Multi-level acceleration with manifold mapping of strongly coupled partitioned fluid-structure interaction

The manifold mapping algorithm is applied to an unsteady flow in a one-dimensional tube, incompressible laminar flow over a fixed cylinder with an attached flexible flap, and a wave propagation in a three-dimensional elastic tube problem. A reduction of approximately 50% in terms of high-fidelity iterations is achieved compared to the state-of-the-art Interface Quasi-Newton Inverse Least Squares algorithm. The convergence of the high-fidelity model is accelerated even further when information from previous time steps is reused.