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carbon compounds; platinum; catalysts; oxidation; bifurcation; pattern formation; excitable media; traveling waves; chemical waves; CO oxidation; spiral waves; microfluidics; propagation; fynamics; reconstruction
Abstract:
We explore the effect of boundary curvature on the instability of reactive pulses in the catalytic oxidation of CO on microdesigned Pt catalysts. Using ring-shaped domains of various radii, we find that the pulses disappear (decollate from the inert boundary) at a turning point bifurcation, and we trace this boundary in both physical and geometrical parameter space. These computations corroborate experimental observatioons of pulse decollation.
