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

Date

2014-05-30

Author

Narin, B.
Özyörük, Yusuf
Ulaş, Abdullah

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

115
views

0
downloads

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.

Subject Keywords

Deflagration-to-detonation transition (DDT), Energetic, Solid explosive ingredients, Microscale effects, Time-split approach, Temperature switch

URI

https://hdl.handle.net/11511/47419

Journal

JOURNAL OF HAZARDOUS MATERIALS

DOI

https://doi.org/10.1016/j.jhazmat.2014.03.027

Collections

Department of Aerospace Engineering, Article

Suggestions

OpenMETU
Core

An Iterative Solution Approach to Coupled Heat and Mass Transfer in a Steadily Fed Evaporating Water Droplet Akkus, Yigit; ÇETİN, BARBAROS; Dursunkaya, Zafer (ASME International, 2019-03-01) Inspired by the thermoregulation of mammals via perspiration, cooling strategies utilizing continuously fed evaporating droplets have long been investigated in the field, yet a comprehensive modeling capturing the detailed physics of the internal liquid flow is absent. In this study, an innovative computational model is reported, which solves the governing equations with temperature-dependent thermophysical properties in an iterative manner to handle mass and heat transfer coupling at the surface of a const...
Bivariate Log-Normal Distribution of Stimulated Matrix Permeability and Block Size in Fractured Reservoirs: Proposing New Multilinear-Flow Regime for Transient-State Production Al-Rbeawi, Salam (2018-08-01) This paper investigates the impacts of varied stimulated matrix permeability and matrix-block size on pressure behaviors and flow regimes of hydraulically fractured reservoirs using bivariate log-normal distribution. The main objective is assembling the variance in these two parameters to the analytical models of pressure and pressure derivative considering different porous-media petrophysical properties, reservoir configurations, and hydraulic-fracture (HF) characteristics. The motivation is eliminating th...
Three dimensional computational analysis of fatigue crack propagation in functionally graded materials Sabuncuoglu, Baris; Dağ, Serkan; YILDIRIM, BORA (Elsevier BV, 2012-02-01) This article proposes a new finite elements based three dimensional method developed to study the phenomenon of fatigue crack propagation in functionally graded materials (FGMs). The particular problem examined in detail is that of an initially-elliptical crack located in a functionally graded medium, subjected to mode I cyclic loading. The crack is modelled by employing three dimensional finite elements; and the stress intensity factors (SIFs) around the crack front are computed by the application of the d...
Multiscale Modeling of the Morphology and Properties of Segmented Silicone-Urea Copolymers Yıldırım, Erol; Yurtsever, Ersin; Yilgor, Iskender; Yilgor, Emel (Springer Science and Business Media LLC, 2011-9-9) Molecular dynamics and mesoscale dynamics simulation techniques were used to investigate the effect of hydrogen bonding on the microphase separation, morphology and various physicochemical properties of segmented silicone-urea copolymers. Model silicone-urea copolymers investigated were based on the stoichiometric combinations of alpha,omega-aminopropyl terminated polydimethylsiloxane (PDMS) oligomers with number average molecular weights ranging from 700 to 15,000 g/mole and bis(4-isocyanatocyclohexyl)meth...
A constitutive model for finite deformation of amorphous polymers FLEISCHHAUER, R.; Dal, Hüsnü; KALISKE, M.; SCHNEIDER, K. (2012-12-01) The paper introduces a three-dimensional constitutive model for the mechanical behavior of amorphous polymers, thermosets and thermoplastics. The approach is formulated in terms of finite deformations, appropriate for glassy polymers. The rheology of the model consists of a Langevin-type free energy function for the energy storage due to molecular alignment connected in parallel to a Maxwell element with a viscoplastic dashpot. The model proves successful for the constitutive description of glassy polymers ...

Citation Formats

B. Narin, Y. Özyörük, and A. Ulaş, “Two dimensional numerical prediction of deflagration-to-detonation transition in porous energetic materials,” JOURNAL OF HAZARDOUS MATERIALS, pp. 44–52, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47419.