A STRONG COUPLING SCHEME FOR FLUID-STRUCTURE INTERACTION PROBLEMS IN VISCOUS INCOMPRESSIBLE FLOWS

Abstract. In the present paper an embedded-boundary formulation that is applicable to fluid structure interaction problems is presented. The Navier-Stokes equations for incom-pressible flow are solved on a fixed grid which is not aligned with the body. A corotational formulation is used to describe the dynamics of a body that moves through the fixed grid undergoing large-angle/large-displacement rigid body motions. A strong coupling scheme is adopted, where the fluid and the structure are treated as elements of a single dynamical system, and all of the governing equations are integrated simultaneously, and interactively in the time-domain. A demonstration of the accuracy and efficiency of the method will be given for a variety of fluid/structure interaction problems.