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Advisor(s)
Abstract(s)
A one-dimensional model was built to simulate the non-steady radial combustion
propagation on thin circular samples of Fe2O3/Aluminum thermite mixtures. The model
considers zero order kinetics and conductive/radiative heat transfer. All the properties of
the system are assumed to vary with the temperature and composition during the
propagation and phase transitions are also contemplated. These features, not yet
considered in the literature, allowed the obtainment of realistic solutions, readily
comparable with experimental values measured in an earlier work. The experimental
combustion velocities were used to adjust the kinetic constant of the model, in order to
give it a good predictive capability. The predicted combustion temperatures and reaction
extents were higher than the experimental. This was justified by the heat losses due to
the spraying of products away from the combustion system and the incompleteness of
the reaction, observed in experimental conditions and not considered in the model.
Description
Keywords
Combustion Fe2O3/Aluminum thermite Modelling Finite differences
Citation
Durães, Luísa; Brito, Paulo; Campos, José; Portugal, António (2006). Modelling and simulation of Fe2O3/aluminum thermite combustion: experimental validation. Computer Aided Chemical Engineering. ISSN 1570-7946. 21:1, p.365-370