The FLASH Code for Computational High-Energy-Density Physics: Recent Additions and Improvements

FLASH is a publicly available, finite-volume Eulerian, spatially adaptive radiation-magnetohydrodynamic (MHD) code that has the capabilities to treat a broad range of physical processes. FLASH is being developed by the Flash Center for Computational Science to perform well on a wide range of computer architectures and serve a broad user base spanning numerous research communities. Extensive high-energy-density–physics (HEDP) capabilities exist in FLASH, making it a powerful open toolset. We summarize these capabilities, emphasizing on recent additions. We describe several algorithmic improvements and several extended-MHD capabilities that were added to FLASH, allowing modeling of Z pinch, fusion, and magnetized HEDP experiments. We showcase FLASH’s ability to simulate ab initio complex laboratory astrophysics experiments performed by the Turbulent Dynamo collaboration and describe several collaborative efforts with the academic HEDP community, the national laboratories, and industry in which FLASH simulations were used to design and interpret HEDP experiments. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Numbers DE-NA0003856, DE-NA0002724, DE-NA0003605, DE-NA0003842, DE-NA0003934, and Subcontracts 536203 and 630138 with LANL and B632670 with LLNL; the NSF under Award PHY-2033925; the U.S. DOE Office of Science Fusion Energy Sciences under Award DE-SC0021990; and U.S. DOE ARPA-E under Award DE-AR0001272.