Phys. Rev. Lett. 96, 158101 (2006) [4 pages]Pumping Fluids with Periodically Beating Grafted Elastic FilamentsReceived 19 October 2005; published 21 April 2006 Using Brownian dynamics simulations, we investigate the pumping efficiency of an array of periodically beating semiflexible filaments that are grafted to a surface. Full hydrodynamic interactions among and within filaments and no slip at the surface are considered. Optimal pumping is obtained for a characteristic ratio of applied forward-backward torques and filament persistence length. For independently driven filaments, phase locking between neighboring filaments occurs autonomously via hydrodynamic coupling, giving rise to significantly enhanced pumping efficiency. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.158101
DOI:
10.1103/PhysRevLett.96.158101
PACS:
87.19.St, 07.10.Cm, 47.15.G−, 87.16.Qp
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