Three-dimensional simulation of a self-propelled fish-like body swimming in a channel

Zhang, Yanrong; Kihara, Hisashi; Abe, Ken

doi:10.1080/19942060.2018.1453381

“…Moreover, it has been improved upon numerous times since its initial conception [52][53][54][55][56][57][58]115]. It has been previously used in numerous applications ranging from physiological flows, such as those in cardiac fluid dynamics [59][60][61], blood vessels [62], lymphatic capillaries [63], to aquatic locomotion [64][65][66][67] to animal flight [68,69] to flow past biological structures, such as vegetation [70], leaves [71], seeds [72], corals [73], or biofilms [74].…”

Section: Mathematical Methodsmentioning

confidence: 99%

Hopscotching jellyfish: combining different duty cycle kinematics can lead to enhanced swimming performance

Baldwin¹,

Battista²

2021

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Jellyfish (Medusozoa) have been deemed the most energy-efficient animals in the world. Their bell morphology and relatively simple nervous systems make them attractive to robotocists. Although, the science community has devoted much attention to understanding their swimming performance, there is still much to be learned about the jet propulsive locomotive gait displayed by prolate jellyfish. Traditionally, computational scientists have assumed uniform duty cycle kinematics when computationally modeling jellyfish locomotion. In this study we used fluid-structure interaction modeling to determine possible enhancements in performance from shuffling different duty cycles together across multiple Reynolds numbers and contraction frequencies. Increases in speed and reductions in cost of transport were observed as high as 80% and 50%, respectively. Generally, the net effects were greater for cases involving lower contraction frequencies. Overall, robust duty cycle combinations were determined that led to enhanced or impeded performance.

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“…Moreover, it has been improved upon numerous times since its initial conception [50,51,52,53,54,55,56]. It has previously used in numerous applications ranging from physiological flows, such as those in cardiac fluid dynamics [57,58,59], blood vessels [60], lymphatic capillaries [61], to aquatic locomotion [62,63,64,65,66] to animal flight [67,68] to flow past biological structures, such as vegetation [69], leaves [70], seeds [71], or corals [72].…”

Section: Mathematical Methodsmentioning

confidence: 99%

Hopscotching Jellyfish: combining different duty cycle kinematics can lead to enhanced swimming performance

Baldwin,

Battista

2021

Preprint

0

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Jellyfish (Medusozoa) have been deemed the most energy-efficient animals in the world. Their bell morphology and relatively simple nervous systems make them attractive to robotocists. Although, the science community has devoted much attention to understanding their swimming performance, there is still much to be learned about the jet propulsive locomotive gait displayed by prolate jellyfish. Traditionally, computational scientists have assumed uniform duty cycle kinematics when computationally modeling jellyfish locomotion. In this study we used fluid-structure interaction modeling to determine possible enhancements in performance from shuffling different duty cycles together across multiple Reynolds numbers and contraction frequencies. Increases in speed and reductions in cost of transport were observed as high as 80% and 50%, respectively. Generally, the net effects were greater for cases involving lower contraction frequencies. Overall, robust duty cycle combinations were determined that led to enhanced or impeded performance.

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“…Te wave motion pattern of anguilli was optimized and analyzed by Kern and Koumoutsakos [10], and quantitative information of three-dimensional fuid body interactions was provided by current results. Te infuence of the kinematic characteristics of fsh swimming in the water channel with antiskid wall on its swimming performance was discussed by Zhang et al [11] using the threedimensional simulation method. Te results indicated that the thrust generation mechanism was provided by the velocity feld and vorticity feld around the model, and the infuence of kinematics on swimming performance was emphasized.…”

Section: Introductionmentioning

confidence: 99%

Flow Characteristics of a Fish-Like Body Based on Taguchi Method under Different Strouhal Numbers

Guo

¹

,

Xu

²

,

Zheng

³

et al. 2022

Mathematical Problems in Engineering

1

0

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In the investigations of fish swimming, the relationship between fish swimming and the corresponding characteristics of flow field attracts lots of attention. In this paper, the influence of different Strouhal numbers on the flow field characteristics and mechanical characteristics of fish-like body is investigated. It is found that the strength of the anti-Karman vortex and the thrust on the fish-like body are affected by the Strouhal number. When the Strouhal number is small, the thrust coefficient is small but the propulsion efficiency is high. Similarly, when the Strouhal number is large, the thrust coefficient is large and the propelling efficiency is low. In order to better reveal the swimming status of the flexible body of the fish imitation, the effect of the Strouhal number is analyzed in detail in this paper. Besides, the influence of the three parameters in the Strouhal number formula on the flow field characteristics and thrust coefficient of the fish-like body is further investigated by the Taguchi method. The thrust coefficient is positively correlated with the swing amplitude and frequency, which is found to be negatively correlated with the inflow velocity. Swing amplitude and swing frequency are the main factors affecting the thrust coefficient; there is little effect of the inflow velocity on the thrust coefficient.

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Three-dimensional simulation of a self-propelled fish-like body swimming in a channel

Cited by 13 publications

References 36 publications

Hopscotching jellyfish: combining different duty cycle kinematics can lead to enhanced swimming performance

Hopscotching jellyfish: combining different duty cycle kinematics can lead to enhanced swimming performance

Hopscotching Jellyfish: combining different duty cycle kinematics can lead to enhanced swimming performance

Flow Characteristics of a Fish-Like Body Based on Taguchi Method under Different Strouhal Numbers

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