Aerospace Colloquium

Lawrence Livermore National Laboratory (LLNL) is developing next generation simulation capabilities for exascale computing systems as part of the Multiphysics on Advanced Platforms Project (MAPP). One of the key outcomes of this project is MARBL, an arbitrary Lagrangian-Eulerian (ALE) multiphysics code that utilizes high-order finite element discretizations. In this presentation, we will discuss the finite element methods created for ALE multiphysics, with a focus on "matrix-free" partial assembly techniques that allow for scalable and GPU-efficient computation of high-order finite element operators. We will also outline the multiphysics capabilities of MARBL and its applications in modeling inertial confinement fusion (ICF) and high-energy density physics (HEDP) experiments, including large-scale GPU simulations on the El Capitan supercomputer. Additionally, we will cover recent work applying MARBL to astrophysics simulations and conclude with our vision for the future centered on the development of differentiable multiphysics codes.