Enabling R&D for accurate simulation of non-ideal explosives.

Aidun, John Bahram ; Thompson, Aidan Patrick ; Schmitt, Robert Gerard

Sandia National Laboratories

关键词: 99 General And Miscellaneous//Mathematics, Computing, And Information Science;    National Security;    Kinetics;    Simulation;    Exploration;   

DOI  :  10.2172/1008115
RP-ID  :  SAND2010-6831
RP-ID  :  AC04-94AL85000
RP-ID  :  1008115

美国|英语

来源: UNT Digital Library

【 摘 要 】

We implemented two numerical simulation capabilities essential to reliably predicting the effect of non-ideal explosives (NXs). To begin to be able to treat the multiple, competing, multi-step reaction paths and slower kinetics of NXs, Sandia's CTH shock physics code was extended to include the TIGER thermochemical equilibrium solver as an in-line routine. To facilitate efficient exploration of reaction pathways that need to be identified for the CTH simulations, we implemented in Sandia's LAMMPS molecular dynamics code the MSST method, which is a reactive molecular dynamics technique for simulating steady shock wave response. Our preliminary demonstrations of these two capabilities serve several purposes: (i) they demonstrate proof-of-principle for our approach; (ii) they provide illustration of the applicability of the new functionality; and (iii) they begin to characterize the use of the new functionality and identify where improvements will be needed for the ultimate capability to meet national security needs. Next steps are discussed.