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Título: | Depinning and creeplike motion of wetting fronts in weakly vibrated granular media |
Autor: | Balankin, Alexander S.; García Otamendi, E.; Samayoa, D.; Patiño, Julián CSIC ORCID; Rodríguez, Miguel A. CSIC ORCID | Fecha de publicación: | 2012 | Editor: | American Physical Society | Citación: | Physical Review E 85(3): 036313 (2012) | Resumen: | We study the effect of weak vibrations on the imbibition of water in granular media. In our experiments, we have observed that as soon as the vibration is applied, an initially pinned wetting front advances in the direction of imbibition. We found that the front motion is governed by the avalanches of localized intermittent advances directed at 45 δ to the imbibition direction. When the rescaled gravitational acceleration of vertical vibrations is in the range of 0.81≤G≤0.95, we observed an almost steady motion of wetting front with a constant velocity v cr(G) exp-1/G during more than 20 min, whereas at lower accelerations (0.5≤G≤0.8) the front velocity decreases in time as vt -δ. We suggest that the steady motion of an imbibition front in a weakly vibrated granular medium can be treated as a creep motion associated with nonthermal temporal fluctuations of packing density in a weakly vibrated granular medium. © 2012 American Physical Society. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevE.85.036313 | URI: | http://hdl.handle.net/10261/51921 | DOI: | 10.1103/PhysRevE.85.036313 | Identificadores: | doi: 10.1103/PhysRevE.85.036313 issn: 1539-3755 e-issn: 1550-2376 |
Aparece en las colecciones: | (IFCA) Artículos |
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