Abstract
The interaction between the elastic solid structure and the fluid field it immersed in is of great concern in many areas including wind turbine designing and upper nasal treatments. A new fluid-structure interaction method based on immersed boundary method is developed. Multigrid scheme is applied to trace the interface more accurately. Preliminary validation has been done in a fully developed tube flow model. The result is reasonable in trend, yet has obvious difference from the analytic solution. Advanced research is needed to improve the behavior of the computational program, especially where the two mesh domains transfer information that interacting with Poisson equation solving.