Non-Newtonian sink flow cusps
Abstract
This is an entry for the Gallery of Fluid Motion of the 62st Annual Meeting of the APS-DFD (fluid dynamics videos). This video shows the formation of sharps cusps in the interface of a viscoelastic liquid with air considering a selective withdrawal device. We found that a wide variety of shapes can be observed, similar to those appearing in the rear of air bubbles ascending in non-Newtonian liquids.
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