Multiple coexisting states of a falling viscous thread
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This fluid dynamics video shows experiments in which a thin thread of viscous fluid (viscosity 950 cS) ejected at a rate 0.19 ml/s from a hole 2 mm in diameter falls a distance 14 cm onto a solid plate. The thread exhibits three different states that succeed each other in time in a random manner: (1) axisymmetric stagnation flow; (2) steady coiling; and (3) rotatory folding. Transitions among these states are caused by spontaneous finite-amplitude perturbations that travel down the thread.
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APS DFD 2009 Gallery of Fluid Motion
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2009-10-16T08:16:12Z
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free-surface flows; liquid rope coiling
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Government Document
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video/moving image