Analytic modeling of a size-changing swimmer

Gabriel Weymouth, Francesco Giorgio-Serchi

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract / Description of output

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.
Original languageEnglish
Title of host publicationIUTAM Symposium on Critical flow dynamics involving moving/deformable structures with design applications
PublisherInternational Union of Theoretical and Applied Mechanics
Publication statusPublished - 1 Jun 2018


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