Journal Article

PreJuSER-10786

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Migration of semiflexible polymers in microcapillary flow

Chelakkot, R.FZJ* ; Winkler, R. G.FZJ* ; Gompper, G.FZJ*

2010
EDP Sciences Les Ulis

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Please use a persistent id in citations: doi:10.1209/0295-5075/91/14001

Abstract: The non-equilibrium structural and dynamical properties of a semiflexible polymer confined in a cylindrical microchannel and exposed to a Poiseuille flow is studied by mesoscale hydrodynamic simulations. For a polymer with a length half of its persistence length, large variations in orientation and conformations are found as a function of radial distance and flow strength. In particular, the polymer exhibits U-shaped conformations near the channel center. Hydrodynamic interactions lead to strong cross-streamline migration. Outward migration is governed by the polymer orientation and the corresponding anisotropy in its diffusivity. Strong tumbling motion is observed, with a tumbling time which exhibits the same dependence on Peclet number as a polymer in shear flow. Copyright (C) EPLA, 2010

Keyword(s): J

Note: We thank T. PFOHL (Basel) for stimulating discussions. The financial support by the Deutsche Forschungsgemeinschaft within the Priority Program "Nano- and Microfluidics" (SPP 1164) is gratefully acknowledged.

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Contributing Institute(s):

1. Theorie der Weichen Materie und Biophysik (IFF-2)
2. Theorie der Weichen Materie und Biophysik (IAS-2)
3. Jülich Aachen Research Alliance - High-Performance Computing (JARA-HPC)

Research Program(s):

1. BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung (P45)

Appears in the scientific report 2010

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Database coverage:
JCR ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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