A numerical study of shock waves generated through laser ablation of explosives
- Brown Univ., Providence, RI (United States). Dept. of Chemistry
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Lincoln Lab.
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.
- Research Organization:
- Brown Univ., Providence, RI (United States)
- Sponsoring Organization:
- USDOE; US Department of the Navy, Office of Naval Research (ONR)
- Grant/Contract Number:
- sc0001082; N00014-15-MP-00407
- OSTI ID:
- 1465123
- Alternate ID(s):
- OSTI ID: 1332373
- Journal Information:
- Journal of Applied Physics, Vol. 120, Issue 19; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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