Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/180183
Title: | Fluid front morphologies in gap-modulated Hele-Shaw cells |
Author: | Díaz Piola, Lautaro Planet Latorre, Ramon Campàs, Otger Casademunt i Viader, Jaume Ortín, Jordi, 1959- |
Keywords: | Dinàmica de fluids Interfícies (Ciències físiques) Nanotecnologia Fluid dynamics Interfaces (Physical sciences) Nanotechnology |
Issue Date: | 25-Sep-2017 |
Publisher: | American Physical Society |
Abstract: | We consider the displacement of an inviscid fluid (air) by a viscous fluid (oil) in a narrow channel with gap-thickness modulations. The interfacial dynamics of this problem is strongly nonlocal and exhibits competing effects from capillarity and permeability. We derive analytical predictions of steady-state front morphologies, which are exact at linear level in the case of a persistent modulation in the direction of front advancement. The theoretical predictions are in good agreement with experimental measurements of steady-state front morphologies obtained in a Hele-Shaw cell with modulations of the channel depth, consisting on three parallel tracks of reduced depth, for small gap modulations. The relative average distance between theoretical and experimental fronts in the region around the central track is smaller than about 4%, provided that the height of the tracks is less than 13% of the total channel depth and the local distortion of the front height h is small enough (|∇h|<0.8) for the linear approximation to hold. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevFluids.2.094006 |
It is part of: | Physical Review Fluids, 2017, vol. 2, num. 9, p. 094006-1-094006-12 |
URI: | http://hdl.handle.net/2445/180183 |
Related resource: | https://doi.org/10.1103/PhysRevFluids.2.094006 |
ISSN: | 2469-990X |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
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