DIFFERENT ATTITUDES TO SIMULATION OF SLOW COOK-OFF EXPERIMENTS

Document Type : Original Article

Authors

Institute of Energetic Materials, Faculty of Chemical Technology,University of Pardubice, CZ-532 10 Pardubice, Czech Republic.

Abstract

Abstract:
Heat transfer during the slow cook-off test of PBX was successfully simulated using three computational codes. LS-DYNA and COMSOL Multiphysics are both 3D multipurpose commercial codes based on the finite element method. The simplified 1D simulation was carried out using GNU/Octave and the finite difference method. The codes, their applicability for the modeled problem, advantages and disadvantages are discussed and evaluated. The results were compared to the experimental slow cook-off test of Semtex 1A (czech PETN based putty-plastic explosive) and with the critical temperature according to the Frank-Kamenetskii theory. The best agreement between the simulated and experimental value of the ignition temperature was obtained using GNU/Octave script, but COMSOL Multiphysics seems to be better choice due to its accessibility and advantages in this particular case.

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