Investigation of the branching behaviour of a freely vibrating circular cylinder at low Reynolds numbers
Published: 4 October 2021| Version 1 | DOI: 10.17632/9gh3g9c4d4.1
In this study fluid flow around a freely vibrating cylinder is analyzed using an in-house code based on the finite difference method. Mass ratios between m* = 2 and 150 are considered, the Reynolds number is fixed at Re = 300 and the reduced velocity is varied from U* = 2.5 to 7.5. The results indicated that an amplitude increment observed in the lower end of the lock-in domain corresponds to the upper branch, which has not been found before for low-Reynolds number flows. In the upper branch P+S asymmetric vortex structure was observed while in the initial and lower branches 2S wake mode formed which agree with the data in the literature.
Fluid Dynamics, Hydrodynamics, Computational Fluid Dynamics, Vortex Induced Vibration, Fluid-Structure Interaction (Hydrodynamics)