Flow-induced vibration of a circular cylinder with an attached elastic plate of high aspect ratio

The flow-induced transverse vibration of a cylinder (diameter [Formula: see text]) with an attached flexible and elastic plate high aspect ratio to its leeward side is investigated numerically at low Reynolds number 150 for range reduced velocities ( U r ) using in-house developed fluid solver based on curvilinear immersed boundary method strongly coupled open-source finite element-based structural solver. It was observed that width text] length suppresses large vibrations the cylinder, but one L = 2, contrary previous studies, amplifies up five times isolated cylinder. Three regimes were observed: vortex-induced (VIV), suppression, galloping. In VIV regime text], lock-in where vortex shedding frequency from plate-cylinder system seen slightly increase relative static cylinder–plate match natural plate. this regime, deformations (max. 91% L) in modes (up fifth mode), leading new patterns. displacement found reach nearly twice regime. For pushed into suppression wherein nullified because lack vorticity interaction out-of-phase deformation. Beyond 9, vibrated galloping it shed generated forces as asymmetric body creating angle attack incoming flow. primary mode deformation progressively increased second third showed linear velocity until 18. amplitude higher more intense (higher mode) New patterns ranging 2 S till T including all pattern between them like S, P, Q, P + modes, which are reported first time.