Preprint E29/2012
Simulation of spontaneous ignition in porous media
Johannes Bruining | CastaƱeda, Pablo | Marchesin, Dan
Keywords: 30 CILAMCE | Chemical reactor | Porous media | In-situ combustion | Geometrical setting | Heat losses
We study the stability of combustion in a porous medium in a simplified model that takes into account the balance between heat generation and heat losses. The temperature dependence of heat generation is given by Arrhenius law. Heat losses are due to conduction to the rock formation. The system evolution is described by an infinite number of nonlinear modes. We show that its long time behavior is dictated by the two dominant modes, whose phase diagram contains two attractors and a saddle, justifying the picture in classical chemical engineering.