Condensed Phase Reaction Waves with Variable Thermo-Physical Characteristics

We study the thermal propagation of a reaction wave through a condensed medium in the case when the thermal conductivity of the mixture may change in a jumpwise fashion at some critical temperature. This can occur, e.g., when the actual heat transfer processes are accounted for as a heat conduction...

Full description

Saved in:
Bibliographic Details
Published in:Combustion science and technology 1997-08, Vol.127 (1-6), p.29-53
Main Authors: Volpert, VL. A., Volpert, VIT. A.
Format: Article
Language:English
Subjects:
Applied sciences
Combustion. Flame
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Reaction waves
Self-propagating high-temperature synthesis
stability
Theoretical studies
Theoretical studies. Data and constants. Metering
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We study the thermal propagation of a reaction wave through a condensed medium in the case when the thermal conductivity of the mixture may change in a jumpwise fashion at some critical temperature. This can occur, e.g., when the actual heat transfer processes are accounted for as a heat conduction process with an effective thermal conductivity. Then a change in the actual mechanism of heat transfer at some point in the reaction wave may result in a significantly different effective thermal conductivity. Our model also allows for the thermal conductivity of the product to be different from that for the initial reactants. We have determined the structure of uniformly propagating reaction waves and analyzed their stability. We have shown, in particular, that if the thermal conductivity is increased in a region just ahead of the reaction zone then the wave is either stabilized on destabilized depending on whether the width of this region is below or above a critical value.
ISSN:0010-2202
1563-521X
DOI:10.1080/00102209708935685