Experimental investigation of a three-dimensional bluff-body wake

The three-dimensional bluff-body wake over two-dimensional circular cylinder geometries is investigated. Experiments are conducted wherein five wavy-cylinder models are subjected to wind-tunnel and water-tunnels tests. The laser-light-sheet techniquw is then employed to obtain two-dimensional slices of the wake generated behind the nodes and saddles of the cylinders. Results reveal that the formation of the trailing vortices is narrowest behind the geometric nodes and widest behind the geometric saddles.