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In this work, we study numerically the thinning of a perfectly conducting, slightly viscoelastic liquid jet under a radial electric field by using a one-dimensional model. In the presence of… Click to show full abstract
In this work, we study numerically the thinning of a perfectly conducting, slightly viscoelastic liquid jet under a radial electric field by using a one-dimensional model. In the presence of the electric field, the viscoelastic jet develops into a stable beads-on-a-string structure with a uniform thickness filament as in the non-electrified case, but the $$ 1/3De $$1/3De (De: the Deborah number) exponential law of filament thinning and polymer stress growth holds no more. The electric field decelerates the thinning of the jet and induces periodic oscillations of the flow properties. The balance between the surface tension, viscoelastic stress and electrostatic force is absent in the filament, and as a result, the extensional flow there becomes unsteady.
Journal Title: Microfluidics and Nanofluidics
Year Published: 2017
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