TY - JOUR
T1 - Whipping of electrified liquid jets
AU - Guerrero, Josefa
AU - Rivero, Javier
AU - Gundabala, Venkata R.
AU - Perez-Saborid, Miguel
AU - Fernandez-Nieves, Alberto
PY - 2014/9/23
Y1 - 2014/9/23
N2 - Weapply an electric field to amoderately conducting liquid surrounded by another coflowing liquid, all inside a glass-based microfluidic device, to study nonaxisymmetric instabilities. Wefind that the bending of the electrified jet results in a steady-state, helicoidal structure with a constant opening angle. Remarkably, the characteristic phase speed of the helicoidalwave only depends on the charge carried by the jet in the helicoidal region and its stability critically depends on the properties of the coflowing liquid. In fact, the steady-state helical structure becomes chaotic when the longest characteristic time is that of the inner liquid rather than that of the outer coflowing liquid. We also perform a numerical analysis to show that the natural preference of the jet is to adopt the conical helix structure observed experimentally.
AB - Weapply an electric field to amoderately conducting liquid surrounded by another coflowing liquid, all inside a glass-based microfluidic device, to study nonaxisymmetric instabilities. Wefind that the bending of the electrified jet results in a steady-state, helicoidal structure with a constant opening angle. Remarkably, the characteristic phase speed of the helicoidalwave only depends on the charge carried by the jet in the helicoidal region and its stability critically depends on the properties of the coflowing liquid. In fact, the steady-state helical structure becomes chaotic when the longest characteristic time is that of the inner liquid rather than that of the outer coflowing liquid. We also perform a numerical analysis to show that the natural preference of the jet is to adopt the conical helix structure observed experimentally.
KW - Charged jets
KW - Electro-coflow
KW - Electrospinning
KW - Instability
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U2 - 10.1073/pnas.1411698111
DO - 10.1073/pnas.1411698111
M3 - Article
AN - SCOPUS:84907260944
SN - 0027-8424
VL - 111
SP - 13763
EP - 13767
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
IS - 38
ER -