Singularity dynamics in curvature collapse and jet eruption on a fluid surface

Benjamin W. Zeff, Benjamin Kleber, Jay Fineberg and Daniel P. Lathrop ()
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Benjamin W. Zeff: The University of Maryland
Benjamin Kleber: The University of Maryland
Jay Fineberg: The Racah Institute of Physics, The Hebrew University of Jerusalem
Daniel P. Lathrop: The University of Maryland

Nature, 2000, vol. 403, issue 6768, 401-404

Abstract: Abstract Finite-time singularities—local divergences in the amplitude or gradient of a physical observable at a particular time—occur in a diverse range of physical systems. Examples include singularities capable of damaging optical fibres and lasers in nonlinear optical systems1, and gravitational singularities2 associated with black holes. In fluid systems, the formation of finite-time singularities cause spray and air-bubble entrainment3, processes which influence air–sea interaction on a global scale4,5. Singularities driven by surface tension have been studied in the break-up of pendant drops6,7,8,9 and liquid sheets10,11,12. Here we report a theoretical and experimental study of the generation of a singularity by inertial focusing, in which no break-up of the fluid surface occurs. Inertial forces cause a collapse of the surface that leads to jet formation; our analysis, which includes surface tension effects, predicts that the surface profiles should be describable by a single universal exponent. These theoretical predictions correlate closely with our experimental measurements of a collapsing surface singularity. The solution can be generalized to apply to a broad class of singular phenomena.

Date: 2000
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DOI: 10.1038/35000151

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