Unsteady vortex structure in the wake behind bluff body was experimentally investigated by wind tunnel experiment. A flexible rectangular plate. which was made of a soft polyurethane block. shows the sway motion and flow-induced vibration caused by fluid force. https://www.bekindtopets.com/discount-Ancient-Roman-Gladiator-Murmillo-Cassis-Crista-Helmet-With-Medieval-Style-Skullcap-Nasal-Helmets-With-Nose-Guard-3-Re-big-savings/