Illuminating the complex role of the added mass during vortex induced vibration

The role of the added mass coefficient in vortex induced vibration (VIV) bluff body is complex and elusive. It certain that decoding relationship between pattern will benefit prediction prevention VIV. We present a study on VIV long flexible cylinder forced rigid cylinder, combination experimental optical measurements high-fidelity numerical simulation. focus uniform flow over at fixed Reynolds number, Red = 900, but systematically varied motion amplitude in-line ( Axd) cross-flow direction Ayd), as well phase angle (θ) motions. show θ∈[π2,3π2] associated with negative coefficients (Cmy < 0), there strong correlation shedding mode “2P” or “P+S” Cmy 0.