Vortex induced vibrations of a cylinder at low mass ratio

Abstract

We used the Lattice Boltzmann Method (LBM) to study the vortex-induced vibrations of a circular cylinder in an incompressible flow with a restoring force. The cylinder has three degrees of freedom, two for translation and one for rotation. Results with a wide range of relevant parameters are presented in high resolution simulations. The three detected branches in cross-flow amplitudes were related with flow and cylinder’s dynamics in the limit of low mass ratios. The transition regions between these branches were related with regions where several solutions exist depending on the initial conditions, this solution space is increased with the inclusion of the rotational degree of freedom.