A fluid-structure interaction study on a passively deformed fish fin

Research output: Contribution to conferencePaper

1 Citation (Scopus)
15 Downloads (Pure)

Abstract

In this paper, the propulsive performance of a caudal peduncle-fin swimmer mimicking a bio-inspired robotic fish model is numerically studied using a fully coupled FSI solver. The model consists of a rigid peduncle and a flexible fin which pitches in a uniform flow. The flexible fin is modeled as a thin plate assigned with non-uniformly distributed stiffness. A finite volume method based in-house Navier-Stokes solver is used to solve the fluid equations while the fin deformation is resolved using a finite element code. The effect of the fin flexibility on the propulsive performance is investigated. The numerical results indicate that the compliance has a significant influence on the performance. Under the parameters studied in this paper, the medium flexible fin exhibits remarkable efficiency improvement as well as thrust augment, while the least flexible fin shows no obvious difference from the rigid one. However, for the most flexible fin, although the thrust production decreases sharply, the efficiency reaches the maximum value. It should be noted that by non-uniformly distributing the rigidity across the caudal fin, our model is able to replicate some fin deformation patterns observed in both the live fish and the experimental robotic fish.
Original languageEnglish
Number of pages11
DOIs
Publication statusPublished - 9 Jun 2019
Event38th International Conference on Ocean, Offshore & Arctic Engineering - Scottish Event Campus, Glasgow, United Kingdom
Duration: 9 Jun 201914 Jun 2019
Conference number: 2019
https://event.asme.org/OMAE

Conference

Conference38th International Conference on Ocean, Offshore & Arctic Engineering
Abbreviated titleOMAE
CountryUnited Kingdom
CityGlasgow
Period9/06/1914/06/19
Internet address

Keywords

  • propulsion
  • bio-inspired robotic fish model
  • fish fins
  • engineering

Fingerprint Dive into the research topics of 'A fluid-structure interaction study on a passively deformed fish fin'. Together they form a unique fingerprint.

  • Cite this

    Luo, Y., Xiao, Q., Shi, G., Yuan, Z., & Wen, L. (2019). A fluid-structure interaction study on a passively deformed fish fin. Paper presented at 38th International Conference on Ocean, Offshore & Arctic Engineering, Glasgow, United Kingdom. https://doi.org/10.1115/OMAE2019-95578