Wave competition in excitable modulated media
The propagation of an initially planar front is studied within the framework of the photosensitive Belousov- Zhabotinsky reaction modulated by a smooth spatial variation of the local front velocity in the direction perpendicular to front propagation. Under this modulation, the wave front develops se...
| Autores: | , , , , , , , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 1997 |
| País: | España |
| Recursos: | Universitat Politècnica de Catalunya (UPC) |
| Repositório: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglês |
| OAI Identifier: | oai:upcommons.upc.edu:2117/16975 |
| Acesso em linha: | https://hdl.handle.net/2117/16975 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Nonequilibrium thermodynamics Front propagation Chemical waves Excitable media Belousov-Zhabotinsky reaction Inhomogeneous media Termodinàmica del desequilibri Àrees temàtiques de la UPC::Física::Termodinàmica |
| Resumo: | The propagation of an initially planar front is studied within the framework of the photosensitive Belousov- Zhabotinsky reaction modulated by a smooth spatial variation of the local front velocity in the direction perpendicular to front propagation. Under this modulation, the wave front develops several fingers corresponding to the local maxima of the modulation function. After a transient, the wave front achieves a stationary shape that does not necessarily coincide with the one externally imposed by the modulation. Theoretical predictions for the selection criteria of fingers and steady-state velocity are experimentally validated. |
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