Analytic modeling of a size-changing swimmer
Analytic modeling of a size-changing swimmer
Cephalopods use large-scale structural deformation to propel themselves underwater, changing their internal volume by 20-50%. In this work, the hydroelastic response of a swimmer comprised of a fluid-filled elastic-membrane is studied via an analytic formulation of two coupled non-linear dynamic equations. This model of the self-propelled soft-body dynamics incorporates the inter- play of the external and internal added-mass variations. We compare the model against recent experiments for a body which abruptly reduces its cross-section to eject a single jet of fluid mass. Using the model we study the impact of size-change excitation on sustained swimming speeds and efficiency.
International Union of Theoretical and Applied Mechanics
Weymouth, Gabriel
b0c85fda-dfed-44da-8cc4-9e0cc88e2ca0
Giorgio-Serchi, Francesco
8571dc14-19c1-4ed1-8080-d380736a6ffa
June 2018
Weymouth, Gabriel
b0c85fda-dfed-44da-8cc4-9e0cc88e2ca0
Giorgio-Serchi, Francesco
8571dc14-19c1-4ed1-8080-d380736a6ffa
Weymouth, Gabriel and Giorgio-Serchi, Francesco
(2018)
Analytic modeling of a size-changing swimmer.
In IUTAM Symposium on Critical flow dynamics involving moving/deformable structures with design applications.
International Union of Theoretical and Applied Mechanics..
Record type:
Conference or Workshop Item
(Paper)
Abstract
Cephalopods use large-scale structural deformation to propel themselves underwater, changing their internal volume by 20-50%. In this work, the hydroelastic response of a swimmer comprised of a fluid-filled elastic-membrane is studied via an analytic formulation of two coupled non-linear dynamic equations. This model of the self-propelled soft-body dynamics incorporates the inter- play of the external and internal added-mass variations. We compare the model against recent experiments for a body which abruptly reduces its cross-section to eject a single jet of fluid mass. Using the model we study the impact of size-change excitation on sustained swimming speeds and efficiency.
Text
Weymouth_IUTAM_Symposium_Santorini_2018
- Accepted Manuscript
Text
Weymouth_IUTAM_Symposium_Santorini_2018
Restricted to Repository staff only
Request a copy
More information
Published date: June 2018
Venue - Dates:
IUTAM SYMPOSIUM SANTORINI 2018<br/>: “Critical flow dynamics involving moving/deformable structures with design applications”, , Santorini, Greece, 2018-06-17 - 2018-06-21
Identifiers
Local EPrints ID: 421567
URI: http://eprints.soton.ac.uk/id/eprint/421567
PURE UUID: 2a568dab-2a5b-4c70-9d8d-cc2a99e6e16c
Catalogue record
Date deposited: 15 Jun 2018 16:30
Last modified: 18 Feb 2021 17:21
Export record
Contributors
University divisions
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
