Modeling the self-propagation reaction in heterogeneous and dense media: Application to Al/CuO thermite

This article provides a computational analysis of the reaction fully-dense layered aluminum and copper oxide systems. After detailed presentation 2D nonstationary model implementing both oxygen diffusion, propagation front in an Al/CuO thin film was studied. The qualitatively reproduces dependency progression rate spatially as function fuel concentration. Calculations also evidence inverse evolution flame width with respect to velocity. A procedure estimate heat loss generated by fact that reactants products may vaporize prior completion proposed imposing temperature limit close Cu vaporization point. work shows microscopic fluctuations instantaneous velocity can be observed for reactant diffusion activation energy (Ea) 125 kJ/mol, before quenching greater Ea. Finally, we demonstrate potential this new investigate thermal effect additives such metallic impurities lead corrugation at microscale. simulations show particle acts first boost its high conductivity helps upfront heating. Then, being sink, local slowing down is observed.