Title:
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Perturbing Hele-Shaw flow with a small gap gradient
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Author:
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Zhao, H.; Casademunt i Viader, Jaume; Yeung, C.; Maher, J. V.
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Other authors:
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Universitat de Barcelona |
Abstract:
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A controlled perturbation is introduced into the Saffman-Taylor flow problem by adding a gradient to the gap of a Hele-Shaw cell. The stability of the single-finger steady state was found to be strongly affected by such a perturbation. Compared with patterns in a standard Hele-Shaw cell, the single Saffman-Taylor finger was stabilized or destabilized according to the sign of the gap gradient. While a linear stability analysis shows that this perturbation should have a negligible effect on the early-stage pattern formation, the experimental data indicate that the characteristic length for the initial breakup of a flat interface has been changed by the perturbation. |
Subject(s):
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-Dinàmica de fluids -Pertorbació (Dinàmica quàntica) -Fluid dynamics -Perturbation (Quantum dynamics) |
Rights:
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(c) The American Physical Society, 1992
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Document type:
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Article Article - Published version |
Published by:
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The American Physical Society
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