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Propagation failures, breathing pulses, and backfiring in an excitable reaction-diffusion system
Niklas Manz1, Oliver Steinbock
1Florida State University, Department of Chemistry and Biochemistry, Tallahassee, Florida 32306-4390, USA.
Chaos (Woodbury, N.Y.)
|October 4, 2006
Summary
Experiments with the Belousov-Zhabotinsky reaction using 1,4-cyclohexanedione reveal complex behaviors in traveling oxidation pulses. The study details pulse propagation failures, breathing pulses, and backfiring pulses in this pseudo-one-dimensional excitable system.
Area of Science:
- Chemical kinetics
- Nonlinear dynamics
- Excitable media
Background:
- The Belousov-Zhabotinsky reaction is a classic example of a chemical system exhibiting complex, self-organizing behavior.
- Pseudo-one-dimensional systems offer a simplified yet rich platform for studying wave propagation phenomena.
- Understanding propagation failures is crucial for controlling pattern formation in excitable media.
Purpose of the Study:
- To investigate the behavior of traveling oxidation pulses in a pseudo-one-dimensional Belousov-Zhabotinsky reaction.
- To characterize novel pulse dynamics, including propagation failures, breathing, and backfiring.
- To explore the role of 1,4-cyclohexanedione as an organic substrate in this system.
Main Methods:
- Utilized a pseudo-one-dimensional setup for the Belousov-Zhabotinsky reaction.
- Employed 1,4-cyclohexanedione as the organic substrate.
- Observed and analyzed traveling oxidation pulses and their dynamic behaviors.
Main Results:
- Demonstrated complex sequences of propagation failures in pulse trains.
- Observed "breathing" pulses exhibiting periodic changes in speed and size.
- Documented "backfiring" pulses that generate new, oppositely propagating pulses.
Conclusions:
- The 1,4-cyclohexanedione-based Belousov-Zhabotinsky system exhibits rich and complex dynamics.
- Propagation failures, breathing, and backfiring represent significant deviations from simple pulse propagation.
- These findings contribute to the fundamental understanding of wave dynamics in excitable chemical systems.
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