PROPAGATING FRONTS IN REACTION-DIFFUSION SYSTEMS

Propagating reaction-diffusion fronts constitute one of the paradigms in the realm of the nonlinear chemical phenomena. In this paper differ ent situations are considered. Firstly, we discuss the problem of fron t propagation in a two-variable chemical system exhibiting multiple st ationary states. Emphasis is put on the question of velocity selection . In section 3 of our contribution, the question of front propagating in spatially modulated and noisy media is addressed. Finally, we also briefly comment on the problem of reaction-diffusion fronts in non-qui escent media. In this particular scenario we simply aim at introducing the two basic propagation modes, i.e., thin versus distributed reacti on fronts, that are identified in our numerical simulations.