HOME    »    PROGRAMS/ACTIVITIES    »    Annual Thematic Program
Fall 1999
IMA Workshop
HIGH-SPEED COMBUSTION IN GASEOUS AND CONDENSED-PHASE ENERGETIC MATERIALS
November 8-12, 1999


Organizers:

D. Scott Stewart
University of Illinois-Urbana Champaign
dss@uiuc.edu

Ashwani K. Kapila
Rensselaer Polytechnic Institute
kapila@rpi.edu


High-speed combustion of gaseous reactants displays a variety of phenomena, including flame acceleration, deflagration-to-detonation transition (DDT), detonation instability, and quenching. The equations of reactive gasdynamics provide a reasonable model for a study of these phenomena. The state of affairs is far from satisfactory for condensed-phase explosives, however. The range of observed behavior is substantially broader for this class of materials, especially when these are in a granular or porous form. Deflagrations can travel at elevated speeds, the materials are more sensitive to applied stimuli, and there is an increased propensity for DDT. The mechanical response of the material is richer, and it couples strongly with the confinement, the chemistry, and the energetics to determine the course of combustion.

The recognition that porosity may appear unintentionally (through degradation over time or through accidental damage), and lead to unexpected behavior, has lent some urgency to the need for improved quantitative understanding of the manner in which energetic materials combust. Considerations of safety demand, in particular, the capacity to identify the mechanical or thermal loadings that will, or will not, lead to a detonation.

When a detonation IS the desired goal, there is the need to determine, precisely and economically, the locus of the detonation front, especially as it negotiates corners and obstacles, or propagates through ducts of varying cross section.

This workshop will bring together experimental scientists, theorists currently developing continuum, micromechanical as well as molecular models, applied mathematicians exploring the structure and properties of the models, as well as experts devising and implementing appropriate computational strategies. The aim is to describe current approaches, identify recent successes, and highlight the challenges that remain in the general area of combustion of energetic materials.

Although the main emphasis will be on the condensed phase, issues relating to high-speed combustion in gaseous materials will receive attention as well.

WORKSHOP SCHEDULE

All talks are in Lecture Hall EE/CS 3-180 unless otherwise noted.
Monday Tuesday Wednesday Thursday Friday

MONDAY, NOVEMBER 8
8:30 am Coffee and Registration Reception Room EE/CS 3-176
9:10 am Willard Miller, Fred Dulles,
and Ashwani K. Kapila
Introduction
9:30 am Blaine W. Asay
Los Alamos National Laboratory
Non-Shock Initiation of Explosives: An Abbreviated Review
10:30 am Break Reception Room EE/CS 3-176
11:00 am John Bohdan Bdzil
Los Alamos National Laboratory
Detonation Front Models: Theories and Methods

Material from IMA Talk

2:00 pm Craig M. Tarver
Lawrence Livermore National Laboratory
Non-Equilibrium Chemical Kinetic Effects in Explosive Reactive Flows
3:00 pm Break Reception Room EE/CS 3-176
Contributed Talk
3:30 pm Tariq D. Aslam
Los Alamos National Laboratory
Level Set Methods for Tracking Shocks in Detonation Flows

Material from IMA Talk

4:00 pm Ronald Fedkiw
UCLA
The Ghost Fluid Method for Numerical Modeling of Detonations
4:30 pm IMA Tea IMA East, 400 Lind Hall
A variety of appetizers and beverages will be served.
TUESDAY, NOVEMBER 9
9:15 am Coffee Reception Room EE/CS 3-176
9:30 am Martin Sichel
University of Michigan
Experimentally Validated Numerical Simulations of the Diffraction of Detonations

Material from IMA Talk

10:30 am Break Reception Room EE/CS 3-176
11:00 am - 12:00 pm Geraint O. Thomas
University of Wales
Some Recent Experimental Studies of Transition to Detonation in Gaseous Mixtures
2:00 pm Elaine Oran
Naval Research Laboratory
Numerical Simulations of Gas-Phase Deflagration-to-Detonation
3:00 pm Break Reception Room EE/CS 3-176
Contributed Talk
3:30 pm Mark Short
University of Illinois-Urbana
Multi-dimensional Detonation Stability: Recent Theoretical Advances
4:00 pm Vadim N. Gamezo
Naval Research Laboratory
Cellular Detonations in Systems with High Activation Energy
4:30-5:00 pm Alexei M. Khokhlov
Naval Reseach Laboratory
Numerical Modeling of Thermonuclear Supernova Explosions
WEDNESDAY, NOVEMBER 10
9:15 am Coffee Reception Room EE/CS 3-176
9:30 am Ashwani K. Kapila
Rensselaer Polytechnic Institute
Detonation Evolution due to an Initial Disturbance

Material from IMA Talk

10:30 am Break Reception Room EE/CS 3-176
11:00 am - 12:00 pm Ralph Menikoff
Los Alamos National Laboratory
Granular Explosives and Initiation Sensitivity

pdf (1.2 MB)      ps (9.4 MB)  

2:00 - 3:00 pm Joseph C. Foster
Air Force Research Laboratory/
Munitions Directorate
Experimental Observations Concerning the Mesoscopic Origins of the Low Pressure Thermodynamic Equation of State and High Rate Mechanical Behavior of Plastic Bonded Explosives
(Invited)
THURSDAY, NOVEMBER 11
9:15 am Coffee Reception Room EE/CS 3-176
9:30 am D. Scott Stewart
University of Illinois at Urbana Champaign
Modeling Energetic Materials That Change From Solid to Liquid to Gas to Burnt Vapor
10:30 am Break Reception Room EE/CS 3-176
11:00 am-12:00 pm Bernard J. Matkowsky
Northwestern University
Rapid Filtration Combustion Waves Driven by Convection
Contributed Talk
2:00 pm Steven F. Son
Los Alamos National Laboratory
Combustion of Energetic Materials
2:30 pm Ann R. Karagozian
UCLA
Numerical Resolution of Pulsating Detonation Waves
3:00-3:30 pm Break Reception Room EE/CS 3-176
3:30 pm Joseph M. Powers
University of Notre Dame
Manifold Methods for Energetic Materials
4:00-5:00 pm Discussion
6:00 pm Workshop Dinner TBA
FRIDAY, NOVEMBER 12
9:15 am Coffee Reception Room EE/CS 3-176
9:30 am Pierre Vidal
Universite de Poitiers/ENSMA
Shock-Initiation and Detonation Extinction in Homogeneous or Heterogeneous Explosives: Some Experiments and Models

abstract pdf (23KB)      abstract ps (40KB)  

slides pdf (2.9MB)   slides ps (6.9MB)  

10:30 am Break Reception Room EE/CS 3-176
Contributed Talk
11:00 am Keith A. Gonthier
Lamar University
Modeling Compaction Induced Heating of Energetic Granular Solids

Monday Tuesday Wednesday Thursday Friday

LIST OF CONFIRMED PARTICIPANTS

as of 11/5/99

Name Department Affiliation
Blaine W. Asay   Los Alamos National Laboratory
Tariq D. Aslam   Los Alamos National Laboratory
John Bohdan Bdzil   Los Alamos National Laboratory
Fred Dulles   Institute for Mathematics and its Applications
Ronald Fedkiw Mathematics UCLA
J.C. Foster   Eglin Air Force Base
Vadim Gamezo Lavoratory for Computational Physics & Fluid Naval Research Laboratory
Keith Gonthier   Lamar University
Thomas L. Jackson Center for Simulation of Advance Rockets University of Illinois at Urbana-Champaign
Ash Kapila Mathematics Rensselaer Poytechnic Institute
Ann R. Karagozian Mechanical Aerospace UCLA
Alexei Khokhlov Laboratory for Computational Physics & Fluid Naval Reseach Laboratory
Bernard J. Matkowsky Engineering Science & Applied Math Northwestern University
Ralph Menikoff   Los Alamos National Laboratory
Willard Miller   Institute for Mathematics and its Applications
Elaine Oran   Naval Research Laboratory
Samuel Paolucci Aeospace & Mechanical Engineering University of Notre Dame
Joseph Powers Aeorspace & Mechanical Eng. University of Notre Dame
J.M. Roquejoffre   University of Toulouse
Fadil Santosa MCIM IMA & Minnesota Center for Industrial Math
Akeel Abbas Shah Mathematics UMIST
Mark Short   University of Illinois-Urbana
Martin Sichel Aerospace Engineering University of Michigan
Steven F. Son   Los Alamos National Laboratory
D. Scott Stewart Theoretical & Applied Mechanics University of Illinois at Urbana Champaign
Craig M. Tarver   Lawrence Livermore National Laboratory
Geraint Thomas Physics University of Wales
Pierre Vidal Laboratoire de Combustion et de Detonique Universite de Poitiers / ENSMA
Michael R. Zachariah Mechanical Engineering University of Minnesota


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