The flow around a cylindrical body may be subjected to separation, leading to the formation of two free shear layers and periodic vortex-shedding. In the problem of an elastic structure, the vortex-shedding frequency may be close to the one of the Eigen frequencies, defining the vortex-induced vibration (VIV) phenomenon. This phenomenon is of great interest on risers dynamics and presents maximum oscillation amplitudes close to one diameter and occurs on a specific range of free-stream velocities. Usually, it is interesting to suppress the VIV due to the structural fatigue of risers. However, the self-excited character of VIV motivated efforts aiming at the energy harvesting for low power equipment. Another source of clean energy is the use of piezoelectric materials in oscillating structures, which associate mechanical strain to voltage. The objective of this research project is to employ the phenomenological models for VIV jointly with constitutive equations of piezoelectric materials in order to simulate the energy harvesting.
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