blastFoam | Deflagration to Detonation (DDT) Simulation

Inspired by recent experimental work by Lawrence Livermore National Laboratory (LLNL) this blastFoam case simulates a simple deflagration to detonation (DDT) experiment based on the work of Ettner et al. (2014) at the Technical University of Munich. The model works on relatively coarse grids and shows good agreement with experiments by resolving critical aspects of the flow: 1) correct turbulent burning rates, 2) local density increase due to shocks, and 3) potential for shock induced detonation. Simulation: flammable hydrogen-air mixture in a closed rectangular channel of L = , W = 300mm, and H = 60mm, with 12mm thick flat plate obstacles, spaced at 300mm. blastFoam is a free and open-source solver for multi-component compressible flow, based on the five-equation model, with application to high-explosive detonation, explosive safety and airblast. The solver has been validated through the use of experimental data from laboratory, scaled, and full-scale tests. Recent work has focused on validation for e