An actuated elastic sheet interacting with passive and active structures in a viscoelastic fluid

J. C. Chrispell, L. J. Fauci, Michael Shelley

Research output: Contribution to journalArticle

Abstract

We adapt the classic Taylor swimming sheet set-up to investigate both the transient and long-time dynamics of an actuated elastic sheet immersed in a viscoelastic fluid as it interacts with neighboring structures. While the preferred kinematics of the sheet are specified, the flexible sheet interacts with the surrounding fluid and other structures, and its realized kinematics emerges from this coupling. We use an immersed boundary framework to evolve the Oldroyd-B/Navier-Stokes equations and capture the spatial and temporal development of viscoelastic stresses and sheet shape. We compare the dynamics when the actuated sheet swims next to a free elastic membrane, with and without bending rigidity, and next to a fixed wall. We demonstrate that the sheets can exploit the neighboring structures to enhance their swimming speed and efficiency, and also examine how this depends upon fluid viscoelasticity. When the neighboring structure is likewise an actuated elastic sheet, we investigate the viscoelastic dynamics of phase-locking.

Original languageEnglish (US)
Article number013103
JournalPhysics of Fluids
Volume25
Issue number1
DOIs
StatePublished - Jan 2 2013

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elastic sheets
Fluids
fluids
Kinematics
Viscoelasticity
Rigidity
Navier Stokes equations
kinematics
Membranes
viscoelasticity
rigidity
Navier-Stokes equation
locking
membranes
Swimming

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

An actuated elastic sheet interacting with passive and active structures in a viscoelastic fluid. / Chrispell, J. C.; Fauci, L. J.; Shelley, Michael.

In: Physics of Fluids, Vol. 25, No. 1, 013103, 02.01.2013.

Research output: Contribution to journalArticle

Chrispell, J. C. ; Fauci, L. J. ; Shelley, Michael. / An actuated elastic sheet interacting with passive and active structures in a viscoelastic fluid. In: Physics of Fluids. 2013 ; Vol. 25, No. 1.
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