| Semiflexible polymer conformation, distribution and migration in microcapillary flows. | |
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MedLine Citation:
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PMID: 21508477 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The flow behavior of a semiflexible polymer in microchannels is studied using multiparticle collision dynamics, a particle-based hydrodynamic simulation technique. Conformations, distributions, and radial cross-streamline migration are investigated for various bending rigidities, with persistence lengths L(p) in the range 0.5 ≤ L(p)/L(r) ≤ 30. The flow behavior is governed by the competition between a hydrodynamic lift force and steric repulsion from the wall, which lead to migration away from the wall, and a locally varying flow induced orientation, which drives the polymer away from the channel center and towards the wall. The different dependences of these effects on the polymer bending rigidity and the flow velocity results in a complex dynamical behavior. However, a generic effect is the appearance of a maximum in the monomer and the center-of-mass distributions, which occurs at the channel center for small flow velocities, but moves off-center at higher velocities. |
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Authors:
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Raghunath Chelakkot; Roland G Winkler; Gerhard Gompper |
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Publication Detail:
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Type: Journal Article Date: 2011-04-20 |
Journal Detail:
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Title: Journal of physics. Condensed matter : an Institute of Physics journal Volume: 23 ISSN: 1361-648X ISO Abbreviation: J Phys Condens Matter Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-04-21 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101165248 Medline TA: J Phys Condens Matter Country: England |
Other Details:
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Languages: eng Pagination: 184117 Citation Subset: IM |
Affiliation:
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Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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