Detailed Validation of Ejecta Transport Models

Recent experiments performed at Los Alamos National Laboratory have shown that metal particles ejected from a shocked surface show vastly different behavior when the medium they are ejected into is inert or reactive. For particles ejected into an inert medium, the particles appear to breakup in a standard liquid droplet breakup mechanism. However, if the metal particles are ejected into a reactive medium, they exhibit what appears to be delayed break-up behavior where they almost breakup in batches. The physical processes which dictate this phenomenon are mainly unknown and are of interest to those who wish to accurately model the trajectories of the ejecta after they form. This work shows preliminary simulations of the non-reacting ejecta experiment configurations. The simulation results are compared to experimental data to validate the ejecta transport models, such as the mass sourcing and multiphase momentum and energy transfer, which are currently implemented in the hydrocode. The goal is to demonstrate that these models are capable of capturing the details of the inert ejecta experiments and are a suitable starting point for the future modeling of the reactive ejecta phenomena.