Lateral instability in normal viscous fingers

Ledesma-Aguilar, Rodrigo, Quevedo-Reyes, M., Corvera Poiré, E. and Hernández-Machado, Aurora (2005) Lateral instability in normal viscous fingers. Physical Review E, 71 (1). 016312. ISSN 1539-3755

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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.

Item Type: Article
Subjects: F200 Materials Science
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 06 Jan 2014 09:03
Last Modified: 12 Oct 2019 19:06

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