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• W4283265108 endingPage "111747" @default.
• W4283265108 startingPage "111747" @default.
• W4283265108 abstract "This work numerically investigates flow-induced vibration (FIV) of two tandem cylinders of unequal diameters at a Reynolds number of 100 and at a range of reduced velocity 2 − 10. Particular attention is paid to assimilating the effects of the cylinder diameter ratio (0.2 − 1) and the cylinder spacing ratio 1.5, 3.5 and 5.5 on vibration responses, frequency responses, lock-in, and wake structure. The cylinder-to-fluid mass ratio is considered as one, and the damping coefficient is set to zero to attain maximum oscillation amplitude. The obtained results reveal that FIV is highly sensitive to both diameter and spacing ratios, and the wake interference involved is intricate. With a decrease in diameter ratio, the upstream cylinder oscillation is affected due to a change in its effective Reynolds number while its wake induces a significant effect on the downstream cylinder. The lowest diameter ratio of 0.2 exhibits a de-energized wake suppressing the oscillation of the downstream cylinder. At a moderate diameter ratio of 0.6, suppressed and excited oscillations of the downstream cylinder are observed at spacing ratios 1.5 and 3.5, respectively. • Flow-induced vibration of two elastically mounted tandem cylinders of unequal diameters. • FIV is highly sensitive to both diameter ratio and spacing ratio. • At moderate diameter ratio, suppressed and excited oscillation of downstream cylinder is observed. • The multiple tubes of unequal diameter in closed proximity wake interference may undergo structural damage." @default.
• W4283265108 created "2022-06-23" @default.
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• W4283265108 date "2022-08-01" @default.
• W4283265108 modified "2023-10-15" @default.
• W4283265108 title "Flow-induced vibration on two tandem cylinders of different diameters and spacing ratios" @default.
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• W4283265108 doi "https://doi.org/10.1016/j.oceaneng.2022.111747" @default.
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