A high-order partitioned fluid-structure interaction framework for vortex-induced vibration simulation

Vortex-induced vibration (VIV) is a highly nonlinear fluid-structure interaction (FSI) phenomenon, and its accurate prediction remains challenging. In this study, we developed high-order partitioned FSI framework towards simulation of the VIV phenomenon. The focus on simulating two-way coupled between flexibly mounted rigid body surrounding fluids. framework, computational fluid dynamics method, i.e., flux reconstruction/correction procedure via reconstruction, utilized to simulate unsteady compressible Navier–Stokes equations in arbitrary Lagrangian Eulerian format unstructured moving grids. A linearized fluid-solid Riemann solver employed weakly couple rigid-body interface, which can effectively mitigate so-called added-mass instability. Time marching conducted through either linearly implicit Rosenbrock–Wanner method or explicit strong stability preserving Runge–Kutta method. verified with challenging zero-mass cylinder viscous flows, has been used study two VIV-related problems, namely, energy sink oscillating foil based harvesting mechanism.