Implementation and verification of a shock-fitting technique on SU2 code

A shock-fitting methodology for unstructured grids is implemented and verified within the open−source CFD solver SU2. The approach accurately tracks shock surfaces as zero-thickness discontinuities embedded in the computational mesh, eliminating numerical diffusion typically present in shock-capturing methods. The technique is validated through a series of test cases, including inviscid and viscous hypersonic flows, as well as fluid-structure interaction (FSI) simulations involving deformable membranes. Comparisons with analytical solutions and reference data demonstrate improved accuracy, convergence, and robustness compared to traditional shock-capturing approaches.