Visualizing Energy on Target: Molecular Dynamics Simulations

Report No. ARL-TR-8234
Authors: DeCarlos E Taylor
Date/Pages: December 2017; 30 pages
Abstract: In this work, using atomistic molecular dynamics simulation, the mechanism of energy deposition by a shocked diatomic gas into a stationary target is studied as a function of multiple variables including gas density, impact velocity, and target rigidity. The work focuses on the resulting gas dynamics and details the partitioning of the energy among the available rotational and vibrational channels as a function of impact condition. The results suggest that rotational excitations are important at all impact velocities and that vibrational excitation in the gas is only important for high-velocity impacts. The results also suggest that the rate of energy deposition into the vibrational channels of the gas is a function of the density.
Distribution: Approved for public release
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Last Update / Reviewed: December 1, 2017