotors by means of
multiparticle collision dynamics (MPC) simulations. The two
rotors are confined in a plane and move along circles driven
by active forces. Comparing simulations to theoretical
results based on linearized hydrodynamics, we demonstrate
that time-dependent hydrodynamic interactions lead to
synchronization of the rotational motion. Thermal noise
implies large fluctuations of the phase-angle difference
between the rotors, but synchronization prevails and the
ensemble-averaged time dependence of the phase-angle
difference agrees well with analytical predictions.
Moreover, we demonstrate that compressibility effects lead
to longer synchronization times. In addition, the relevance
of the inertia terms of the Navier–Stokes equation are
discussed, specifically the linear unsteady acceleration
term characterized by the oscillatory Reynolds number ReT.
We illustrate the continuous breakdown of synchronization
with the Reynolds number ReT, in analogy to the continuous
breakdown of the scallop theorem with decreasing Reynolds
number.},
cin = {IAS-2 / ICS-2},
ddc = {530},
cid = {I:(DE-Juel1)IAS-2-20090406 / I:(DE-Juel1)ICS-2-20110106},
pnm = {451 - Soft Matter Composites (POF2-451)},
pid = {G:(DE-HGF)POF2-451},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000340474400005},
doi = {10.1039/C4SM00770K},
url = {https://juser.fz-juelich.de/record/155428},
}