Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/24908
Title: Three-dimensional aspects of fluid flows in channels. II. Effects of meniscus and thin film regimes on viscous fingers
Author: Ledesma Aguilar, Rodrigo Andrés
Pagonabarraga Mora, Ignacio
Hernández Machado, Aurora
Keywords: Dinàmica de fluids
Pel·lícules fines
Viscositat
Capil·laritat
Fluid dynamics
Thin films
Viscosity
Capillarity
Issue Date: 31-Oct-2007
Publisher: American Institute of Physics
Abstract: We perform a three-dimensional study of steady state viscous fingers that develop in linear channels. By means of a three-dimensional lattice-Boltzmann scheme that mimics the full macroscopic equations of motion of the fluid momentum and order parameter, we study the effect of the thickness of the channel in two cases. First, for total displacement of the fluids in the channel thickness direction, we find that the steady state finger is effectively two-dimensional and that previous two-dimensional results can be recovered by taking into account the effect of a curved meniscus across the channel thickness as a contribution to surface stresses. Second, when a thin film develops in the channel thickness direction, the finger narrows with increasing channel aspect ratio in agreement with experimental results. The effect of the thin film renders the problem three-dimensional and results deviate from the two-dimensional prediction.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1063/1.2801513
It is part of: Physics of Fluids, 2007, vol. 19, p. 102113-1-102113-8
Related resource: http://dx.doi.org/10.1063/1.2801513
URI: http://hdl.handle.net/2445/24908
ISSN: 0021-8979
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)
Articles publicats en revistes (Física Quàntica i Astrofísica)

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