Wave propagation in a medium with disordered excitability
The effect of quenched disorder on the propagation of autowaves in excitable media is studied both experimentally and numerically in relation to the light-sensitive Belousov-Zhabotinsky reaction. The spatial disorder is introduced through a random distribution with two different levels of transmitta...
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| Veröffentlicht in: | Physical review letters 1998 |
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| creator | Sendiña Nadal, Irene Muñuzuri, A. P Vives, Daniel Pérez Muñuzuri, Vicente Casademunt i Viader, Jaume Ramírez Piscina, Laureano Sancho, José M Sagués i Mestre, Francesc |
| description | The effect of quenched disorder on the propagation of autowaves in excitable media is studied both experimentally and numerically in relation to the light-sensitive Belousov-Zhabotinsky reaction. The spatial disorder is introduced through a random distribution with two different levels of transmittance. In one dimension the (time-averaged) wave speed is smaller than the corresponding to a homogeneous medium with the mean excitability. Contrarily, in two dimensions the velocity increases due to the roughening of the front. Results are interpreted using kinematic and scaling arguments. In particular, for d = 2 we verify a theoretical prediction of a power-law dependence for the relative change of the propagation speed on the disorder amplitude. |
| format | Article |
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P ; Vives, Daniel ; Pérez Muñuzuri, Vicente ; Casademunt i Viader, Jaume ; Ramírez Piscina, Laureano ; Sancho, José M ; Sagués i Mestre, Francesc</creator><creatorcontrib>Sendiña Nadal, Irene ; Muñuzuri, A. P ; Vives, Daniel ; Pérez Muñuzuri, Vicente ; Casademunt i Viader, Jaume ; Ramírez Piscina, Laureano ; Sancho, José M ; Sagués i Mestre, Francesc</creatorcontrib><description>The effect of quenched disorder on the propagation of autowaves in excitable media is studied both experimentally and numerically in relation to the light-sensitive Belousov-Zhabotinsky reaction. The spatial disorder is introduced through a random distribution with two different levels of transmittance. In one dimension the (time-averaged) wave speed is smaller than the corresponding to a homogeneous medium with the mean excitability. Contrarily, in two dimensions the velocity increases due to the roughening of the front. Results are interpreted using kinematic and scaling arguments. In particular, for d = 2 we verify a theoretical prediction of a power-law dependence for the relative change of the propagation speed on the disorder amplitude.</description><identifier>ISSN: 0031-9007</identifier><language>eng</language><publisher>American Physical Society</publisher><subject>Chemistry, Physical and theoretical ; Dinàmica de fluids ; Fluid dynamics ; Mecànica quàntica ; Quantum mechanics ; Química física</subject><ispartof>Physical review letters, 1998</ispartof><rights>(c) American Physical Society, 1998 info:eu-repo/semantics/openAccess</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,4010,26951</link.rule.ids></links><search><creatorcontrib>Sendiña Nadal, Irene</creatorcontrib><creatorcontrib>Muñuzuri, A. 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| identifier | ISSN: 0031-9007 |
| ispartof | Physical review letters, 1998 |
| issn | 0031-9007 |
| language | eng |
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| source | Recercat; American Physical Society Journals |
| subjects | Chemistry, Physical and theoretical Dinàmica de fluids Fluid dynamics Mecànica quàntica Quantum mechanics Química física |
| title | Wave propagation in a medium with disordered excitability |
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