Título:
|
Fluctuation-dominated kinetics under stirring
|
Autor/a:
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Reigada Sanz, Ramon; Sagués i Mestre, Francesc; Sokolov, Igor M., 1958-; Sancho, José M.; Blumen, Alexander
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Otros autores:
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Universitat de Barcelona |
Abstract:
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We investigate the effects of stirring on the kinetics of the
A
+
B
→
0
reaction under stoichiometrical conditions in 2D. We consider both a steady eddy-lattice flow and a random flow mimicking turbulence. In both situations complex decay patterns are detected. Only an intermediate stage of the reaction is dominated by mixing. The long-time behavior shows fluctuation-dominated kinetics,
c
(
t
)
∝
t
−
1
/
2
, governed by effective diffusion. For the case of an eddy-lattice flow a very slow intermediate regime emerges,
c
(
t
)
∝
t
−
1
/
4
, which is associated with the closed topology of flow lines. |
Materia(s):
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-Química física -Física estadística -Thermodinàmica -Dinàmica de fluids -Chemistry, Physical and theoretical -Statistical physics -Fluid dynamics -Thermodynamics |
Derechos:
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(c) American Physical Society, 1997
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Tipo de documento:
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Artículo Artículo - Versión publicada |
Editor:
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American Physical Society
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Compartir:
|
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