Reactive Flow modeling of the XTX 8004 SWIFT Experiments

A series of pseudo-aquarium experiments were conducted using the extrudable RDX based explosive XTX 8004. These experiments consisted of XTX 8004 charges of varied experimental geometries cured within a polymethylmethacrylate (PMMA) block. Data of interest was collected from a diameter effect study which employed columns of variable charge diameter, and a shock initiation study using the so-called monolithic gap test (MGT) geometry. The experiments were diagnosed using the novel Shock Wave Image Framing Technique (SWIFT) which allows for the characterization of high explosive behavior on detonator length and time scales. Post-processing of the SWIFT images provides data on the shock trajectory while the application of the aquarium analysis provides interface pressures. In this work we will present a quantitative comparison between the XTX 8004 SWIFT experiment data and reactive flow modeling conducted in a LANL arbitrary Lagrangian-Eulerian (ALE) code. Our calculations make use of a recent XTX 8004 calibration of the AWSD (Arrhenius Wescott-Stewart-Davis) reactive flow model and the Davis reactants and products equation.