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Related Experiment Videos

Front explosion in a periodically forced surface reaction.

Jörn Davidsen1, Alexander Mikhailov, Raymond Kapral

  • 1Max-Planck-Institut für Physik Komplexer Systeme, Nöthnitzer Strasse 38, 01187 Dresden, Germany. davidsen@pks.mpg.de

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|December 31, 2005
PubMed
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Front explosion phenomena in resonantly forced reaction-diffusion systems are studied. Below a critical forcing amplitude, fronts explode, leading to complex dynamics like turbulence or labyrinthine patterns in CO oxidation on Pt(110).

Area of Science:

  • Chemical kinetics
  • Surface science
  • Nonlinear dynamics

Background:

  • Resonantly forced oscillatory reaction-diffusion systems can display complex interfacial structures.
  • Front explosion, characterized by unbounded interfacial zone growth, occurs below critical forcing amplitudes.

Purpose of the Study:

  • Investigate front explosion phenomena in a realistic model of catalytic CO oxidation on a Pt(110) surface.
  • Analyze dynamics in both 2:1 and 3:1 resonantly forced regimes.

Main Methods:

  • Utilized a realistic model for catalytic CO oxidation on Pt(110).
  • Simulated and analyzed reaction-diffusion dynamics under 2:1 and 3:1 resonant forcing.

Main Results:

  • In the 2:1 regime, stationary fronts explode into defect-mediated turbulent states.

Related Experiment Videos

  • In the 3:1 regime, propagating fronts slow to zero velocity, forming 2:1 resonantly locked labyrinthine patterns.

    • Conclusions:

    • Front explosion dynamics are modelable for catalytic CO oxidation on Pt(110).
    • The predicted dynamics, including turbulence and pattern formation, are potentially observable in experiments.