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Hydrodynamic induced deformation and orientation of a microscopic elastic filament.

TitleHydrodynamic induced deformation and orientation of a microscopic elastic filament.
Publication TypeJournal Article
Year of Publication2005
AuthorsCosentino Lagomarsino, M, Pagonabarraga, I, Lowe, CP
JournalPhys Rev Lett
Volume94
Issue14
Pagination148104
Date Published2005 Apr 15
ISSN0031-9007
KeywordsActin Cytoskeleton, Cilia, Elasticity, Flagella, Models, Biological, Models, Theoretical
Abstract

We describe simulations of an elastic filament immersed in a fluid and subjected to a body force. The coupling between the fluid flow and the friction that the filament experiences induces bending and alignment perpendicular to the force. With increasing force there are four shape regimes, ranging from slight distortion to an unsteady tumbling motion. We also find marginally stable structures. The instability of these shapes and the alignment are explained by induced bending and nonlocal hydrodynamic interactions. These effects are experimentally relevant for stiff microfilaments.

Alternate JournalPhys. Rev. Lett.
PubMed ID15904118