Equation of state and reaction rate for condensed-phase explosives

2005 ◽  
Vol 98 (5) ◽  
pp. 053514 ◽  
Author(s):  
B. L. Wescott ◽  
D. Scott Stewart ◽  
W. C. Davis
Keyword(s):  
Equation Of State ◽  
Condensed Phase ◽  
Reaction Rate ◽  
Condensed Phase Explosives

Asymptotic calculation of the dynamics of self-sustained detonations in condensed phase explosives

2012 ◽  
Vol 710 ◽  
pp. 166-194 ◽  
Author(s):  
J. A. Saenz ◽  
B. D. Taylor ◽  
D. S. Stewart
Keyword(s):  
Equation Of State ◽  
Euler Equations ◽  
Condensed Phase ◽  
Asymptotic Relation ◽  
Single Step ◽  
Detonation Waves ◽  
Normal Velocity ◽  
Exothermic Chemical Reaction ◽  
Detonation Shock ◽  
Condensed Phase Explosives

AbstractWe use the weak-curvature, slow-time asymptotics of detonation shock dynamics (DSD) to calculate an intrinsic relation between the normal acceleration, the normal velocity and the curvature of a lead detonation shock for self-sustained detonation waves in condensed phase explosives. The formulation uses the compressible Euler equations for an explosive that is described by a general equation of state with multiple reaction progress variables. The results extend an earlier asymptotic theory for a polytropic equation of state and a single-step reaction rate model discussed by Kasimov (Theory of instability and nonlinear evolution of self-sustained detonation waves. PhD thesis, University of Illinois Urbana-Champaign, Urbana, Illinois) and by Kasimov & Stewart (Phys. Fluids, vol. 16, 2004, pp. 3566–3578). The asymptotic relation is used to study the dynamics of ignition events in solid explosive PBX-9501 and in porous PETN powders. In the case of porous or powdered explosives, two composition variables are used to represent the extent of exothermic chemical reaction and endothermic compaction. Predictions of the asymptotic formulation are compared against those of alternative DSD calculations and against shock-fitted direct numerical simulations of the reactive Euler equations.

scholarly journals A complete equation of state for non-ideal condensed phase explosives

2017 ◽  
Vol 122 (22) ◽  
pp. 225112 ◽  
Author(s):  
S. D. Wilkinson ◽  
M. Braithwaite ◽  
N. Nikiforakis ◽  
L. Michael
Keyword(s):  
Equation Of State ◽  
Condensed Phase ◽  
Condensed Phase Explosives

Well‐Posed Equations of States for Condensed‐Phase Explosives

2019 ◽  
Vol 45 (3) ◽  
pp. 374-386 ◽  
Author(s):  
Kibaek Lee ◽  
Alberto M. Hernández ◽  
D. Scott Stewart
Keyword(s):  
Condensed Phase ◽  
Condensed Phase Explosives ◽  
Well Posed

A Mechanical Equation of State for Inelastic Deformation of Iron: An Analytic Description

1977 ◽  
Vol 99 (1) ◽  
pp. 59-64 ◽  
Author(s):  
R. W. Rohde ◽  
J. C. Swearengen
Keyword(s):  
Equation Of State ◽  
Stress Relaxation ◽  
Power Law ◽  
Reaction Rate ◽  
Equations Of State ◽  
Analytic Description ◽  
Rate Theory ◽  
Predictive Capability ◽  
Reaction Rate Theory ◽  
The Relationship

The applicability of two familiar analytic descriptions of micromechanical deformation as equations of state for polycrystalline iron is discussed. These equations are the power law and the relationship based on reaction rate theory. It is shown that the reaction rate description fails to describe adequately individual stress relaxation events without invoking undue complexity from use of adjustable parameters. Moreover, even in that case, this formulation lacks the predictive capability required in an equation of state. Conversely, the power law is found not only to describe stress relaxation data properly but also to provide the capability of predicting stress relaxation following initial deformation by different loading paths. It thus appears to represent an equation of state for the material.

scholarly journals Two-flavor chiral perturbation theory at nonzero isospin: pion condensation at zero temperature

2019 ◽  
Vol 79 (10) ◽  
Author(s):  
Prabal Adhikari ◽  
Jens O. Andersen ◽  
Patrick Kneschke
Keyword(s):  
Perturbation Theory ◽  
Equation Of State ◽  
Condensed Phase ◽  
Chiral Perturbation Theory ◽  
Chemical Potential ◽  
Tree Level ◽  
Zero Temperature ◽  
Leading Order ◽  
Chiral Perturbation ◽  
Pion Condensation

Abstract In this paper, we calculate the equation of state of two-flavor finite isospin chiral perturbation theory at next-to-leading order in the pion-condensed phase at zero temperature. We show that the transition from the vacuum phase to a Bose-condensed phase is of second order. While the tree-level result has been known for some time, surprisingly quantum effects have not yet been incorporated into the equation of state.  We find that the corrections to the quantities we compute, namely the isospin density, pressure, and equation of state, increase with increasing isospin chemical potential. We compare our results to recent lattice simulations of 2 + 1 flavor QCD with physical quark masses. The agreement with the lattice results is generally good and improves somewhat as we go from leading order to next-to-leading order in $$\chi $$χPT.

An Eulerian algorithm for coupled simulations of elastoplastic-solids and condensed-phase explosives

2013 ◽  
Vol 252 ◽  
pp. 163-194 ◽  
Author(s):  
Stefan Schoch ◽  
Kevin Nordin-Bates ◽  
Nikolaos Nikiforakis
Keyword(s):  
Condensed Phase ◽  
Condensed Phase Explosives

Detection of condensed-phase explosives via laser-induced vaporization, photodissociation, and resonant excitation

2008 ◽  
Vol 47 (31) ◽  
pp. 5767 ◽  
Author(s):  
C. M. Wynn ◽  
S. Palmacci ◽  
R. R. Kunz ◽  
K. Clow ◽  
M. Rothschild
Keyword(s):  
Condensed Phase ◽  
Resonant Excitation ◽  
Condensed Phase Explosives
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