Determination of the Lighting Radius for Application of Detonation Shock Dynamics Consistent with Ignition Transients in Condensed Explosives
ILLINOIS UNIV AT URBANA COLL OF ENGINEERING
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Three-dimensional simulation of detonation shock motion in a condensed explosive, modeled with a reactive flow in a moderately complex geometry can require enormous amounts of computer time, since the reaction zone behind the leading shock is extremely thin compared to the overall dimensions of the computational domain. Therefore algorithms such as program burn, pre-compute the detonation shock arrival time, and then essentially use a delta function model to release the heat of detonation into few computations cells near the shock wave. Previous validation efforts that use a program burn algorithm based on detonation shock dynamics DSD highlighted the prescription of the initial detonation shock for the simulation, in a manner that is self-consistent with the theory and physical experiment. In this paper, we use a combination of theory, direct multi-material simulation and experiment to determine a critical radius for the starting detonation shock shape.
- Fluid Mechanics
- Numerical Mathematics
- Ammunition and Explosives