Title:
|
Anomalous roughening of viscous fluid fronts in spontaneous imbition
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Author:
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Soriano i Fradera, Jordi; Mercier, A.; Planet Latorre, Ramon; Hernández Machado, Aurora; Rodríguez Díaz, Miguel Ángel; Ortín, Jordi, 1959-
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Other authors:
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Universitat de Barcelona |
Abstract:
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We report experiments on spontaneous imbibition of a viscous fluid by a model porous medium in the absence of gravity. The average position of the interface satisfies Washburn’s law. Scaling of the interface fluctuations suggests a dynamic exponent
z
≃
3
, indicative of global dynamics driven by capillary forces. The complete set of exponents clearly shows that interfaces are not self-affine, exhibiting distinct local and global scaling, both for time (
β
=
0.64
±
0.02
,
β
∗
=
0.33
±
0.03
) and space (
α
=
1.94
±
0.20
,
α
loc
=
0.94
±
0.10
). These values are compatible with an intrinsic anomalous scaling scenario. |
Subject(s):
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-Dinàmica de fluids -Termodinàmica -Fluid dynamics -Thermodynamics |
Rights:
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(c) American Physical Society, 2005
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Document type:
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Article Article - Published version |
Published by:
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American Physical Society
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