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Title: Multiscale Approach to Shock to Detonation Transition in Energetic Materials

Abstract

In this study we present a multiscale approach for coupling the dynamics of void collapse at the microscale to simulations at the mesoscale. We solve the reactive Euler equations, with the energy equation augmented by a power deposition term. The reaction rate at the mesoscale is modelled using a pressure–dependent power law. The deposition term is based on previous simulations of void collapse, modelled at the mesoscale as hot–spots. The equation of state was previously calibrated for PBX 9501. The run–to–detonation distance is calculated as part of the numerical solution procedure. Results for 1–D, 2–D homogeneous, and 2–D heterogeneous medium are presented, and show good agreement to experimental data.

Authors:
 [1];  [2]; ORCiD logo [3]
  1. Univ. of Florida, Gainesville, FL (United States). Dept. of Mechanical and Aerospace Engineering
  2. Florida Inst. of Technology, Melbourne, FL (United States). Dept. of Mechanical and Aerospace Engineering
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1576936
Alternate Identifier(s):
OSTI ID: 1573851
Report Number(s):
LA-UR-19-24883
Journal ID: ISSN 0721-3115
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Propellants, Explosives, Pyrotechnics
Additional Journal Information:
Journal Name: Propellants, Explosives, Pyrotechnics; Journal ID: ISSN 0721-3115
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
multiscale; mesoscale simulations; detonation initation; void collapse; thermal deposition; energetic materials

Citation Formats

Jackson, Thomas L., Zhang, Ju, and Short, Mark. Multiscale Approach to Shock to Detonation Transition in Energetic Materials. United States: N. p., 2019. Web. doi:10.1002/prep.201900179.
Jackson, Thomas L., Zhang, Ju, & Short, Mark. Multiscale Approach to Shock to Detonation Transition in Energetic Materials. United States. doi:10.1002/prep.201900179.
Jackson, Thomas L., Zhang, Ju, and Short, Mark. Mon . "Multiscale Approach to Shock to Detonation Transition in Energetic Materials". United States. doi:10.1002/prep.201900179.
@article{osti_1576936,
title = {Multiscale Approach to Shock to Detonation Transition in Energetic Materials},
author = {Jackson, Thomas L. and Zhang, Ju and Short, Mark},
abstractNote = {In this study we present a multiscale approach for coupling the dynamics of void collapse at the microscale to simulations at the mesoscale. We solve the reactive Euler equations, with the energy equation augmented by a power deposition term. The reaction rate at the mesoscale is modelled using a pressure–dependent power law. The deposition term is based on previous simulations of void collapse, modelled at the mesoscale as hot–spots. The equation of state was previously calibrated for PBX 9501. The run–to–detonation distance is calculated as part of the numerical solution procedure. Results for 1–D, 2–D homogeneous, and 2–D heterogeneous medium are presented, and show good agreement to experimental data.},
doi = {10.1002/prep.201900179},
journal = {Propellants, Explosives, Pyrotechnics},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {11}
}

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