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Journal article

Lateral instability in normal viscous fingers.

Abstract:
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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Publisher copy:
10.1103/physreve.71.016312

Authors


Journal:
Physical review. E, Statistical, nonlinear, and soft matter physics
Volume:
71
Issue:
1 Pt 2
Pages:
016312
Publication date:
2005-01-05
DOI:
EISSN:
1550-2376
ISSN:
1539-3755
URN:
uuid:9989bca8-f9cf-4641-b42c-5e22cf62a709
Source identifiers:
176531
Local pid:
pubs:176531
Language:
English

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