title: Low Mass-Damping Vortex-Induced Vibrations of a Single Cylinder at Moderate Reynolds Number.
abstract: The feasibility and accuracy of large eddy simulation is investigated for the case of three-dimensional unsteady flows past an elastically mounted cylinder at moderate Reynolds number. Although these flow problems are unconfined, complex wake flow patterns may be observed depending on the elastic properties of the structure. An iterative procedure is used to solve the structural dynamic equation to be coupled with the Navier-Stokes system formulated in a pseudo-Eulerian way. A moving mesh method is involved to deform the computational domain according to the motion of the fluid structure interface. Numerical simulations of vortex-induced vibrations are performed for a freely vibrating cylinder at Reynolds number 3900 in the subcritical regime under two low mass-damping conditions. A detailed physical analysis is provided for a wide range of reduced velocities, and the typical three-branch response of the amplitude behavior usually reported in the experiments is exhibited and reproduced by numerical simulation.
authors.affiliation: LAMSID , UMR CNRS/EDF/CEA No 2832 , 1 Avenue du Général de Gaulle , Clamart cedex 92141, France ;
authors.forename: Y
authors.initials: Y
authors.lastname: Jus
authors.affiliation: LAMSID , UMR CNRS/EDF/CEA No 2832 , 1 Avenue du Général de Gaulle , Clamart cedex 92141 , France.
authors.forename: E
authors.initials: E
authors.lastname: Longatte
authors.affiliation: UPMC Univ Paris 06 , UMR 7190 , Institut Jean Le Rond d'Alembert , Paris F-75005, France ;
authors.forename: J-C
authors.initials: JC
authors.lastname: Chassaing
authors.affiliation: UPMC Univ Paris 06, UMR 7190, Institut Jean Le Rond d'Alembert , Paris F-75005 , France ; CNRS, UMR 7190 , Institut Jean Le Rond d'Alembert , Paris F-75005 , France.
authors.forename: P
authors.initials: P
authors.lastname: Sagaut
keywords: fluid structure interaction; large eddy simulation; vortex-induced vibrations