Flow-induced periodic snap-through dynamics

Kim, Hyeonseong; Lahooti, Mohsen; Kim, Junsoo; Kim, Daegyoum

doi:10.1017/jfm.2021.57

Cited by 19 publications

(29 citation statements)

References 56 publications

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“…The value of w 0 /L decreases with increasing L 0 /L. The experimental data of Kim et al (2021a) are included for comparison (0.0016 ≤ γ L 0 ≤ 0.0108). The present results show good agreement with the experimental data, validating the results of the present simulation.…”

Section: Resultsmentioning

confidence: 99%

“…A critical bending rigidity for the transition to the STO mode is obtained near γ L c = 0.0037 irrespective of L. The initial height w 0 is close to one-half of the maximum A in the STO mode, which is y x=0 in the initial shape. In figure 9(a), most of the curves y x=0 /w 0 end at the vertical fold points; that is, the instability follows a saddle-node bifurcation (Gomez, Moulton & Vella 2017b;Kim et al 2021a). Here, L 0 /L = 0.5 deviates substantially from the collapsed curve.…”

Section: Effects Of the Length And Bending Rigiditymentioning

confidence: 99%

“…rapid closure of a Venus flytrap (Forterre et al 2005) or a sudden upward flip of an umbrella in wind (Gomez, Moulton & Vella 2017a)). The flow-induced snap-through oscillation of a buckled elastic sheet is useful for energy harvesting (Kim et al 2020(Kim et al , 2021a. The buckled sheet exhibits large deflection with high strain energy during periodic oscillation.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Kim et al (2020) investigated an energy harvester based on flow-induced snap-through oscillation. They performed experiments to examine the critical conditions and snap-through dynamics (Kim et al 2021a;Kim, Kim & Kim 2021b). According to these studies, the fluid force increases with increasing flow velocity, inducing the snap-through oscillation.…”

Section: Introductionmentioning

confidence: 99%

“…The flow-induced snap-through oscillation of a buckled elastic sheet is useful for energy harvesting (Kim et al . 2020, 2021 a ). The buckled sheet exhibits large deflection with high strain energy during periodic oscillation.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Snap-through dynamics of a buckled flexible filament in a uniform flow

Mao,

Liu,

Sung

2023

J. Fluid Mech.

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The flow-induced snap-through dynamics of a buckled flexible filament was explored using the penalty immersed boundary method. The effects of the filament length, bending rigidity and Reynolds number on the mode transition were systematically examined. Three different modes were observed when the aforementioned parameters were varied: an equilibrium mode, a streamwise oscillation mode and a snap-through oscillation mode. Two mode transitions occurred when the bending rigidity was lowered and the length and Reynolds number were increased: a direct transition from the equilibrium mode to the snap-through oscillation mode and the successive appearance of the three modes. An increase in transverse fluid force induced the snap-through oscillation mode. A vortex-induced vibration and a self-excited vibration occurred in the streamwise oscillation mode and the snap-through oscillation mode, respectively. A wake pattern of 2S appeared in the streamwise oscillation mode, and a pattern of 2S + 2P appeared in the snap-through oscillation mode. A hysteresis was observed near the critical Reynolds number. The hysteresis loop increased in magnitude with increasing bending rigidity. The greater energy harvesting was achieved by the larger deflection and the higher strain energy. We found that most of the strain energy was concentrated in the last half of the filament.

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Section: Resultsmentioning

confidence: 99%

Section: Effects Of the Length And Bending Rigiditymentioning

confidence: 99%