Towards Exascale Simulations of Carbon-Free Combustion Systems

Recent advances in computational power, particularly the transition to GPU-based HPC systems, have allowed for larger and more complex combustion system simulations. It is now possible to run simulations at higher, and more technically relevant, Reynolds numbers, pressures and temperatures. This enables the direct numerical simulation of experiments at relevant laboratory conditions. Here, the capability of the reacting flow solver PeleLMeX, developed under the US Department of Energy's Exascale Computing Project (ECP), is demonstrated on the early access module (JEDI) of the exascale machine JUPITER and the pre-exascale JUWELS Booster and Cluster machines. A series of simulations is also presented to demonstrate some of the physics that can be explored using PeleLMeX.