Development and Validation of a Compressible Multicomponent Reactive Flow Solver based on STREAmS-2.0

This work presents the recent extension of STREAmS-2[1], a GPU-accelerated high-fidelity solver for Direct Numerical Simulations of compressible flows. Initially designed for single-species flows, STREAmS-2 has been enhanced to sup- port multicomponent reacting flows by incorporating advanced diffusion and concentration gradient models. Chemical kinetics are taken into account using explicit and implicit methods with operator splitting. Validation was conducted in two stages: first against lower-dimensional benchmark cases[2] such as a shock tube, reported in Fig.1, then using the well-documented Sandia-A flame[3], widely studied in combustion research[4]. Additionally, as shown in Fig.2, a syngas-air autoigniting jet flame was employed to test weak and strong scaling capabilities, demonstrating the ability of the solver to efficiently utilize GPU-based HPC architectures, ensuring scalability despite the added complexity. This capability is crucial given the increasing computational resources and the emerging potential of exascale computing.