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Singularity dynamics in a Hele-Shaw flow with surface tension

机译:具有表面张力的Hele-Shaw流中的奇异动力学

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摘要

The singularity dynamics of two immiscible fluids in a Hele-Shaw cell is studied using two numerical methods. Evidence is given for the existence of -4/3 singularities in this flow. Their trajectories are accurately approximated by the solutions of a system of ordinary differential equations for the position of couples of zeros and poles. This model also describes secondary tip-splitting instabilities and remains valid for values of the surface tension and time intervals where previous perturbative calculations do not apply. [References: 13]
机译:使用两种数值方法研究了Hele-Shaw池中两种不混溶流体的奇异动力学。给出了在该流中存在-4/3奇点的证据。通过零点和极点对的位置的常微分方程组的解可以精确地估计它们的轨迹。该模型还描述了次级尖端分裂不稳定性,并且对于表面张力和时间间隔的值仍然有效,而以前的扰动计算则不适用。 [参考:13]

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