Towards energy harvesting through flow-induced snap-through oscillations

Wang, Zhaokun; Zhao, Fuwang; Fu, Yu; Deng, Fang; Zeng, Lingwei; Cui, Jingyu

doi:10.1016/j.ijmecsci.2023.108428

Cited by 11 publications

(4 citation statements)

References 68 publications

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“…2023) and in the context of a single laminar channel flow (Wang et al. 2023). In this study, we examined the impact of L* on the snap-through oscillations of elastic sheets in a dual-channel flow system, with a special focus on the sheet's vortex generation performance.…”

Section: Resultsmentioning

confidence: 99%

“…The length ratio (L*) is reported to play a pivotal role in influencing the snap-through oscillations of elastic sheets in a uniform flow (Kim et al 2021a;Mao et al 2023) and in the context of a single laminar channel flow (Wang et al 2023). In this study, we examined the impact of L* on the snap-through oscillations of elastic sheets in a dual-channel flow system, with a special focus on the sheet's vortex generation performance.…”

Section: Effects Of Length Ratiomentioning

confidence: 99%

“…It occurs when the applied load or deformation exceeds a critical threshold, causing the sheet to 'snap' or buckle into a new configuration. The snap-through behaviour of elastic sheets has found applications in various fields, including deployable structures (Bobbert, Janbaz & Zadpoor 2018;Arnouts et al 2019;Yeow et al 2021), robotics (Currier, Lheron & Modarres-Sadeghi 2020;Gorissen et al 2020;Dong et al 2022;Wu et al 2022a), flow control (Gomez, Moulton & Vella 2017;Jiao & Liu 2021;Zhang et al 2022) and energy harvesting devices (Qin et al 2019;Zhou et al 2019;Kim et al 2020;Wang et al 2021Wang et al , 2023. By harnessing the abrupt configuration changes, engineers and researchers can exploit the unique properties and functionalities associated with snap-through behaviour to design innovative and efficient systems.…”

Section: Introductionmentioning

confidence: 99%

“…2020; Wang et al. 2021, 2023). By harnessing the abrupt configuration changes, engineers and researchers can exploit the unique properties and functionalities associated with snap-through behaviour to design innovative and efficient systems.…”

Section: Introductionmentioning

confidence: 99%

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Buckled elastic sheet as a vortex generator in dual channels

Cui,

Wang,

Ren

et al. 2024

J. Fluid Mech.

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This study presents a dual-channel vortex generator (VG) that leverages the snap-through behaviour of flexible sheets. The VG outperforms a similar-sized rigid VG in generating vortices within dual-channel flows while minimizing pressure loss. Numerical simulations using the immersed boundary-lattice Boltzmann method analyse the dynamics and vortex generation performance of the sheet under various system parameters. Two distinct modes are identified for the elastic sheet: a sustained snap-through mode (SSTM) and a dormant mode (DM). The sheet's mode is predominantly influenced by its length ratio (L*), bending stiffness $(K_b^\ast )$ and flow strength, with the mass ratio having a minimal impact. The sheet exhibiting regular SSTM can effectively generate vortices in both channels and the vortex generation performance can be conveniently tuned by altering the sheet's initial buckling (i.e. L*). An increase in $K_b^\ast $ results in a higher critical Reynolds number (Rec) required for mode transition. An increase in L*, however, initially raises Rec and then lowers it, suggesting an optimal length ratio (approximately 0.7 for our considered system) for minimizing the Rec necessary to trigger SSTM. Furthermore, a disparity in the flow strength between channels is found to suppress the snap-through of the sheet; a greater disparity, however, is permissible to induce the SSTM of more compliant sheets. These findings underscore the potential of snap-through behaviour for enhanced flow manipulation in dual-channel systems.

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Section: Resultsmentioning

confidence: 99%