The Role of Viscosity in TATB Hot Spot Ignition

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The role of dissipative effects, such as viscosity, in the ignition of high explosive pores is investigated using a coupled chemical, thermal, and hydrodynamic model. Chemical reactions are tracked with the Cheetah thermochemical code coupled to the ALE3D hydrodynamic code. We perform molecular dynamics simulations to determine the viscosity of liquid TATB. We also analyze shock wave experiments to obtain an estimate for the shock viscosity of TATB. Using the lower bound liquid-like viscosities, we find that the pore collapse is hydrodynamic in nature. Using the upper bound viscosity from shock wave experiments, we find that the pore collapse is ... continued below

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Fried, L E; Zepeda-Ruis, L; Howard, W M; Najjar, F & Reaugh, J E August 2, 2011.

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The role of dissipative effects, such as viscosity, in the ignition of high explosive pores is investigated using a coupled chemical, thermal, and hydrodynamic model. Chemical reactions are tracked with the Cheetah thermochemical code coupled to the ALE3D hydrodynamic code. We perform molecular dynamics simulations to determine the viscosity of liquid TATB. We also analyze shock wave experiments to obtain an estimate for the shock viscosity of TATB. Using the lower bound liquid-like viscosities, we find that the pore collapse is hydrodynamic in nature. Using the upper bound viscosity from shock wave experiments, we find that the pore collapse is closest to the viscous limit.

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PDF-file: 6 pages; size: 1.2 Mbytes

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  • Presented at: 17th APS Shock Compression of Condensed Matter Conference, Chicago, IL, United States, Jun 26 - Jul 01, 2011

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  • Report No.: LLNL-CONF-491839
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1022916
  • Archival Resource Key: ark:/67531/metadc843847

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  • August 2, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Dec. 7, 2016, 8:49 p.m.

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Fried, L E; Zepeda-Ruis, L; Howard, W M; Najjar, F & Reaugh, J E. The Role of Viscosity in TATB Hot Spot Ignition, article, August 2, 2011; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc843847/: accessed May 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.