Spatiotemporal patterns in models of cross-flow reactors. Regular and oscillatory kinetics

We simulate and analyze the behavior of stationary and moving spatially per iodic patterns in a simple cross-flow reactor with a first-order exothermic reactor and realistically high Pe and Le. Novel nonTuring stationary patte rns emerge due to reactor-diffusion-convection interaction in the simple mo del that incorporates only concentration and temperature as its variables. We extend our previous analysis to account for reversible changes in a cata lytic activity. We conduct linear and weakly nonlinear analysis around the critical point - the perturbation amplification threshold, as well as numer ical simulations. For the limit case Pe -, co the spatial behavior of the d istributed system is analogous to the temporal behavior of the related CSTR problem. In the vicinity of the bifurcation point the emerging spatiotempo ral patterns drastically depends on the type of a phase plane and both regu lar and aperiodic (chaotic) behavior was observed. (C) 2001 Elsevier Scienc e Ltd. All rights reserved.