Fluid-Structure Interaction Modeling with Nonmatching Interface Discretizations for Compressible Flow Problems: Computational Framework and Validation Study

This work presents a strongly-coupled fluid-structure interaction (FSI) formulation for compressible flows that is developed based on an augmented Lagrangian approach. The method is suitable for handling problems that involve nonmatching fluid-structure interface discretizations. In this work, the fluid is modeled using a stabilized finite element method for the Navier-Stokes equations of compressible flows and is coupled to the structure, which is formulated using isogeometric Kirchhoff-Love shells. The strongly-coupled system is solved using a block-iterative approach. The proposed method is validated using two compressible flow benchmark problems to assess the accuracy of the developed formulation.