Two dimensional numerical prediction of deflagration-to-detonation transition in porous energetic materials


JOURNAL OF HAZARDOUS MATERIALS, vol.273, pp.44-52, 2014 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 273
  • Publication Date: 2014
  • Doi Number: 10.1016/j.jhazmat.2014.03.027
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.44-52
  • Keywords: Deflagration-to-detonation transition (DDT), Energetic, Solid explosive ingredients, Microscale effects, Time-split approach, Temperature switch, DISSIPATIVE EXPLICIT SCHEMES, 2-PHASE DETONATION, HIGH-ORDER, EQUATIONS, MODEL
  • Middle East Technical University Affiliated: Yes


This paper describes a two-dimensional code developed for analyzing two-phase deflagration-to-detonation transition (DDT) phenomenon in granular, energetic, solid, explosive ingredients. The two-dimensional model is constructed in full two-phase, and based on a highly coupled system of partial differential equations involving basic flow conservation equations and some constitutive relations borrowed from some one-dimensional studies that appeared in open literature. The whole system is solved using an optimized high-order accurate, explicit, central-difference scheme with selective-filtering/shock capturing (SF-SC) technique, to augment central-diffencing and prevent excessive dispersion. The sources of the equations describing particle-gas interactions in terms of momentum and energy transfers make the equation system quite stiff, and hence its explicit integration difficult. To ease the difficulties, a time-split approach is used allowing higher time steps. In the paper, the physical model for the sources of the equation system is given for a typical explosive, and several numerical calculations are carried out to assess the developed code. Microscale intergranular and/or intragranular effects including pore collapse, sublimation, pyrolysis, etc. are not taken into account for ignition and growth, and a basic temperature switch is applied in calculations to control ignition in the explosive domain. Results for one-dimensional DDT phenomenon are in good agreement with experimental and computational results available in literature. A typical shaped-charge wave-shaper case study is also performed to test the two-dimensional features of the code and it is observed that results are in good agreement with those of commercial software. (C) 2014 Elsevier B.V. All rights reserved.