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Finger narrowing under local perturbations in the Saffman-Taylor problem

Zocchi, Giovanni ; Shaw, Bruce E. ; Libchaber, Albert ; Kadanoff, Leo P.

Columbia University 1987

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  • Título:
    Finger narrowing under local perturbations in the Saffman-Taylor problem
  • Autor: Zocchi, Giovanni ; Shaw, Bruce E. ; Libchaber, Albert ; Kadanoff, Leo P.
  • Assuntos: Physics ; Mechanics
  • Descrição: We present an experimental study and a numerical simulation of the effect of time-independent, localized perturbations applied to the interface in the Saffman-Taylor fingering problem. When the perturbation is applied at a specific spot near the tip of the finger, the selection of the steady-state shape is drastically changed. In particular, one can obtain fingers with a width well below λ=1/2. A perturbation applied far away from the tip has no effect. We observe the same behavior in the simulation and in the experiment....
  • Editor: Columbia University
  • Data de publicação: 1987

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