Abstract
| Original language | English |
|---|---|
| Article number | 106908 |
| Number of pages | 18 |
| Journal | Ocean Engineering |
| Volume | 197 |
| Early online date | 9 Jan 2020 |
| DOIs | |
| Publication status | Published - 1 Feb 2020 |
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Keywords
- self-propelled
- median-Paired fin (MPF) mode
- pufferfish
- multiple fins
- multi-body dynamics
- computational fluid dynamics
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Computational investigation on a self-propelled pufferfish driven by multiple fins. / Li, Ruoxin; Xiao, Qing; Liu, Yuanchuan; Li, Lijun; Liu, Hao.
In: Ocean Engineering, Vol. 197, 106908, 01.02.2020.Research output: Contribution to journal › Article
TY - JOUR
T1 - Computational investigation on a self-propelled pufferfish driven by multiple fins
AU - Li, Ruoxin
AU - Xiao, Qing
AU - Liu, Yuanchuan
AU - Li, Lijun
AU - Liu, Hao
PY - 2020/2/1
Y1 - 2020/2/1
N2 - Based on experimental measurements of a live fish, a numerical model is established for a pufferfish driven by the locomotion of its multiple flexible fins. The self-propelled motion of the fish is investigated under unsteady swimming conditions, including the accelerating and subsequent quasi-steady stages, to analyse the motion mechanisms of a real fish model with multiple flexible fins. Present numerical approach combines Computational Fluid Dynamics (CFD) and Multi-Body Dynamics (MBD), which allows for the analysis of the interaction between fluid and a fish with multiple fins. Benefitting from the available experimental data of the live fish, the deformation of each fin surface can be prescribed, and we name this condition as flexible in this paper. To elucidate the impact of flexible fins on the propulsion performance of fish swimming, simulations are also performed for rigid fins with the same kinematic motion profiles imposed on the leading edge of fin surfaces. With the developed tool, unsteady hydrodynamic forces, vortex interaction between body and fins associated with MPF swimming mode are numerically predicted. The obtained results highlight the effect of flexibility of fins on thrust generation and efficiency improvement for fish undergoing free swimming.
AB - Based on experimental measurements of a live fish, a numerical model is established for a pufferfish driven by the locomotion of its multiple flexible fins. The self-propelled motion of the fish is investigated under unsteady swimming conditions, including the accelerating and subsequent quasi-steady stages, to analyse the motion mechanisms of a real fish model with multiple flexible fins. Present numerical approach combines Computational Fluid Dynamics (CFD) and Multi-Body Dynamics (MBD), which allows for the analysis of the interaction between fluid and a fish with multiple fins. Benefitting from the available experimental data of the live fish, the deformation of each fin surface can be prescribed, and we name this condition as flexible in this paper. To elucidate the impact of flexible fins on the propulsion performance of fish swimming, simulations are also performed for rigid fins with the same kinematic motion profiles imposed on the leading edge of fin surfaces. With the developed tool, unsteady hydrodynamic forces, vortex interaction between body and fins associated with MPF swimming mode are numerically predicted. The obtained results highlight the effect of flexibility of fins on thrust generation and efficiency improvement for fish undergoing free swimming.
KW - self-propelled
KW - median-Paired fin (MPF) mode
KW - pufferfish
KW - multiple fins
KW - multi-body dynamics
KW - computational fluid dynamics
U2 - 10.1016/j.oceaneng.2019.106908
DO - 10.1016/j.oceaneng.2019.106908
M3 - Article
VL - 197
JO - Ocean Engineering
JF - Ocean Engineering
SN - 0029-8018
M1 - 106908
ER -