Adaptive reduced-order modeling for non-linear fluid–structure interaction

We present an adaptive reduced-order model for the efficient time-resolved simulation of fluid–structure interaction problems with complex and non-linear deformations. The is based on repeated linearizations structural balance equations. Upon each linearization step, number unknowns strongly decreased by using modal reduction, which leads to a substantial gain in computational efficiency. Through re-calibration truncation augmentation whenever non-dimensional deformation threshold exceeded, we ensure that reduced basis maintains arbitrary accuracy small large Our novel embedded into partitioned, loosely coupled finite volume–finite element framework, interface motion within Eulerian fluid solver accounted conservative cut-element immersed-boundary method. Applications aeroelastic instability flat plate at supersonic speeds, elastic panel placed shock tube, induced buckling inflated thin semi-sphere demonstrate efficiency