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http://hdl.handle.net/2445/18759
Title: | Phase-field approach to spatial perturbations in normal Saffman-Taylor fingers |
Author: | Quevedo-Reyes, M. Hernández Machado, Aurora Corvera Poiré, Eugenia |
Keywords: | Física estadística Dinàmica de fluids Pertorbació (Dinàmica quàntica) Termodinàmica Sistemes dinàmics diferenciables Statistical physics Fluid dynamics Perturbation (Quantum dynamics) Thermodynamics Differentiable dynamical systems |
Issue Date: | 2006 |
Publisher: | The American Physical Society |
Abstract: | We make a numerical study of the effect that spatial perturbations have in normal Saffman-Taylor fingers driven at constant pressure gradients. We use a phase field model that allows for spatial variations in the Hele-Shaw cell. We find that, regardless of the specific way in which spatial perturbations are introduced, a lateral instability develops on the sides of the propagating Saffman-Taylor finger. Moreover, the instability exists regardless of the intensity of spatial perturbations in the cell as long as the perturbations are felt by the finger tip. If, as the finger propagates, the spatial perturbations felt by the tip change, the instability is nonperiodic. If, as the finger propagates, the spatial perturbations felt by the tip are persistent, the instability developed is periodic. In the later case, the instability is symmetrical or asymmetrical depending on the intensity of the perturbation. |
Note: | Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevE.73.066308 |
It is part of: | Physical Review E, 2006, vol. 73, p. 066308-1-066308-8 |
URI: | http://hdl.handle.net/2445/18759 |
Related resource: | http://dx.doi.org/10.1103/PhysRevE.73.066308 |
ISSN: | 1063-651X |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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