Multidimensional thermal-chemical cookoff modeling

Conference · Mon Aug 01 00:00:00 EDT 1994

OSTI ID:10171421

Baer, M R; Gross, R J; Gartling, D K; Hobbs, M L

Multidimensional thermal/chemical modeling is an essential step in the development of a predictive capability for cookoff of energetic materials in systems subjected to abnormal thermal environments. COYOTE II is a state-of-the-art two- and three-dimensional finite element code for the solution of heat conduction problems including surface-to-surface thermal radiation heat transfer and decomposition chemistry. Multistep finite rate chemistry is incorporated into COYOTE II using an operator-splitting methodology; rate equations are solved element-by-element with a modified matrix-free stiff solver, CHEMEQ. COYOTE II is purposely designed with a user-oriented input structure compatible with the database, the pre-processing mesh generation, and the post-processing tools for data visualization shared with other engineering analysis codes available at Sandia National Laboratories. As demonstrated in a companion paper, decomposition during cookoff in a confined or semi-confined system leads to significant mechanical behavior. Although mechanical effect are not presently considered in COYOTE II, the formalism for including mechanics in multidimensions is under development.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 10171421
• Report Number(s): SAND-94-1909C; CONF-9408123-2; ON: DE94016555; BR: GB0103012
• Resource Relation: Conference: 1994 joint Army, Navy, NASA, Air Force (JANNAF) propulsion systems hazards meeting,San Diego, CA (United States),1-5 Aug 1994; Other Information: PBD: [1994]
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
CHEMICAL EXPLOSIONS
C CODES
HEAT TRANSFER
HEAT
THERMAL CONDUCTION
DIAGRAMS
T CODES
THERMAL DIFFUSION
X CODES
FINITE ELEMENT METHOD
MESH GENERATION
450100
990200
CHEMICAL EXPLOSIONS AND EXPLOSIVES
MATHEMATICS AND COMPUTERS