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Title: A numerical study of shock waves generated through laser ablation of explosives

Shock waves resulting from irradiation of energetic materials with a pulsed ultraviolet laser source have been shown to be an effective indicator for explosives detection. In this study, the features of shock wave propagation are explored theoretically. The initial stage of the shock motion is simulated as a one-dimensional process. As the nonlinear wave expands to form a blast wave, a system of conservation equations, simplified to the Euler equations, is employed to model wave propagation. The Euler equations are solved numerically by the 5th order weighted essentially non-oscillatory finite difference scheme with the time integration carried out using the 3rd order total variation diminishing Runge Kutta method. The numerical results for the shock wave evolution are compared with those obtained from experiments with a meltcast 2,6-dinitrotoluene sample. The calculations lay a theoretical foundation for a recently investigated technique for photoacoustically sensing explosives using a vibrometer.
Authors:
 [1] ; ORCiD logo [1] ;  [2] ;  [2] ;  [2]
  1. Brown Univ., Providence, RI (United States). Dept. of Chemistry
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Lincoln Lab.
Publication Date:
Grant/Contract Number:
sc0001082; N00014-15-MP-00407
Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 120; Journal Issue: 19; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Research Org:
Brown Univ., Providence, RI (United States)
Sponsoring Org:
USDOE; US Department of the Navy, Office of Naval Research (ONR)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; materials properties; acoustic waves; Doppler effect; laser materials; laser ablation; ultraviolet lasers; blast waves; mach numbers
OSTI Identifier:
1465123
Alternate Identifier(s):
OSTI ID: 1332373