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Abstract
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A computational fluid dynamics simulation was performed to analyze the flow-induced vibration (FIV) of an elastically mounted circular cylinder equipped with a flexible splitter plate at a Reynolds number of 150. The study examined a wide range of reduced velocities, ranging from 3 to 20 as well as the flexibility modules. This research aimed to elucidate the influence of reduced velocity on displacement amplitudes drag and lift coefficients, and vortex shedding patterners across a range of mass ratios (mr = 2, 5, and 10) and non-dimensional plate lengths (LP/D = 1, 1.5, and 2). The findings revealed a decrease in cylinder displacement, in both the in-line and cross-flow directions, with increasing mass ratio and plate length. Conversely, augmenting the plate's flexural rigidity led to an increase in cylinder displacement in both directions. A reduction in drag coefficient was observed with increasing flexural rigidity and plate length. Conversely, the lift coefficient increased with these same parameters, particularly at reduced velocities exceeding 10. Moreover, across all investigated cases, the phenomenon of galloping was observed at higher reduced velocities.
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