Finger narrowing under local perturbations in the Saffman-Taylor problem.
Finger narrowing under local perturbations in the Saffman-Taylor problem.
复制标题
萨夫曼-泰勒问题中局部扰动下的手指变窄。
DOI：
10.1103/physreva.36.1894
复制
发表时间：
1987
期刊：
影响因子：
--
通讯作者：
Kadanoff
中科院分区：
文献类型：
--
作者：
Zocchi;Shaw;Libchaber;Kadanoff
我们给出了Saffman-Taylor指进问题中与时间无关的局域微扰对界面的影响的实验研究和数值模拟。当摄动施加在指尖附近的特定点上时，稳态形状的选择发生了巨大的变化。具体地说，可以得到宽度远低于指尖的手指施加远离尖端的扰动没有任何效果。我们在模拟和实验中观察到了相同的行为。
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 steadystate shape is drastically changed. In particular, one can obtain fingers with a width well below A perturbation applied far away from the tip has no effect. We observe the same behavior in the simulation and in the experiment.