Coupled Analysis between Incompressible-Unsteady Flow and Perfect Elastic Body with the Loosely Coupling Method.

Abstract

This paper describes an algorithm and its application of a coupled fluid/structure (CFS) problem on an incompressible unsteady flow and a perfect elastic body in a manner of the loosely coupling. The present method proceeds with exchanging the data between the fluid analysis and the elastic analysis. Here, we examined a two dimensional elastic circular cylinder in the uniform flow as an example of CFS problem and compared the deformation of surface of circular cylinder and the influence of the flow drag due to elasticity with those of the rigid body. Our result indicate that the loosely coupling method is effective for the problem between the incompsressible unsteady flow and the perfect elastic body and furthermore confirmed that the drag reduction can be achieved due to the interaction between fluid and elastic body.