Comparisons of Explosive Dispersal of High-Volume Fraction Particle Beds in Static and Supersonic Conditions

Explosive dispersal is a rich and challenging topic of research in the multiphase flow community. Curious questions arise when comparing explosive dispersal in different environments such as static and supersonic regimes. We simulate an explosive dispersal of a high-volume fraction particle bed in static, Mach 3 and 6 ambient conditions. This is done using an Eulerian-Lagrangian finite volume code. The geometry of the explosive dispersal is simulated in an axisymmetric barrel with an exit into ambient conditions. A reactive burn model was used to provide the initial conditions of the explosive with the particle bed in between the explosive and the barrel exit. The non-static conditions were setup with a startup simulation that allowed a bow shock to form over the barrel before the explosive and particle bed are released. Flow and particle metrics were captured using three virtual probe plates in three different locations downstream of the barrel exit. These plates capture the incipient flow properties at various times throughout the simulation as they do not interfere with the flow.