An Improved Reaction Rate Equation for Simulating the Ignition and Growth of Reaction in High Explosives
We describe an improved reaction rate equation for simulating ignition and growth of reaction in high explosives. It has been implemented into CALE and ALE3D as an alternate to the baseline the Lee-Tarver reactive flow model. The reactive flow model treats the explosive in two phases (unreacted/reactants and reacted/products) with a reaction rate equation to determine the fraction reacted, F. The improved rate equation has fewer parameters, is continuous with continuous derivative, results in a unique set of reaction rate parameters for each explosive while providing the same functionality as the baseline rate equation. The improved rate equation uses a cosine function in the ignition term and a sine function in the growth and completion terms. The improved rate equation is simpler with fewer parameters.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 978397
- Report Number(s):
- LLNL-CONF-425402; TRN: US201010%%70
- Resource Relation:
- Conference: Presented at: 14th International Detonation Symposium, Coeur d'Alene, ID, United States, Apr 11 - Apr 16, 2010
- Country of Publication:
- United States
- Language:
- English
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