Abstract
We present numerical results for hydrodynamic vibrations of an upstream circular cylinder in tandem arrangement which is mounted in a uniform flow. Two circular cylinders are assumed as each rigid body, and the upstream circular cylinder is supported by damper-spring systems in in-line and cross-flow directions. In our computations, the gap ratios of two kinds between the centers of two circular cylinders are taken into consideration and they are given as 2 and 3 which are smaller than the critical gap ratio. In addition, the Scruton number is set as 0.99. Vibration amplitudes in the in-line and cross-flow directions of the upstream circular cylinder are computed by a third-order upwind finite element scheme and the numerical results are discussed in detail.
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