DOI: 10.1615/TSFP3
DIRECT NUMERICAL SIMULATION OF FLOW ACROSS A COMPLIANT BLUFF BODY
RESUMO
A direct numerical simulation (DNS) code is constructed for solving flow across a three-dimensional deformable bluff body. In the present study, DNS of flow across rigid and compliant cylinders is performed to evaluate the code and the drag reduction effect with a compliant surface. The Strouhal number of shedding of the Karman vortex is calculated and it agrees well with that reported in the literature. Several cases changing the material properties of modelled compliant surface are calculated. It is shown that although the pressure drag is increased, the friction drag is reduced with compliant surface. This fact indicates that a compliant surface can be applied as a drag reduction device in friction drag dominant flows, such as flow around a huge ship.