Inhibition of the finite-time singularity during droplet fission of a polymeric fluid.
When a drop of fluid detaches from a capillary, singular behavior ensues. We show that the addition of very small amounts of polymer inhibits this singularity in an abrupt way and gives rise, after a period of self-similar dynamics as for simple liquids, to long-lived cylindrical necks or filaments which thin exponentially in time. This abrupt change occurs when the elongation rate epsilon* becomes comparable to the inverse of the polymer relaxation time leading to a large elongational viscosity eta(E) of the dilute polymer solution.
Amarouchene
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Y
Centre de Physique Moléculaire Optique et Hertzienne, Université Bordeaux1, UMR 5798, 351 cours de la liberation 33405 Talence, France.
Bonn
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D
Meunier
J
J
Kellay
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H