SDOT: An explicit mesh-free detonation tracking package in 2D and 3D

Abstract

SDOT: an explicit meshless detonation front tracking package is developed at Lawrence Livermore National Laboratory. The new particle-based algorithm solves a set of time-dependent ODEs in a front-normal coordinate rather than the level-set PDE solved in a global coordinate by existing mesh-based detonation front trackers. The new method keeps only front and boundary information at a time-step so has a smaller data space and is more efficient than existing mesh-based methods. The detonation-shock-dynamics (DSD) boundary-angle is explicitly applied by the choice of a boundary-normal coordinate. The front quality is maintained with an equal-distance smoothing method. With the flexibility of a meshless methodology, the new front tracker is capable of dealing with dynamical resolution change at run time, detonation acceleration effect and dead-zone formation in a HE region with an arbitrary boundary geometry.