Simulation of shock initiation in explosives using a model combining high computational efficiency with a free choice of mixture rules
Source abstract
Abstract
Models for shock initiation in explosives must consider how energy transfers from products to reactants. This is based on different energy-apportionment assumptions, which affect the results for shock initiation. This study proposes a robust model of shock initiation in explosives using a free choice of energy-apportionment assumptions. The reacting explosive is treated as a mixture of reactants and products under different energy-apportionment assumptions. The equations of state of the mixture are efficiently solved by refining the Cochran–Chan concept of the real volume fraction and introducing a real energy fraction term. The validity, efficiency, and universality of the proposed model are verified in one-dimensional numerical simulations of the shock initiation of homogeneous (nitromethane) and heterogeneous (PBX 9404) explosives. Compared to the conventional Cochran–Chan and Johnson–Tang–Forest models, the proposed model has a better balance of computational efficiency and universality.
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Research context
OpenAlex topics: Energetic Materials and Combustion · Combustion and Detonation Processes · Thermal and Kinetic Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology 1 , Beijing 100081, P. R. China
Anhui Dongfeng Mechanical and Electrical Technology Co., Ltd. 2 , Hefei 230000, P. R. China
Funding
National Natural Science Foundation of China
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