- Conference date: 26 June–1 July 2011
- Location: Chicago, Illinois
The structure of a steady detonation wave in solid energetic materials (EMs) represented by the standard AB model was studied using molecular dynamics (MD) simulations. Parameters of the AB model were modified to investigate the mechanism of detonation propagation in EMs as a function of the barrier height for the chemical reaction AB+B→A+BB+3 eV. For barriers below 0.2 eV, the detonation front remained planar and material flow was laminar regardless of the cross-sectional size of the AB solid. For higher barriers, the one-dimensional planar detonation became unstable to longitudinal perturbations leading to collapse of the detonation wave in an AB sample having a relatively small cross-section. Upon extension of one transverse dimension, the unstable planar detonation front was initially transformed into a quasi-stable, two-dimensional cellular front that later developed into a stable spin detonation containing local oblique shock waves propagating within the detonation front. The extension of the second transverse dimension resulted in an unstable planar detonation front, which eventually evolves into a stable threedimensional turbulent detonation. Various regimes of detonation observed in our MD simulations mirror the major regimes of detonation in gases, thus confirming the universal nature of detonation phenomena.
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