Towards an efficient, high-order, hybrid unstructured and adaptive cartesian mesh approach for external aerodynamics

In this work, we report on the development of an efficient coupling procedure for external aerodynamics applications using a dual solver approach. In the proposed method, the Compressible Navier-Stokes (CNS) equations are solved by using a high-order Flux- Reconstruction method in the vicinity of the geometry and a high-order, finite volume method on block structured grids in the far field region. We focus on the treatment of the interface between the two solvers and study the convergence, accuracy and efficiency of the hybrid method on a single grid hierarchy. Where possible, the the efficacy of the new method is compared with that of using either an unstructured solver in the entire domain or a Cartesian-AMR+IBM solver over the entire domain.