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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