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Title: Fluid dynamic modeling of nano-thermite reactions

This paper presents a direct numerical method based on gas dynamic equations to predict pressure evolution during the discharge of nanoenergetic materials. The direct numerical method provides for modeling reflections of the shock waves from the reactor walls that generates pressure-time fluctuations. The results of gas pressure prediction are consistent with the experimental evidence and estimates based on the self-similar solution. Artificial viscosity provides sufficient smoothing of shock wave discontinuity for the numerical procedure. The direct numerical method is more computationally demanding and flexible than self-similar solution, in particular it allows study of a shock wave in its early stage of reaction and allows the investigation of “slower” reactions, which may produce weaker shock waves. Moreover, numerical results indicate that peak pressure is not very sensitive to initial density and reaction time, providing that all the material reacts well before the shock wave arrives at the end of the reactor.
Authors:
 [1] ;  [2] ; ;  [3]
  1. Department of Physics and Astronomy, University of Texas, Brownsville, 80 Fort Brown, Brownsville, Texas 78520 (United States)
  2. Rutgers University, 110 Frelinghusen Road, Piscataway, New Jersey 08854-8019 (United States)
  3. Air Force Research Laboratory, Munitions Directorate, 2306 Perimeter Road, Eglin AFB, Florida 32542 (United States)
Publication Date:
OSTI Identifier:
22277887
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPUTERIZED SIMULATION; DENSITY; DIFFERENTIAL EQUATIONS; FLUCTUATIONS; FLUID MECHANICS; MATHEMATICAL SOLUTIONS; REFLECTION; SHOCK WAVES; VISCOSITY