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Title: | The long cross-over dynamics of capillary imbibition |
Author: | Ruiz-Gimenez, E. Armstrong, S. Leveque, A. Michel, C. Pagonabarraga Mora, Ignacio Wells, G.G. Hernández Machado, Aurora Ledesma Aguilar, Rodrigo Andrés |
Keywords: | Capil·laritat Dinàmica de fluids Viscositat Capillarity Fluid dynamics Viscosity |
Issue Date: | 6-Jul-2022 |
Publisher: | Cambridge University Press |
Abstract: | Spontaneous capillary imbibition is a classical problem in interfacial fluid dynamics with a broad range of applications, from microfluidics to agriculture. Here we study the duration of the cross-over between an initial linear growth of the imbibition front to the diffusive-like growth limit of Washburn's law. We show that local-resistance sources, such as the inertial resistance and the friction caused by the advancing meniscus, always limit the motion of an imbibing front. Both effects give rise to a cross-over of the growth exponent between the linear and the diffusive-like regimes. We show how this cross-over is much longer than previously thought - even longer than the time it takes the liquid to fill the porous medium. Such slowly slowing-down dynamics is likely to cause similar long cross-over phenomena in processes governed by wetting. |
Note: | Reproducció del document publicat a: https://doi.org/10.1017/jfm.2022.248 |
It is part of: | Journal of Fluid Mechanics, 2022, vol. 939, p. A39 |
URI: | http://hdl.handle.net/2445/193868 |
Related resource: | https://doi.org/10.1017/jfm.2022.248 |
ISSN: | 0022-1120 |
Appears in Collections: | Articles publicats en revistes (Institut de Nanociència i Nanotecnologia (IN2UB)) Articles publicats en revistes (Física de la Matèria Condensada) Articles publicats en revistes (Institut de Recerca en Sistemes Complexos (UBICS)) |
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