A novel energy harvest method based on the vortex-induced vibration of a circular cylinder in a confined channel for the self-powered buoy

A novel method to supply power to the buoy including vortex-induced vibration (VIV) system is proposed. The VIV response and energy conversion performance of an elastically mounted circular cylinder placed in a confined channel under a buoy is investigated. Two-dimensional simulations are conducted and the correctness of the numerical model is verified by comparison with experimental data. Four different width channels, 2D, 3D, 4D, and 5D (D is three times cylinder diameter) are considered at flow velocities changes from 0.2 m/s to 1.3 m/s (1.77 × 104