TY - GEN
T1 - Fluid–Body Interactions in Fish-Like Swimming
AU - Majumdar, Dipanjan
AU - Bose, Chandan
AU - Dhareshwar, Prerna
AU - Sarkar, Sunetra
N1 - Publisher Copyright:
© 2021, Springer Nature Singapore Pte Ltd.
PY - 2020/10/12
Y1 - 2020/10/12
N2 - The present study focuses on formulating a fluid–structure interaction (FSI) framework by coupling a finite element analysis (FEA) based structural solver and a lumped vortex method (LVM) based potential flow solver to study the coupled dynamics involved in the undulatory and oscillatory swimming of fishes. The caudal fin of a carangiform fish is modelled as a continuous cantilever beam with a periodic support motion. The effect of the actuation frequency on the thrust coefficient is investigated. A significant increase in the aerodynamic thrust is noticed for the support motion frequencies nearing to the structural natural frequencies of the beam. Next, the whole fish body, considering the full-body undulations, is modelled as a continuous free-free beam. This model incorporates a time-dependent actuating moment varying along the length of the body which can be attributed to the muscle moments generated by the fish. A parametric study is carried out to obtain maximum thrust output for the muscle power input in terms of the actuation moment. It is observed that the generated thrust increases significantly when the frequency of the actuation moment approaches towards the natural frequencies of the free-free beam. A comparative study of the average thrust coefficient is carried out for these two cases.
AB - The present study focuses on formulating a fluid–structure interaction (FSI) framework by coupling a finite element analysis (FEA) based structural solver and a lumped vortex method (LVM) based potential flow solver to study the coupled dynamics involved in the undulatory and oscillatory swimming of fishes. The caudal fin of a carangiform fish is modelled as a continuous cantilever beam with a periodic support motion. The effect of the actuation frequency on the thrust coefficient is investigated. A significant increase in the aerodynamic thrust is noticed for the support motion frequencies nearing to the structural natural frequencies of the beam. Next, the whole fish body, considering the full-body undulations, is modelled as a continuous free-free beam. This model incorporates a time-dependent actuating moment varying along the length of the body which can be attributed to the muscle moments generated by the fish. A parametric study is carried out to obtain maximum thrust output for the muscle power input in terms of the actuation moment. It is observed that the generated thrust increases significantly when the frequency of the actuation moment approaches towards the natural frequencies of the free-free beam. A comparative study of the average thrust coefficient is carried out for these two cases.
UR - http://www.scopus.com/inward/record.url?scp=85094150510&partnerID=8YFLogxK
U2 - 10.1007/978-981-15-5862-7_41
DO - 10.1007/978-981-15-5862-7_41
M3 - Conference contribution
AN - SCOPUS:85094150510
SN - 9789811558610
SN - 978-981-15-5862-7
T3 - Lecture Notes in Mechanical Engineering
SP - 509
EP - 519
BT - Advances in Structural Vibration
A2 - Dutta, Subashisa
A2 - Inan, Esin
A2 - Dwivedy, Santosha Kumar
PB - Springer
T2 - 13th International Conference on Vibrational Problems, ICoVP 2017
Y2 - 29 November 2017 through 2 December 2017
ER -