A particle level-set based Eulerian method for multi-material detonation simulation of high explosive and metal confinements

作者：Kim Ki Hong; Yoh Jack J^*

来源：Proceedings of the Combustion Institute, 2013, 34(2): 2025-2033.

DOI：10.1016/j.proci.2012.07.010

• Detonation
• Ignition & growth
• High explosive
• Multi-material interaction
• Rate stick

The multi-material numerical simulation for energetic system that consists of a high explosive charge and an inert confinement is carried out with an accurate and state-of-the-art Eulerian method. An explosively driven copper tube results in a state of extreme temperature and pressure, coupled to a high speed structural response of metal due to a detonating high explosive (HE). We use the experimentally tuned Ignition and Growth (or JWL++) rate equation for the HE while the elasto-plastic response of inert is modeled by the Mie-Gruneisen equation of state (EOS) and the Johnson-Cook strength model. A new particle level-set based reactive Ghost Fluid Method (GFM) that imposes exact boundary conditions at the material's interface according to physical restraints is developed to simulate the multi-material detonation problem. Our calculations reproduce the experimental data of both unconfined and confined rate stick problems, suggesting that the method is suitable for detonation simulation of energetic systems.

• 出版日期2013