Lateral instability in normal viscous fingers

Rodrigo Ledesma-Aguilar, M. Quevedo-Reyes, E. Corvera Poiré, Aurora Hernández-Machado

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)016312
JournalPhysical Review E
Issue number1
Publication statusPublished - 2005


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