Carbon in Detonation Products. A "Three-Phase" Modelisation

Abstract
Condensed carbon is a common and rather abundant component in reactive mixtures formed in shock compressed energetic materials. However, there still remain some questions about its molecular forms in these mixtures. The choice of an accurate model to be used in high pressure, high temperature simulations is essential to ensure better prediction of energetic substances performances and constitutes a major difficulty. We describe the main theoretical features of a three-phase equation of state used in the thermochemical code CARTE to represent the graphite-diamond-liquid system. Sensitivity of different characteristics (detonation velocity, energy release) to carbon equation of state is investigated for a large range of energetic materials.