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- W2942510132 abstract "Abstract The induced flow and the dynamics of flexible plates under heaving characterized by impulsive acceleration patterns Π ( t ) were experimentally inspected for various Cauchy numbers C a and fractions τ a of the time under acceleration with respect to the period of oscillations T . Simultaneous measurements of the plate motion along their span and the surrounding flow were obtained with particle tracking velocimetry (PTV) and particle image velocimetry (PIV). The Π ( t ) function was imposed at the root of a low-aspect-ratio plate vertically submerged in a quiescent water tank. Results show that C a and τ a significantly modulated the plate dynamics as well as the induced flow and coherent motions. We developed a simple model to estimate the velocity difference Δ u between the root and tip of the plates; it is based on the damped harmonic oscillator and exhibits good performance across the fifteen scenarios inspected (three C a by five τ a ). In general, the plate dynamics and flow exhibited three distinctive patterns characterized by flapping-like motions, translation-like motions and another intermediate state. The type of motion was induced by the relative instant at the reverse direction within the forced Π ( t ) -heaving within one of three characteristic stages; two of them depending on the sign of Δ u and the other when Δ u → 0 , i.e., in the limit of pure translation." @default.
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- W2942510132 date "2019-05-01" @default.
- W2942510132 modified "2023-09-24" @default.
- W2942510132 title "Dynamics of flexible plates and flow under impulsive oscillation" @default.
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- W2942510132 doi "https://doi.org/10.1016/j.jfluidstructs.2019.03.014" @default.
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