Study of self-propelled pufferfish driven by multiple fins: a comparison between rigid and deformable fins

Ruoxin Li, Qing Xiao, Lijun Li, Hao Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

In this work, we numerically studied the steady swimming of a pufferfish driven by the undulating motion of its dorsal, anal and caudal fins. The simulations are based on experimentally measured kinematics. To model the self-propelled fish swimming, a Computational Fluid Dynamics (CFD) tool was coupled with a Multi-Body-Dynamics (MBD) technique.

It is widely accepted that deformable/flexible or undulating fins are better than rigid fins in terms of propulsion efficiency. To elucidate the underlying mechanism, we established an undulating fins model based on the kinematics of live fish, and conducted a simulation under the same operating conditions as rigid fins. The results presented here agree with this view by showing that the contribution of undulating fins to propulsion efficiency is significantly larger than that of rigid fins.
Original languageEnglish
Title of host publicationASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering
Place of PublicationNew York
Number of pages8
Volume7A
DOIs
Publication statusPublished - 25 Jun 2017
EventASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2017 - Trondheim, Norway
Duration: 25 Jun 201730 Jun 2017

Conference

ConferenceASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2017
Abbreviated titleOMAE 2017
Country/TerritoryNorway
CityTrondheim
Period25/06/1730/06/17

Keywords

  • fish locomotion
  • computational fluid dynamics (CFD)
  • multi-body dynamics (MBD)
  • undulating fins
  • propulsion efficiency

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