Two-degree-of-freedom flow-induced vibration of two circular cylinders with constraint for different arrangements

Abstract The flow-induced vibrations (FIV) in two degrees of freedom for two circular cylinders with three arrangements including parallel, tandem, and stagger were investigated numerically, the rigid constraint is considered due to its widespread in industry fields. The effects of arrangement and constraint on FIV characteristics, including trajectory, vibration response, force response, and near wake structure, are analyzed. Results indicate that the existence of constraint can significantly suppress the vibration of the two cylinders when reduced velocity U*