Accession Number : AD1043578


Title :   Visualizing Energy on Target: Molecular Dynamics Simulations


Descriptive Note : Technical Report,01 Oct 2015,30 Sep 2016


Corporate Author : US Army Research Laboratory Adelphi United States


Personal Author(s) : Taylor,DeCarlos E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1043578.pdf


Report Date : 01 Dec 2017


Pagination or Media Count : 30


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.


Descriptors :   MOLECULAR DYNAMICS SIMULATIONS , gas dynamics , energy transfer , excitation , velocity , chemical reactions , ionizatoin


Subject Categories : Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE