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@ARTICLE{Saggiorato:256219,
author = {Saggiorato, Guglielmo and Elgeti, Jens and Winkler, Roland
G. and Gompper, Gerhard},
title = {{C}onfirmations, hydrodynamic interactions, and
instabilities of sedimenting semiflexible filaments},
journal = {Soft matter},
volume = {11},
number = {37},
issn = {1744-6848},
address = {London},
publisher = {Royal Soc. of Chemistry},
reportid = {FZJ-2015-06195},
pages = {7337 - 7344},
year = {2015},
abstract = {The conformations and dynamics of semiflexible filaments
subject to a homogeneous external (gravitational) field,
e.g., in a centrifuge, are studied numerically and
analytically. The competition between hydrodynamic drag and
bending elasticity generates new shapes and dynamical
features. We show that the shape of a semiflexible filament
undergoes instabilities as the external field increases. We
identify two transitions that correspond to the excitation
of higher bending modes. In particular, for strong fields
the filament stabilizes in a non-planar shape, resulting in
a sideways drift or in helical trajectories. For two
interacting filaments, we find the same transitions, with
the important consequence that the new non-planar shapes
have an effective hydrodynamic repulsion, in contrast to the
planar shapes which attract themselves even when their
osculating planes are rotated with respect to each other.
For the case of planar filaments, we show analytically and
numerically that the relative velocity is not necessarily
due to a different drag of the individual filaments, but to
the hydrodynamic interactions induced by their shape
asymmetry.},
cin = {IAS-2 / ICS-2},
ddc = {530},
cid = {I:(DE-Juel1)IAS-2-20090406 / I:(DE-Juel1)ICS-2-20110106},
pnm = {553 - Physical Basis of Diseases (POF3-553)},
pid = {G:(DE-HGF)POF3-553},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000361550000014},
pubmed = {pmid:26270609},
doi = {10.1039/C5SM01069A},
url = {https://juser.fz-juelich.de/record/256219},
}