Analysis of hydrodynamics loads around 2D shapes

The hydrodynamic flow around three given profiles has been studied with a series of two-dimensional simulations performed at three advancing speeds, namely 5, 10 and 12 kn. Particular attention has been paid in capturing the vortex shedding phenomenon. The hydrodynamic performances in terms of drag and lift coefficients, as well as the Strouhal number, have been computed through numerical simulations of the turbulent flow around the profiles, using an unsteady Reynolds Averaged Navier-Stokes (uRaNS) numerical code, developed at CNR-INSEAN. The Chimera approach has allowed to exploit the overlapping grid approach, which ensures a correct evaluation of the near field, as well as of the wake evolution. The validation of the approach has been carried out through the study of the turbulent flow around a circular cylinder and the comparisons with experiments and other available numerical simulations.