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Multiscale Approach to Shock to Detonation Transition in Energetic Materials
Author(s) -
Jackson Thomas L.,
Zhang Ju,
Short Mark
Publication year - 2020
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.201900179
Subject(s) - mesoscale meteorology , microscale chemistry , detonation , void (composites) , mechanics , shock (circulatory) , euler equations , equation of state , physics , shock wave , materials science , statistical physics , classical mechanics , thermodynamics , mathematics , meteorology , chemistry , composite material , medicine , mathematics education , organic chemistry , explosive material
In this work we present a multiscale approach for coupling the dynamics of void collapse at the microscale to simulations at the mesoscale. We solve the reactive Euler equations, with the energy equation augmented by a power deposition term. The reaction rate at the mesoscale is modelled using a pressure‐dependent power law. The deposition term is based on previous simulations of void collapse, modelled at the mesoscale as hot‐spots. The equation of state was previously calibrated for PBX 9501. The run‐to‐detonation distance is calculated as part of the numerical solution procedure. Results for 1‐D, 2‐D homogeneous, and 2‐D heterogeneous medium are presented, and show good agreement to experimental data.