Thermodynamic Consistency and Monotonicity of Equations of State in Simulated Pulsed- Power-Driven Explosions of Cylindrical Conductors.

Megaampere pulsed-power-driven explosions of conductors are an important area of study for char- acterizing hydrodynamic instabilities relevant to magneto-inertial fusion concepts such as magnetized- liner inertial fusion (MagLIF). Experiments such as the Mykonos electrothermal instability II (METI-II) experiment provide insight on the physics of conductive materials brought from solid conditions to high energy density plasma (HEDP) regimes in less than 0.1 μs. Understanding the rapid phase changes in the conductor is key to understanding the electrothermal instability (ETI). In simulated recreations of these experiments, the proper choice of equations of state (EOS), con- stitutive models, and subsequent careful usage are of critical importance for making consistent comparisons to measurements. This work considers resistive magnetohydrodynamic (MHD) simu- lation results from the Lawrence Livermore National Laboratory (LLNL) code Ares in the analysis of different approaches to monotonic reconstruction of SESAME tabular EOS for aluminum that exhibit van der Waals loops.