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Title: Anomalous roughening of viscous fluid fronts in spontaneous imbition
Author: Soriano i Fradera, Jordi
Mercier, A.
Planet Latorre, Ramon
Hernández Machado, Aurora
Rodríguez Díaz, Miguel Ángel
Ortín, Jordi, 1959-
Keywords: Dinàmica de fluids
Fluid dynamics
Issue Date: 2005
Publisher: American Physical Society
Abstract: 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.
Note: Reproducció digital del document proporcionada per PROLA i
It is part of: Physical Review Letters, 2005, vol. 95, núm. 10, p. 104501
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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