• circular
• cylinder
• large-eddy
• multi-scale
• simulation
• simulations
• variational

The aim of the present work is to validate and investigate the behaviour of a Variational Multiscale formulation (VMS) in the Large Eddy Simulation (LES) of the flow around a circular cylinder at Reynolds number, based on the free-stream velocity and on the diameter, equal to 3900.

Simulations are carried out with three different eddy-viscosity closure models. Furthermore, the effect of grid resolution investigated, by using two different grid: a coarser grid of about 2.9*10^5 nodes and a finer one with approximately 1.13*10^6 nodes.

For all simulations comparisons with the experimental data and with the results of the other LES in the letterature are provided.