Computational simulation of the flow-induced vibration of a circular cylinder subjected to wake interference

In this work, we considered the flow around two circular cylinders of equal diameter placed in tandem with respect to the incident uniform flow. The upstream cylinder was fixed and the downstream cylinder was completely free to move in the cross-stream direction, with no spring or damper attached to it. The centre-to-centre distance between the cylinders was four diameters, and the Reynolds number was varied from 100 to 645. We performed two- and three-dimensional simulations of this flow using a Spectral/hp element method to discretise the flow equations, coupled to a simple Newmark integration routine that solves the equation of the dynamics of the cylinder. The differences of the behaviours observed in the two- and three-dimensional simulations are highlighted and the data is analysed under the light of previously published experimental results obtained for higher Reynolds numbers.

► 2d and 3d simulations of the flow around two circular cylinders of same diameter in tandem performed.
► Upstream cylinder was fixed and downstream cylinder was free to move in the cross-stream direction.
► The centre-to-centre distance between the cylinders was 4D, and the Reynolds number up to 645.
► The differences of the behaviours observed in the 2d and 3d simulations are highlighted.
► The data is analysed under the light of experimental results obtained for higher Reynolds numbers.