Aerodynamic characteristics of rectangular cylinders

Three and two-dimensional simulations of unsteady flows around a rectangula r cylinder sectioned object are carried out by means of the IBTD + FS Finit e Element technique without the use of a turbulence model. The three-dimens ional simulations confirmed that the aerodynamic characteristics of a recta ngular object with a side ratio of breadth/ depth (B/D) of 4.0 are in good agreement with the experimental result. We have succeeded in simulating the detailed behavior of the shear layer and the vortex motions around a recta ngular sectioned object. The relationship between the structure and aerodyn amics of rectangular sectioned objects is also investigated.