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http://dx.doi.org/10.18419/opus-6967
Autor(en): | Bär, Markus Gottschalk-Mazouz, Niels Eiswirth, Markus Ertl, Gerhard |
Titel: | Spiral waves in a surface reaction : model calculations |
Erscheinungsdatum: | 1994 |
Dokumentart: | Zeitschriftenartikel |
Erschienen in: | Journal of Chemical Physics 100 (1994), S. 1202-1214. URL http://dx.doi.org./10.1063/1.466650 |
URI: | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-40983 http://elib.uni-stuttgart.de/handle/11682/6984 http://dx.doi.org/10.18419/opus-6967 |
Zusammenfassung: | A systematic study of spiral waves in a realistic reaction-diffusion model describing the isothermal CO oxidation on Pt(110) is carried out. Spirals exist under oscillatory, excitable, and bistable (doubly metastable) conditions. In the excitable region, two separate meandering transitions occur, both when the time scales become strongly different and when they become comparable. By the assumption of surface defects of the order of 10 µm, to which the spirals can be pinned, the continuous distribution of wavelengths observed experimentally can be explained. An external periodic perturbation generally causes a meandering motion of a free spiral, while a straight drift results, if the period of the perturbation divided by the rotation period is a natural number. |
Enthalten in den Sammlungen: | 15 Fakultätsübergreifend / Sonstige Einrichtung |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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gott1.pdf | 1,56 MB | Adobe PDF | Öffnen/Anzeigen |
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