Lateral instability in normal viscous fingers

Lateral instability in normal viscous fingers

We study a low-amplitude, long-wavelength lateral instability of the Saffman-Taylor finger by means of a phase-field model. We observe such an instability in two situations in which small dynamic perturbations are overimposed to a constant pressure drop. We first study the case in which the perturba...

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Veröffentlicht in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2005-01, Vol.71 (1 Pt 2), p.016312-016312, Article 016312
Hauptverfasser: Ledesma-Aguilar, R, Quevedo-Reyes, M, Corvera Poiré, E, Hernández-Machado, A
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Sprache:eng
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Dinàmica de fluids
Fluid dynamics
Viscositat
Viscosity
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container_issue 1 Pt 2
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container_title Physical review. E, Statistical, nonlinear, and soft matter physics
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creator Ledesma-Aguilar, R
Quevedo-Reyes, M
Corvera Poiré, E
Hernández-Machado, A
description We study a low-amplitude, long-wavelength lateral instability of the Saffman-Taylor finger by means of a phase-field model. We observe such an instability in two situations in which small dynamic perturbations are overimposed to a constant pressure drop. We first study the case in which the perturbation consists of a single oscillatory mode and then a case in which the perturbation consists of temporal noise. In both cases the instability undergoes a process of selection.
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subjects Dinàmica de fluids
Fluid dynamics
Viscositat
Viscosity
title Lateral instability in normal viscous fingers
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