Fluidelastic modeling of a weathercock stabilization in a uniform flow

The relaxation dynamics of a weathercock free-to-rotate, in the presence uniform flow, as it aligns with flow direction, is investigated experimentally wind-tunnel. observed to conveniently follow damped harmonic oscillator behavior. At first order, frequency set by aerodynamic coefficients. We show that quasi static approach fails precisely describe and non-stationary corrections are required model dynamics. A strategy introduce added mass, stiffness damping quasi-static approximation, following what usually done context vortex-induced vibrations. second empirical corrections, whose scaling obtained from analysis experimental data. Finally, these two strategies compared we discuss physical interpretations corrections.