title: Laminar, cellular, transverse, and multiheaded pulsating detonations in condensed phase energetic materials from molecular dynamics simulations.
abstract: The development of condensed-phase detonation instabilities is simulated using moving window molecular dynamics and a generic AB model of a high explosive. It is found that an initially planar detonation front with one-dimensional flow can become unstable through development of transverse perturbations resulting in highly inhomogeneous and complex two- and three-dimensional distributions of pressure and other variables within the detonation front. Chemical reactions are initiated in localized transverse shock fronts and Mach stems with a pressure and temperature higher than those predicted by classic Zel'dovich, von Neumann, and Doering detonation theory. The two-dimensional cellular and transverse and three-dimensional pulsating detonation structures are found by varying the physico-chemical properties of AB energetic material, sample geometry, and boundary conditions. The different regimes of condensed-phase detonation that can develop from instabilities within a planar detonation front exhibit structures, although at a much smaller scale, that are similar to those observed in gases and diluted liquids.
authors.affiliation: University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620-5700, USA.
authors.forename: Vasily V
authors.initials: VV
authors.lastname: Zhakhovsky
authors.affiliation: University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620-5700, USA.
authors.forename: Mikalai M
authors.initials: MM
authors.lastname: Budzevich
authors.affiliation: University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620-5700, USA.
authors.forename: Aaron C
authors.initials: AC
authors.lastname: Landerville
authors.affiliation: University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620-5700, USA.
authors.forename: Ivan I
authors.initials: II
authors.lastname: Oleynik
authors.affiliation: Naval Research Laboratory, Washington DC 20375-5320, USA.
authors.forename: Carter T
authors.initials: CT
authors.lastname: White
mesh_terms: D005107:Explosions; D053834:Explosive Agents / Q000737:chemistry*; D056004:Molecular Dynamics Simulation; D013696:Temperature
chemical_list: D053834:Explosive Agents